催化学报 ›› 2026, Vol. 81: 69-96.DOI: 10.1016/S1872-2067(25)64906-0
李沛坤a, 吕井辉a(
), 赵以勇a, 吴汉a, 张祥豪a, 陆倩楠a, Yizhi Xiangb, Blaž Likozarc, Matej Hušc,d, Adriana Zaleska-Medynskae, 李小年a(
)
收稿日期:2025-07-15
接受日期:2025-09-28
出版日期:2026-02-18
发布日期:2025-12-26
通讯作者:
*电子信箱: lyujh@zjut.edu.cn (吕井辉),xnli@zjut.edu.cn (李小年).
基金资助:
Peikun Lia, Jinghui Lyua(
), Yiyong Zhaoa, Han Wua, Xianghao Zhanga, Qiannan Lua, Yizhi Xiangb, Blaž Likozarc, Matej Hušc,d, Adriana Zaleska-Medynskae, Xiaonian Lia(
)
Received:2025-07-15
Accepted:2025-09-28
Online:2026-02-18
Published:2025-12-26
Contact:
*E-mail: lyujh@zjut.edu.cn (J. Lyu),xnli@zjut.edu.cn (X. Li).
About author:Peikun Li (College of Chemical Engineering, Zhejiang University of Technology (ZJUT)) is currently pursuing his Master’s degree under the supervision of Professor Jinghui Lyu. His research is broadly centered on industrial catalysis, with an emphasis on the rational design and synthesis of advanced catalytic materials, catalytic reaction engineering, and the development of transition metal-based catalytic systems. He has a particular interest in zeolite, single-atom catalysts, and electrocatalytic processes, where he seeks to unravel structure-activity relationships and establish strategies for improving catalytic efficiency, selectivity, and long-term stability.Supported by:摘要:
选择性加氢在诸多化学过程和环境应用中都具有至关重要的作用, 因为在这些反应中, 只有对反应活性和选择性的精准把控, 才能实现高纯度产物的高效制备. 单原子催化剂(SACs)由于其金属位点以原子级分散的独特结构, 能够在一定程度上兼具均相催化和多相催化的优势, 被视为一种具有颠覆性的催化平台. 它们不仅在选择性加氢反应中展现出极高的催化效率和反应选择性, 而且能够大幅减少关键稀缺金属资源的使用, 从而在推动绿色化学和可持续发展方面展现出广阔前景.
本文系统综述了近年来单原子催化剂在选择性加氢反应中的研究进展, 重点分析了其独特的催化特性以及影响催化性能的关键因素. SACs凭借其金属位点以原子级分散的独特结构, 在均相和非均相催化剂之间架起了桥梁, 既兼具均相催化的高选择性, 又保留了非均相催化在分离和稳定性上的优势, 从而成为选择性加氢领域的一个变革性平台. 根据金属单原子位点的不同, 归纳了SACs在选择性加氢中的应用进行, 包括贵金属SACs、非贵金属SACs、双金属SACs以及单原子合金, 它们在炔烃、芳香族化合物、酚类、醛类物质和CO2选择性加氢反应中均表现出优异的性能. 介绍了SACs的发展历史, 总结了多种典型的合成策略与配位环境调控方法, 详细叙述了SACs的原子建模并重点剖析了建模过程中潜在的不确定性来源, 深层挖掘了H2的活化机理, 揭示了单原子位点在氢均裂与异裂机制中的独特作用, 还对不同单金属SACs在多类反应体系中的催化活性与适用范围进行了对比性讨论. 在方法上力求突破单一维度的总结, 提供了一种整体化、多学科交叉的视角, 强调了结构-活性关系、反应机理路径以及前瞻性挑战的重要性. 此外, 特别关注了未来发展中可能面临的挑战, 如何在保持高活性与高选择性的同时实现催化剂结构的可控合成, 如何通过配位环境精细调控进一步优化性能, 以及如何解决规模化制备与工业放大过程中的稳定性与可重复性问题. 本文旨在为可持续催化剂设计提供一幅前瞻性的蓝图, 在这一过程中, SACs不仅展现出在资源高效利用方面的潜力, 也为减少关键稀缺金属的使用、推动绿色化学与清洁能源技术的发展提供了重要契机.
在未来, 推动单原子催化剂实际应用需聚焦五方面: 先进原位表征、可规模化高负载合成、通用多金属载体平台、高通量筛选金属-载体协同效应, 以及可持续前驱体与循环利用策略. 期望这篇综述能够为从事相关研究的化学家和工程师提供深刻的参考资料, 帮助他们在开发高效的单原子催化剂方面取得新的突破.
李沛坤, 吕井辉, 赵以勇, 吴汉, 张祥豪, 陆倩楠, Yizhi Xiang, Blaž Likozar, Matej Huš, Adriana Zaleska-Medynska, 李小年. 迈向高效选择性加氢: 单原子催化剂的作用[J]. 催化学报, 2026, 81: 69-96.
Peikun Li, Jinghui Lyu, Yiyong Zhao, Han Wu, Xianghao Zhang, Qiannan Lu, Yizhi Xiang, Blaž Likozar, Matej Huš, Adriana Zaleska-Medynska, Xiaonian Li. Towards highly efficient selective hydrogenation: The role of single-atom catalysts[J]. Chinese Journal of Catalysis, 2026, 81: 69-96.
Fig. 2. Development of SACs for hydrogenation from 2011 to 2025 [26,39-61]. Reprinted with permission from Ref. [26]. Copyright 2011, Springer nature. Reprinted with permission from Ref. [39]. Copyright 2003, John Wiley and Sons. Reprinted with permission from Ref. [40]. Copyright 2013, John Wiley and Sons. Reprinted with permission from Ref. [41]. Copyright 2014, Springer nature. Reprinted with permission from Ref. [42]. Copyright 2015, American Chemical Society. Reprinted with permission from Ref. [43]. Copyright 2016, John Wiley and Sons. Reprinted with permission from Ref. [44]. Copyright 2017, American Chemical Society. Reprinted with permission from Ref. [46]. Copyright 2018, Springer nature. Reprinted with permission from Ref. [48]. Copyright 2019, American Chemical Society. Reprinted with permission from Ref. [51]. Copyright 2020, Springer nature. Reprinted with permission from Ref. [52]. Copyright 2021, American Chemical Society. Reprinted with permission from Ref. [53]. Copyright 2021, Springer nature. Reprinted with permission from Ref. [54]. Copyright 2023, John Wiley and Sons. Reprinted with permission from Ref. [55]. Copyright 2024, Springer nature. Reprinted with permission from Ref. [56]. Copyright 2025, American Chemical Society. Reprinted with permission from Ref. [57]. Copyright 2020, Elsevier. Reprinted with permission from Ref. [58]. Copyright 2021, Springer nature. Reprinted with permission from Ref. [59]. Copyright 2022, American Chemical Society. Reprinted with permission from Ref. [60]. Copyright 2023, Springer nature. Reprinted with permission from Ref. [61]. Copyright 2024, John Wiley and Sons.
