Chinese Journal of Catalysis ›› 2025, Vol. 69: 1-16.DOI: 10.1016/S1872-2067(24)60209-3
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Mingzhi Wang, Wensheng Fang, Deyu Zhu, Chenfeng Xia, Wei Guo(), BaoYu Xia(
)
Received:
2024-10-24
Accepted:
2024-12-20
Online:
2025-02-18
Published:
2025-02-10
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E-mail: About author:
Wei Guo is currently an associate professor in the School of Chemistry and Chemical Engineering at Huazhong University of Science and Technology (HUST), China. He obtained his B.S. in 2012 and Ph.D. degree in 2017 from HUST. Following the completion of his postdoctoral research at the University of Tennessee, Knoxville, and Oak Ridge National Laboratory (USA) in 2021, he joined the faculty at HUST. His research interests are in energy-efficient CO2 capture and conversion.Supported by:
Mingzhi Wang, Wensheng Fang, Deyu Zhu, Chenfeng Xia, Wei Guo, BaoYu Xia. Tandem design on electrocatalysts and reactors for electrochemical CO2 reduction[J]. Chinese Journal of Catalysis, 2025, 69: 1-16.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60209-3
Tandem scale | Intermediate | Catalyst | Product | FE (%) | Ref. |
---|---|---|---|---|---|
Microscopic scale | *CO | CuZn alloy | C2H4 | 33.3 | [ |
*CO | CuAg mixture | C2+ | N/A | [ | |
*CO | GBs rich Cu | C2+ | N/A | [ | |
*CO | AgCu SANP | C2+ | 94.0 | [ | |
*CO, HCOO(H) | SnS2/Sn1-O3G | CH3CH2OH | 82.5 | [ | |
*CO | Cu/Au heterojunctions | CH3CH2OH | 60.0 | [ | |
*CO | Cu2O-Pd-Ag | C2H4 | 63.2 | [ | |
*CO | Pd-Cu2O | C2+ | 80.8 | [ | |
Mesoscopic scale | CO | Cu/Ni-N-C | C2H4 | 62.0 | [ |
CO | Cu/ZnO | C2+ | N/A | [ | |
CO | Cu@Ag | C2+ | 67.6% | [ | |
CO | Cu/Fe-N-C | C2+ | 90.0 | [ | |
CO | CoPc@HC/