| Preparation method | Advantage | Disadvantag |
|---|---|---|
| Wetness impregnation | simple to operate | metal atoms generally do not achieve uniform dispersion on the surface of the support |
| Ion exchange | enables the synthesis of highly loaded single atoms on the support surface | only applicable for the synthesis of limited types of SACs |
| Co-precipitation | suitable for the preparation of composite oxides with two or more uniformly dispersed metal elements | 1. preparation parameters exert a significant influence on catalyst performance 2. a portion of active atoms remain unexposed and thus cannot participate in catalytic reactions |
| Templated hydrothermal | simple and easy to operate | same as ion exchange |
| Metal leaching | preparation of monodispersed catalysts by a two-step method | 1. only suitable for a limited range of specific metals and support materials 2. the preparation process is associated with environmental pollution |
| Facile adsorption | simple and easy to operate | a proper interaction between the active metal components and the catalyst support is required |
| Strong electrostatic adsorption | suitable for the preparation of high-quality precious metal SACs | the adsorption behavior is influenced by multiple factors |
| Pyrolysis synthesis | facilitates straightforward preparation of SACs | demands a high pyrolysis temperature |
| Ball-milling | simple, scalable production, green | the catalysts are prone to agglomeration |
| Two-step doping | high stability | 1. it is necessary to provide mobile atoms and a support capable of capturing mobile species 2. high-temperature synthesis necessitates a high-energy atom/ion generator |
| Host-guest strategy | 1. strong stabilization of isolated atoms 2. tunable coordination environment | 1. limited to supports with suitable porosity 2. complex synthesis routes |
| Photoreduction | the approach requires no specialized equipment and is straightforward to implement | the catalytic active centers are generally non-uniform |
| Atomic layer deposition | 1. precise manipulation of process parameters 2. superior deposition uniformity and high reproducibility 3. the loading of singly dispersed atoms can be tailored by adjusting the number of deposition cycles | 1. only support materials functionalized with appropriate ligands or functional groups are viable for selection 2. not amenable to large-scale commercial manufacturing |
| Atom trapping | the operation process is simple | same as two-step doping |
| One-pot wet chemistry | 1. no specialized experimental setup or multi-step reaction conditions are required, which is conducive to large-scale production 2. high loading of isolated metal atoms can be achieved | limited by the solubility of different precursors |
| Cyclic voltammetry | less additives are demanded and no interfering products are generated | an electrochemical station is needed and the operation cost is high |
Table 1 Summary of advantages and disadvantages of preparation methods for SACs.
| Preparation method | Advantage | Disadvantag |
|---|---|---|
| Wetness impregnation | simple to operate | metal atoms generally do not achieve uniform dispersion on the surface of the support |
| Ion exchange | enables the synthesis of highly loaded single atoms on the support surface | only applicable for the synthesis of limited types of SACs |
| Co-precipitation | suitable for the preparation of composite oxides with two or more uniformly dispersed metal elements | 1. preparation parameters exert a significant influence on catalyst performance 2. a portion of active atoms remain unexposed and thus cannot participate in catalytic reactions |
| Templated hydrothermal | simple and easy to operate | same as ion exchange |
| Metal leaching | preparation of monodispersed catalysts by a two-step method | 1. only suitable for a limited range of specific metals and support materials 2. the preparation process is associated with environmental pollution |
| Facile adsorption | simple and easy to operate | a proper interaction between the active metal components and the catalyst support is required |
| Strong electrostatic adsorption | suitable for the preparation of high-quality precious metal SACs | the adsorption behavior is influenced by multiple factors |
| Pyrolysis synthesis | facilitates straightforward preparation of SACs | demands a high pyrolysis temperature |
| Ball-milling | simple, scalable production, green | the catalysts are prone to agglomeration |
| Two-step doping | high stability | 1. it is necessary to provide mobile atoms and a support capable of capturing mobile species 2. high-temperature synthesis necessitates a high-energy atom/ion generator |
| Host-guest strategy | 1. strong stabilization of isolated atoms 2. tunable coordination environment | 1. limited to supports with suitable porosity 2. complex synthesis routes |
| Photoreduction | the approach requires no specialized equipment and is straightforward to implement | the catalytic active centers are generally non-uniform |
| Atomic layer deposition | 1. precise manipulation of process parameters 2. superior deposition uniformity and high reproducibility 3. the loading of singly dispersed atoms can be tailored by adjusting the number of deposition cycles | 1. only support materials functionalized with appropriate ligands or functional groups are viable for selection 2. not amenable to large-scale commercial manufacturing |
| Atom trapping | the operation process is simple | same as two-step doping |
| One-pot wet chemistry | 1. no specialized experimental setup or multi-step reaction conditions are required, which is conducive to large-scale production 2. high loading of isolated metal atoms can be achieved | limited by the solubility of different precursors |
| Cyclic voltammetry | less additives are demanded and no interfering products are generated | an electrochemical station is needed and the operation cost is high |
Fig. 3. (a) HAADF-STEM image of 0.08% Pt/FeOx-R200. Reprinted with permission from Ref. [41]. Copyright 2014, Springer nature. (b) STM image of 0.02 ML Pt/Cu (111) SAA surface. Reprinted with permission from Ref. [77]. Copyright 2014, Springer nature. (c) Schematic illustration of the 0.2Pt/m-Al2O3-H2 synthesis process. Reprinted with permission from Ref. [78]. Copyright 2017, Springer nature. (d) Schematic synthetic illustration for constructing single-atom Pd supported on nanoscale TiO2. Reprinted with permission from Ref. [79]. Copyright 2020, Springer nature.
Fig. 4. (a) Promising candidates at different temperatures are highlighted in the figure. Reprinted with permission from Ref. [98]. Copyright 2021, Springer nature. (b) Stability of SAAs relative to competing configurations. Reprinted with permission from Ref. [99]. Copyright 2020, Springer nature. (c) Trapping energies of metal atoms, defined as the difference in the binding energies at the point defects and the ideal graphene or h-BN. Reprinted with permission from Ref. [102]. Copyright 2014, American Chemical Society.
Fig. 5. Two representative H2 activation pathways: homolytic and heterolytic dissociation of H2. Reprinted with permission from Ref. [107]. Copyright 2021, American Chemical Society.
Fig. 6. (a) Design scheme to promote homolysis of H2. Reprinted with permission from Ref. [111]. Copyright 2014, American Chemical Society. (b) Model of Pd1/C3N4 catalytic dechlorination of 4-chlorophenol. Reprinted with permission from Ref. [114]. Copyright 2020, American Chemical Society. (c) Model diagram of activation of hydrogen molecules catalyzed by Pt@Y. Reprinted with permission from Ref. [115]. Copyright 2021, American Chemical Society.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | TOF (h‒1) | Ref. |
|---|---|---|---|---|---|---|---|---|
| Pd1/TiO2 | acetylene | ethylene | 120 | 1 | 100 | 65 | — | [ |
| Pd1-N8/CNT | acetylene | ethylene | 40 | 1 | 83 | 98 | 1998 | [ |
| Pd1/CeO2 | acetylene | ethylene | 150 | 1 | 90 | 80.6 | — | [ |
| Z@Pd1@Z | acetylene | ethylene | 120 | 1 | 100 | 98.3 | — | [ |
| Pd1/SiO2-NH2 | acetylene | ethylene | 190 | 1 | 100 | 92 | 18451.2 | [ |
| Pd/PPh3-COF | acetylene | ethylene | 80 | 1 | 90 | 95 | 86.4 | [ |
| Pd1/G | phenylacetylene | styrene | 25 | 1 | 100 | 94 | 267 | [ |
| Pd1/Ni@G | phenylacetylene | styrene | 30 | 2 | 100 | 93 | 7074 | [ |
| Pd1/NC-PHF | phenylacetylene | styrene | 60 | 5 | 93.1 | 93.5 | 139.1 | [ |
| Pd0.2/TiO2 | phenylacetylene | styrene | 25 | 10 | 99 | 91 | 8596 | [ |
| Pd1+Pdn@NC/HAP | 2-methyl-3-butyn-2-ol | 2-methyl-3-buten-2-ol | 30 | 1 | 99 | 97.2 | 3707.7 | [ |
| Pd1/TiO2 | acetophenone | 1-phenylethanol | 60 | 5 | 99.9 | 97.4 | 1571 | [ |
| Pd1/α-MOC | 4-nitrochlorobenzene | 4-chloroaniline | 60 | 5 | 100 | 99 | 2280 | [ |
| Pd/CHT-800 | phenol | cyclohexanone | 170 | 10 | 100 | 99.9 | 213.1 | [ |
| Pd1/TiO2 | 4-chlorophenol | cyclohexanone | 25 | 1 | 100 | 95.63 | 95.05 | [ |
| Pd1/CeO2 | 4-chlorophenol | phenol | 25 | 1 | 100 | 47.1 | 4.1 | [ |
| Pd1/rGO | 4-chlorophenol | phenol | 25 | 1 | — | 100 | — | [ |
| Pd1/C3N4 | 4-chlorophenol | phenol | 90 | 1 | 99 | 99 | 146 | [ |
| furfural | furfuryl alcohol | 80 | 1 | 64 | 99 | 13333 | ||
| Pd1/α-MOC | furfural | furfuryl alcohol | 80 | 10 | 96.7 | 92.4 | — | [ |
| Pd1/SAPO-31 | vanillin | vanillyl alcohol | 80 | 1 | 99 | 99 | 3000 | [ |
| Pd1/h-BN | cinnamaldehyde | cinnamyl alcohol | 50 | 1 | 99 | 93 | 1112 | [ |
| Pt1@Y | cinnamaldehyde | cinnamyl alcohol | 130 | 30 | 100 | 92 | — — | [ |
| 2-nitrochlorobenzene | 2-chloroaniline | 100 | 20 | 100 | 99 | |||
| Pt/FeOxHy | propyne | propylene | 120 | 1 | — | 94.1 | 9.4×105 | [ |
| Pt1/TiO2-600 | p-chloronitrobenzene | p-chloroaniline | 80 | 15 | 100 | 99 | — | [ |
| Pt1/CoAlOx | furfural | furfuryl alcohol | 25 | 1 | 100 | 99 | — | [ |
| Pt1/Ti3C2Tx | formaldehyde | methanol | 25 | 1 | 30.7 | 95.8 | — | [ |
| Pt1/CeO2 | nitroarene | aromatic amines | 70 | 1 | 45.4 | 99.7 | 198 | [ |
| Pt1/NC | nitroarene | aromatic amines | 30 | 10 | 99 | 99 | 9428.1 | [ |
| Pt1/TiO2 | m-cresol | m-xylene | 350 | 1 | 15 | — | 1 | [ |
| Pt1/TiO2 | CO2 | CO | 350 | 1 | 7.5 | 100 | 15 | [ |
| Rh1CaAl-LDH | quinoline | 1,2,3,4-tetrahydroquinoline | 80 | 20 | 100 | 99 | 246 | [ |
| 1Na-Rh/ZrO2 | CO2 | methyl formate | 300 | 10 | 62 | 99 | 9.4 | [ |
| Rh1/TiO2@C2NH2PA | CO2 | CO | 250 | 1 | 21 | 100 | 1020 | [ |
| Rh1/TiO2 | CO2 | CO | 500 | 1 | 3 | 96 | — | [ |
| Rh1/CeTiOx | CO2 | ethanol | 250 | 30 | 6.3 | 99.1 | 493.1 | [ |
| Ru1/In2O3-F | CO2 | methanol | 290 | 50 | 12.9 | 74.02 | 671.4 | [ |
| 0.6Ru-IPPPF6 | CO2 | methyl formate | 120 | 30 | 25 | 99 | 166.7 | [ |
| Ru1N3 | CO2 | CH4 | 150 | 1 | 30 | 95 | — | [ |
| CO | 99 | |||||||
| Ru/CeO2-S | aromatics | cyclohexanols | 200 | 10 | 99.9 | 92.1 | 336.6 | [ |
| Ru1/CeO2 | nitrobenzene | aniline | 120 | 20 | 17.9 | 88.2 | — | [ |
| Ir1+np/CMK | quinoline | 1,2,3,4-tetrahydroquinoline | 100 | 20 | — | 99 | 7800 | [ |
Table 2 The performance of noble metal SACs in selective hydrogenation reactions.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | TOF (h‒1) | Ref. |
|---|---|---|---|---|---|---|---|---|
| Pd1/TiO2 | acetylene | ethylene | 120 | 1 | 100 | 65 | — | [ |
| Pd1-N8/CNT | acetylene | ethylene | 40 | 1 | 83 | 98 | 1998 | [ |
| Pd1/CeO2 | acetylene | ethylene | 150 | 1 | 90 | 80.6 | — | [ |
| Z@Pd1@Z | acetylene | ethylene | 120 | 1 | 100 | 98.3 | — | [ |
| Pd1/SiO2-NH2 | acetylene | ethylene | 190 | 1 | 100 | 92 | 18451.2 | [ |
| Pd/PPh3-COF | acetylene | ethylene | 80 | 1 | 90 | 95 | 86.4 | [ |
| Pd1/G | phenylacetylene | styrene | 25 | 1 | 100 | 94 | 267 | [ |
| Pd1/Ni@G | phenylacetylene | styrene | 30 | 2 | 100 | 93 | 7074 | [ |
| Pd1/NC-PHF | phenylacetylene | styrene | 60 | 5 | 93.1 | 93.5 | 139.1 | [ |
| Pd0.2/TiO2 | phenylacetylene | styrene | 25 | 10 | 99 | 91 | 8596 | [ |
| Pd1+Pdn@NC/HAP | 2-methyl-3-butyn-2-ol | 2-methyl-3-buten-2-ol | 30 | 1 | 99 | 97.2 | 3707.7 | [ |
| Pd1/TiO2 | acetophenone | 1-phenylethanol | 60 | 5 | 99.9 | 97.4 | 1571 | [ |
| Pd1/α-MOC | 4-nitrochlorobenzene | 4-chloroaniline | 60 | 5 | 100 | 99 | 2280 | [ |
| Pd/CHT-800 | phenol | cyclohexanone | 170 | 10 | 100 | 99.9 | 213.1 | [ |
| Pd1/TiO2 | 4-chlorophenol | cyclohexanone | 25 | 1 | 100 | 95.63 | 95.05 | [ |
| Pd1/CeO2 | 4-chlorophenol | phenol | 25 | 1 | 100 | 47.1 | 4.1 | [ |
| Pd1/rGO | 4-chlorophenol | phenol | 25 | 1 | — | 100 | — | [ |
| Pd1/C3N4 | 4-chlorophenol | phenol | 90 | 1 | 99 | 99 | 146 | [ |
| furfural | furfuryl alcohol | 80 | 1 | 64 | 99 | 13333 | ||
| Pd1/α-MOC | furfural | furfuryl alcohol | 80 | 10 | 96.7 | 92.4 | — | [ |
| Pd1/SAPO-31 | vanillin | vanillyl alcohol | 80 | 1 | 99 | 99 | 3000 | [ |
| Pd1/h-BN | cinnamaldehyde | cinnamyl alcohol | 50 | 1 | 99 | 93 | 1112 | [ |
| Pt1@Y | cinnamaldehyde | cinnamyl alcohol | 130 | 30 | 100 | 92 | — — | [ |
| 2-nitrochlorobenzene | 2-chloroaniline | 100 | 20 | 100 | 99 | |||
| Pt/FeOxHy | propyne | propylene | 120 | 1 | — | 94.1 | 9.4×105 | [ |
| Pt1/TiO2-600 | p-chloronitrobenzene | p-chloroaniline | 80 | 15 | 100 | 99 | — | [ |
| Pt1/CoAlOx | furfural | furfuryl alcohol | 25 | 1 | 100 | 99 | — | [ |
| Pt1/Ti3C2Tx | formaldehyde | methanol | 25 | 1 | 30.7 | 95.8 | — | [ |
| Pt1/CeO2 | nitroarene | aromatic amines | 70 | 1 | 45.4 | 99.7 | 198 | [ |
| Pt1/NC | nitroarene | aromatic amines | 30 | 10 | 99 | 99 | 9428.1 | [ |
| Pt1/TiO2 | m-cresol | m-xylene | 350 | 1 | 15 | — | 1 | [ |
| Pt1/TiO2 | CO2 | CO | 350 | 1 | 7.5 | 100 | 15 | [ |
| Rh1CaAl-LDH | quinoline | 1,2,3,4-tetrahydroquinoline | 80 | 20 | 100 | 99 | 246 | [ |
| 1Na-Rh/ZrO2 | CO2 | methyl formate | 300 | 10 | 62 | 99 | 9.4 | [ |
| Rh1/TiO2@C2NH2PA | CO2 | CO | 250 | 1 | 21 | 100 | 1020 | [ |
| Rh1/TiO2 | CO2 | CO | 500 | 1 | 3 | 96 | — | [ |
| Rh1/CeTiOx | CO2 | ethanol | 250 | 30 | 6.3 | 99.1 | 493.1 | [ |
| Ru1/In2O3-F | CO2 | methanol | 290 | 50 | 12.9 | 74.02 | 671.4 | [ |
| 0.6Ru-IPPPF6 | CO2 | methyl formate | 120 | 30 | 25 | 99 | 166.7 | [ |
| Ru1N3 | CO2 | CH4 | 150 | 1 | 30 | 95 | — | [ |
| CO | 99 | |||||||
| Ru/CeO2-S | aromatics | cyclohexanols | 200 | 10 | 99.9 | 92.1 | 336.6 | [ |
| Ru1/CeO2 | nitrobenzene | aniline | 120 | 20 | 17.9 | 88.2 | — | [ |
| Ir1+np/CMK | quinoline | 1,2,3,4-tetrahydroquinoline | 100 | 20 | — | 99 | 7800 | [ |
Fig. 7. (a) Ethylene selectivity as a function of temperature for acetylene semi-hydrogenation over Pd/TiO2-200H and Pd/TiO2-600H. Reprinted with permission from Ref. [116]. Copyright 2022, Springer nature. (b) Ethylene selectivity as a function of temperature for selective hydrogenation of acetylene in excess ethylene over different samples. Reprinted with permission from Ref. [118]. Copyright 2022, Springer nature. (c) Magnetic property test for Pd1/Ni@G with an external magnetic field. Reprinted with permission from Ref. [123]. Copyright 2022, John Wiley and Sons. (d) The cycle performance of Pd1/NC-PHF. Reprinted with permission from Ref. [124]. Copyright 2023, Elsevier.
Fig. 8. (a) Comparison of the activities of Pd1/TiO2 and Pdn/TiO2 at different temperatures. Reprinted with permission from Ref. [126]. Copyright 2023, American Chemical Society. (b) Conversion and product selectivity over various Pd-containing catalysts. Reprinted with permission from Ref. [127]. Copyright 2020, John Wiley and Sons. (c) The yield and selectivity of CYC via reaction time. Reprinted with permission from Ref. [129]. Copyright 2025, Elsevier. (d) Illustrates electron density differences, activation energy, and migration energy of hydrogen on different models about Pd SACs. Reprinted with permission from Ref. [132]. Copyright 2024, John Wiley and Sons.
Fig. 9. (a) The hydrogenation of various halogenated nitrobenzenes over Pt1/TiO2-600. Reprinted with permission from Ref. [136]. Copyright 2024, John Wiley and Sons. (b) Reaction mechanism of FAL hydrogenation to FOL or THFOL over Pt1/CoAlOx or Ptn/CoAlOx, respectively. Reprinted with permission from Ref. [137]. Copyright 2023, American Chemical Society. (c) Conversion and selectivity of trans-β-nitrostyrene hydrogenation over Pt1/CeO2 catalyst in recycling tests. Reprinted with permission from Ref. [139]. Copyright 2022, Springer nature. (d) A schematic illustration of the regulation of Rh1-ZrO2 cooperativity by Na ions for selectivity tuning. Reprinted with permission from Ref. [144]. Copyright 2023, John Wiley and Sons. (e) CO2 conversion and product distribution. Reprinted with permission from Ref. [145]. Copyright 2023, American Chemical Society. (f) Selective hydrogenation reaction equation for dearomatization of aromatics. Reprinted with permission from Ref. [147]. Copyright 2022, John Wiley and Sons.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | TOF (h‒1) | Ref. |
|---|---|---|---|---|---|---|---|---|
| Co1/@Y | acetylene | ethylene | 220 | 1 | 90 | 93 | — | [ |
| Co-N4P1 | halonitrobenzene | haloanilines | 80 | 5 | 83.2 | 99 | — | [ |
| Co3N4-S | p-chloronitrobenzene | p-chloroaniline | 80 | 10 | 94.5 | 90.7 | — | [ |
| Co1/NC | nitrocompounds | aminocompounds | 100 | 5 | 100 | 100 | — | [ |
| Co/SBA-15 | CO2 | CO | 600 | 1 | 37 | 99 | 304.6 | [ |
| Co/C-PAQ | nitrobenzene | aniline | 80 | 10 | 99 | 99 | 398 | [ |
| Co1/Con@NCNS | nitroarenes | aromatic amines | 50 | 10 | 99 | 99 | — | [ |
| Co-NAC | nitroarenes | aromatic amines | 80 | 20 | 99 | 99 | 19.7 | [ |
| Co1/NPC | nitroarenes | aromatic amines | 110 | 30 | 99 | 99 | 6560 | [ |
| Co1-N/P-C | p-chloronitrobenzene | p-chloroaniline | 100 | 20 | 99 | 99 | 241.5 | [ |
| Co1/NC | nitrobenzene | aniline | 110 | 30 | 99.7 | 99.1 | 76.8 | [ |
| Co@Nx-C-800 | nitroarenes | aromatic amines | 120 | 15 | 100 | 99 | 317.7 | [ |
| Co-N4/TiN-rGO | 4-nitrophenol | 4-aminophenol | 25 | 1 | 99 | 99 | — | [ |
| Co1@NC-(SBA) | vanillin | vanillyl alcohol | 140 | 10 | 100 | 99.2 | — | [ |
| p-nitrochlorobenzene | p-chloroaniline | 90 | 10 | 100 | 99 | — | ||
| Co1@NHOPC | quinoline | 1,2,3,4-tetrahydroquinoline | 100 | 20 | 100 | 99 | — | [ |
| Cu1/CN/TiO2 | quinoline | 1,2,3,4-tetrahydroquinoline | 60 | 1 | 94 | 99 | 104 | [ |
| Cu1/NC | acetylene | ethylene | 25 | 1 | — | 97 | — | [ |
| Cu1/CN | phenylacetylene | styrene | 70 | 1 | 94 | 99 | 74 | [ |
| Cu1/TiO2 | 2-butyne-1,4-diol | 2-butene-1,4-diol | 25 | 1 | 100 | 99.4 | — | [ |
| Fe-ZIF-800 | furfural | furfuryl alcohol | 120 | 1 | 99.5 | 96.9 | 1882 | [ |
| Fe-N/S-C | nitroarenes | aromatic amines | 25 | 1 | 100 | 99 | 116.9 | [ |
| Fe1/N-C | nitroarenes | aromatic amines | 60 | 1 | 100 | 99 | 748 | [ |
| Fe1/N-C | nitrobenzene | aniline | 160 | 5 | 99 | 99 | — | [ |
| Mo/NC | CO2 | CO | 500 | 0.69 | 30.4 | 100 | 80 | [ |
| Ni1/Bi3O4Br | CO2 | CH4 | 40 | 0.95 | — | 95.1 | — | [ |
| Ni1-Nix/Cv | acetylene | ethylene | 240 | 1 | 95.26 | 93.5 | — | [ |
| Ni1-N3/C | acetylene | ethylene | 220 | 1 | 100 | 94 | — | [ |
| Ni SAs-N@LC | vanillin | vanillyl alcohol | 180 | 1 | 98.93 | 97.3 | — | [ |
| Ni1/TiO2 | cinnamaldehyde | cinnamyl alcohol | 130 | 30 | 98 | 90 | 102 | [ |
| Ni1@Beta | furfural | furfuryl alcohol | 110 | 10 | 93.7 | 97.5 | 114.1 | [ |
| Ni1/NC | furfural | furfuryl alcohol | 100 | 1 | 99 | 99 | 2908.1 | [ |
Table 3 The performance of non-noble metal SACs in selective hydrogenation reactions.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | TOF (h‒1) | Ref. |
|---|---|---|---|---|---|---|---|---|
| Co1/@Y | acetylene | ethylene | 220 | 1 | 90 | 93 | — | [ |
| Co-N4P1 | halonitrobenzene | haloanilines | 80 | 5 | 83.2 | 99 | — | [ |
| Co3N4-S | p-chloronitrobenzene | p-chloroaniline | 80 | 10 | 94.5 | 90.7 | — | [ |
| Co1/NC | nitrocompounds | aminocompounds | 100 | 5 | 100 | 100 | — | [ |
| Co/SBA-15 | CO2 | CO | 600 | 1 | 37 | 99 | 304.6 | [ |
| Co/C-PAQ | nitrobenzene | aniline | 80 | 10 | 99 | 99 | 398 | [ |
| Co1/Con@NCNS | nitroarenes | aromatic amines | 50 | 10 | 99 | 99 | — | [ |
| Co-NAC | nitroarenes | aromatic amines | 80 | 20 | 99 | 99 | 19.7 | [ |
| Co1/NPC | nitroarenes | aromatic amines | 110 | 30 | 99 | 99 | 6560 | [ |
| Co1-N/P-C | p-chloronitrobenzene | p-chloroaniline | 100 | 20 | 99 | 99 | 241.5 | [ |
| Co1/NC | nitrobenzene | aniline | 110 | 30 | 99.7 | 99.1 | 76.8 | [ |
| Co@Nx-C-800 | nitroarenes | aromatic amines | 120 | 15 | 100 | 99 | 317.7 | [ |
| Co-N4/TiN-rGO | 4-nitrophenol | 4-aminophenol | 25 | 1 | 99 | 99 | — | [ |
| Co1@NC-(SBA) | vanillin | vanillyl alcohol | 140 | 10 | 100 | 99.2 | — | [ |
| p-nitrochlorobenzene | p-chloroaniline | 90 | 10 | 100 | 99 | — | ||
| Co1@NHOPC | quinoline | 1,2,3,4-tetrahydroquinoline | 100 | 20 | 100 | 99 | — | [ |
| Cu1/CN/TiO2 | quinoline | 1,2,3,4-tetrahydroquinoline | 60 | 1 | 94 | 99 | 104 | [ |
| Cu1/NC | acetylene | ethylene | 25 | 1 | — | 97 | — | [ |
| Cu1/CN | phenylacetylene | styrene | 70 | 1 | 94 | 99 | 74 | [ |
| Cu1/TiO2 | 2-butyne-1,4-diol | 2-butene-1,4-diol | 25 | 1 | 100 | 99.4 | — | [ |
| Fe-ZIF-800 | furfural | furfuryl alcohol | 120 | 1 | 99.5 | 96.9 | 1882 | [ |
| Fe-N/S-C | nitroarenes | aromatic amines | 25 | 1 | 100 | 99 | 116.9 | [ |
| Fe1/N-C | nitroarenes | aromatic amines | 60 | 1 | 100 | 99 | 748 | [ |
| Fe1/N-C | nitrobenzene | aniline | 160 | 5 | 99 | 99 | — | [ |
| Mo/NC | CO2 | CO | 500 | 0.69 | 30.4 | 100 | 80 | [ |
| Ni1/Bi3O4Br | CO2 | CH4 | 40 | 0.95 | — | 95.1 | — | [ |
| Ni1-Nix/Cv | acetylene | ethylene | 240 | 1 | 95.26 | 93.5 | — | [ |
| Ni1-N3/C | acetylene | ethylene | 220 | 1 | 100 | 94 | — | [ |
| Ni SAs-N@LC | vanillin | vanillyl alcohol | 180 | 1 | 98.93 | 97.3 | — | [ |
| Ni1/TiO2 | cinnamaldehyde | cinnamyl alcohol | 130 | 30 | 98 | 90 | 102 | [ |
| Ni1@Beta | furfural | furfuryl alcohol | 110 | 10 | 93.7 | 97.5 | 114.1 | [ |
| Ni1/NC | furfural | furfuryl alcohol | 100 | 1 | 99 | 99 | 2908.1 | [ |
Fig. 10. (a) Ethylene selectivity as a function of temperature of Co1@Y and Co/Y under the same reaction conditions. (b) Reaction mechanism of acetylene selective hydrogenation over Co1@Y. Reprinted with permission from Ref. [56]. Copyright 2025, American Chemical Society. (c) The catalytic performance of various catalysts for the p-NB selective hydrogenation. Reprinted with permission from Ref. [61]. Copyright 2024, John Wiley and Sons. (d) Catalytic performance of various Co-SACs in the hydrogenation of p-CNB under H2 atmospheres. Reprinted with permission from Ref. [164]. Copyright 2024, American Chemical Society. (e) Hydrogenation activity test of Co1/NC, Co/NC, and NC. Reprinted with permission from Ref. [55]. Copyright 2024, Springer nature. (f) Stability of Co/SBA-15. Reprinted with permission from Ref. [165]. Copyright 2022, Elsevier.
Fig. 11. (a) Proposed mechanism for heterolytic cleavage of H2 via the proticsolvent-mediated H-shuttling mechanism on the homogeneous catalyst and Co/C-PAQ. Reprinted with permission from Ref. [166]. Copyright 2022, American Chemical Society. (b) Catalytic results of the 3-nitrostyrene hydrogenation over Co-100-NAC in the presence of S-containing reagents. Reprinted with permission from Ref. [168]. Copyright 2022, Springer nature. (c) Electron-density isosurface of Co atoms in two models. Blue: positive, red: negative. Reprinted with permission from Ref. [169]. Copyright 2022, Springer nature. (d) Catalytic performance of N/P-C, Co1-N-C, Co1-N/P-C, and Pt/C for p-CNB hydrogenation. Reprinted with permission from Ref. [170]. Copyright 2024, Elsevier. (e) Effect of water on the selective hydrogenation of nitrobenzene over Co SAs/NC. Reprinted with permission from Ref. [171]. Copyright 2020, American Chemical Society.
Fig. 12. (a) Long-term stability of Cu SA/NC at a current density load of ?100 mA cm?2 and the corresponding FEs of C2H4, C4H6 and H2. Reprinted with permission from Ref. [54]. Copyright 2023, John Wiley and Sons. (b) Recycling test of Cu1/CN/Al2O3 for transfer hydrogenation of phenylacetylene. Reprinted with permission from Ref. [177]. Copyright 2010, Royal Society of Chemistry. (c) Schematic illustration of the photocatalytic BYD semi-hydrogenation path on Cu-SAs-TiO2. Reprinted with permission from Ref. [178]. Copyright 2025, American Chemical Society.
Fig. 13. (a) Bader charge transfer numbers of Fe-N3S1 and Fe-N4. Reprinted with permission from Ref. [179]. Copyright 2025, Elsevier. (b) Energy profiles of the hydrogenation from PhNO2 to PhNH2 on Fe-N4. Reprinted with permission from Ref. [180]. Copyright 2019, American Chemical Society. (c) TOF and production distribution of Mo/NC catalysts versus Mo loading. Reprinted with permission from Ref. [182]. Copyright 2022, John Wiley and Sons. (d) Performance comparison of different heterogeneous catalysts for the selective hydrogenation of cinnamaldehyde. Reprinted with permission from Ref. [187]. Copyright 2022, John Wiley and Sons.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | Ref. |
|---|---|---|---|---|---|---|---|
| Cu1Aun/NU-1000 | CO2 | C2H6 | 25 | 1 | 69.9 | 71.1 | [ |
| Co1Cu1/PHI | CO2 | formic acid | 300 | 35 | — | 75 | [ |
| Zn1Pdn/OC/Al2O3 | p-iodonitrobenzene | p-iodoaniline | 80 | 1 | 94 | 100 | [ |
| Ru1Nin/CNT | cinnamaldehyde | cinnamyl alcohol | 160 | 20 | 74.1 | 90 | [ |
| Pdn/Ni1@γ-Al2O3 | phenylacetylene | styrene | 25 | 1 | 98 | 94 | [ |
| Cu1Ptn | epichlorohydrin | 3-chloro-1-propanol | 90 | 40 | 98 | 92 | [ |
| Pd1Cu1/ND@G | acetylene | ethylene | 110 | 1 | 100 | 92 | [ |
| Ru1Cun/SiO2 | acetylene | ethylene | 170 | 1 | 100 | 97.6 | [ |
| Ag1Cu1-C3N4 | alkyne | olefin | 25 | 1 | 99 | 99 | [ |
| h-Pd1Mn1/NC | phenylacetylene | styrene | 60 | 15 | 99 | 95 | [ |
| PdRu-ZPO | phenylacetylene | styrene | 60 | 20 | 97 | 91 | [ |
| Ir1Mo1/TiO2 | 4-nitrostyrene | 4-aminostyrene | 120 | 20 | 100 | 96.3 | [ |
| Ni0.5Co0.5-MOF | 4-chloronitrobenzene | 4-chloroaniline | 25 | 1 | 99.9 | 99.1 | [ |
| Pt1Fe1/ND | p-nitrochlorobenzene | p-chloroaniline | 80 | 10 | 100 | 99 | [ |
| Pt1Co1-CeO2 | CO2 | CO | 400 | 1 | 22.5 | 98.5 | [ |
| Pt1Ni1-CeO2 | 16 | 96.5 |
Table 4 The performance of bimetallic SACs in selective hydrogenation reactions.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | Ref. |
|---|---|---|---|---|---|---|---|
| Cu1Aun/NU-1000 | CO2 | C2H6 | 25 | 1 | 69.9 | 71.1 | [ |
| Co1Cu1/PHI | CO2 | formic acid | 300 | 35 | — | 75 | [ |
| Zn1Pdn/OC/Al2O3 | p-iodonitrobenzene | p-iodoaniline | 80 | 1 | 94 | 100 | [ |
| Ru1Nin/CNT | cinnamaldehyde | cinnamyl alcohol | 160 | 20 | 74.1 | 90 | [ |
| Pdn/Ni1@γ-Al2O3 | phenylacetylene | styrene | 25 | 1 | 98 | 94 | [ |
| Cu1Ptn | epichlorohydrin | 3-chloro-1-propanol | 90 | 40 | 98 | 92 | [ |
| Pd1Cu1/ND@G | acetylene | ethylene | 110 | 1 | 100 | 92 | [ |
| Ru1Cun/SiO2 | acetylene | ethylene | 170 | 1 | 100 | 97.6 | [ |
| Ag1Cu1-C3N4 | alkyne | olefin | 25 | 1 | 99 | 99 | [ |
| h-Pd1Mn1/NC | phenylacetylene | styrene | 60 | 15 | 99 | 95 | [ |
| PdRu-ZPO | phenylacetylene | styrene | 60 | 20 | 97 | 91 | [ |
| Ir1Mo1/TiO2 | 4-nitrostyrene | 4-aminostyrene | 120 | 20 | 100 | 96.3 | [ |
| Ni0.5Co0.5-MOF | 4-chloronitrobenzene | 4-chloroaniline | 25 | 1 | 99.9 | 99.1 | [ |
| Pt1Fe1/ND | p-nitrochlorobenzene | p-chloroaniline | 80 | 10 | 100 | 99 | [ |
| Pt1Co1-CeO2 | CO2 | CO | 400 | 1 | 22.5 | 98.5 | [ |
| Pt1Ni1-CeO2 | 16 | 96.5 |
Fig. 15. (a) Schematic illustration of the tannic acid coating-confinement strategy. Reprinted with permission from Ref. [193]. Copyright 2022, John Wiley and Sons. (b) Stability cyclic test of Pd0.5/Ni0.5@γ-Al2O3. Reprinted with permission from Ref. [194]. Copyright 2023, Elsevier. (c) Schematic illustration of possible reaction pathway for the catalytic hydrogenation of epichlorohydrin. Reprinted with permission from Ref. [196]. Copyright 2023, Elsevier.
Fig. 16. (a) C2H2 conversion rate and C2H4 selectivity as a function of temperature over Pd1Cu1 DSAC. Reprinted with permission from Ref. [197]. Copyright 2022, American Chemical Society. (b) Stability test of h-Pd-Mn/NC. Reprinted with permission from Ref. [200]. Copyright 2024, American Chemical Society. (c) Pd/Ru ratio dependence of the conversion and selectivity of the phenylacetylene semi-hydrogenation. Reprinted with permission from Ref. [201]. Copyright 2021, Royal Society of Chemistry. (d) Schematic illustration of the construction of 2D NiCo-MOF bimetallic nanosheets for selective reduction of nitroarenes. Reprinted with permission from Ref. [202]. Copyright 2014, Royal Society of Chemistry. (e) dual single-atoms on CeO2?x support. Reprinted with permission from Ref. [204]. Copyright 2025, Elsevier.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | Ref. |
|---|---|---|---|---|---|---|---|
| Pd1Au | 1-hexyne | 1-hexene | 100 | 0.2 | 10.6 | 98 | [ |
| Pd1/NiGa | acetylene | ethylene | 110 | 1 | 100 | 95 | [ |
| propyne | propylene | 110 | 1 | 95 | 98 | ||
| Pd1Fe | phenylacetylene | styrene | 25 | 1 | 99.9 | 96 | [ |
| Pd1Ni/SiO2 | acetylene | ethylene | 80 | 1 | 100 | 88 | [ |
| Pd1/Cu | 1,3-butadiene | 1-butene | 106.9 | 0.01 | 100 | 84 | [ |
| Ru1Ni | 4-nitrostyrene | 4-aminostyrene | 60 | 10 | 100 | 99 | [ |
| Ir1Ni | 4-nitrostyrene | 4-aminostyrene | 50 | 10 | 100 | 98 | [ |
| IrCu1/C | p-bromonitrobenzene | p-bromoaniline | 80 | 10 | 100 | 99 | [ |
| Pd1Ag10/Al2O3 | diphenylacetylene | cis-stilbene | 25 | 5 | 100 | 99 | [ |
| CuPd1/Al2O3 | furfural | furfuryl alcohol | 220 | 1 | 99.9 | 81 | [ |
| Pd1Cu/Al2O3 | furfural | furfuryl alcohol | 50 | 1.5 | 40.1 | 99.1 | [ |
| Pt1Cu | furfural | furfuryl alcohol | 50 | 20 | 100 | 99 | [ |
| Ru1Cu | 5-hydroxymethylfurfural | 5-hydroxymethylfurfuryl alcohol | 25 | 1 | 65.9 | 89.4 | [ |
| Pt1/Co | 5-hydroxymethylfurfural | 5-hydroxymethylfurfuryl alcohol | 180 | 10 | 100 | 92.9 | [ |
| Pd1Cu | crotonaldehyde | crotyl alcohol | 50 | 1.5 | 99 | 84.3 | [ |
Table 5 The performance of SAAs in selective hydrogenation reactions.
| Catalyst | Reactant | Product | T (°C) | P (bar) | Conv. (%) | Sel. (%) | Ref. |
|---|---|---|---|---|---|---|---|
| Pd1Au | 1-hexyne | 1-hexene | 100 | 0.2 | 10.6 | 98 | [ |
| Pd1/NiGa | acetylene | ethylene | 110 | 1 | 100 | 95 | [ |
| propyne | propylene | 110 | 1 | 95 | 98 | ||
| Pd1Fe | phenylacetylene | styrene | 25 | 1 | 99.9 | 96 | [ |
| Pd1Ni/SiO2 | acetylene | ethylene | 80 | 1 | 100 | 88 | [ |
| Pd1/Cu | 1,3-butadiene | 1-butene | 106.9 | 0.01 | 100 | 84 | [ |
| Ru1Ni | 4-nitrostyrene | 4-aminostyrene | 60 | 10 | 100 | 99 | [ |
| Ir1Ni | 4-nitrostyrene | 4-aminostyrene | 50 | 10 | 100 | 98 | [ |
| IrCu1/C | p-bromonitrobenzene | p-bromoaniline | 80 | 10 | 100 | 99 | [ |
| Pd1Ag10/Al2O3 | diphenylacetylene | cis-stilbene | 25 | 5 | 100 | 99 | [ |
| CuPd1/Al2O3 | furfural | furfuryl alcohol | 220 | 1 | 99.9 | 81 | [ |
| Pd1Cu/Al2O3 | furfural | furfuryl alcohol | 50 | 1.5 | 40.1 | 99.1 | [ |
| Pt1Cu | furfural | furfuryl alcohol | 50 | 20 | 100 | 99 | [ |
| Ru1Cu | 5-hydroxymethylfurfural | 5-hydroxymethylfurfuryl alcohol | 25 | 1 | 65.9 | 89.4 | [ |
| Pt1/Co | 5-hydroxymethylfurfural | 5-hydroxymethylfurfuryl alcohol | 180 | 10 | 100 | 92.9 | [ |
| Pd1Cu | crotonaldehyde | crotyl alcohol | 50 | 1.5 | 99 | 84.3 | [ |
Fig. 17. (a) Schematic representation of the course of 1-hexyne hydrogenation. Reprinted with permission from Ref. [205]. Copyright 2022, American Chemical Society. (b) high-resolution AC-HAADF-STEM image of RuNi SAA catalyst. (c) Reusability tests of Ru1Ni catalyst within five successive catalytic cycles. Reprinted with permission from Ref. [210]. Copyright 2022, Springer nature. (d) Reusability tests of Ir1Ni catalyst within five successive catalytic cycles. Reprinted with permission from Ref. [211]. Copyright 2024, John Wiley and Sons.
Fig. 18. (a) Reaction pathway of the conversion of FF to 2-MF on Cu8Pd1/Al2O3 catalyst. Reprinted with permission from Ref. [214]. Copyright 2025, John Wiley and Sons. (b) The reaction profiles of furfural conversion and selectivity [215]. Reprinted with permission from Ref. [215]. Copyright 2021, Elsevier. (c) Reactivity of the PtCu catalysts used at 20 bar. Reprinted with permission from Ref. [216]. Copyright 2021, Elsevier. (d) Proposed electrochemical reduction mechanism of HMF over Ru1Cu. Reprinted with permission from Ref. [217]. Copyright 2022, John Wiley and Sons.
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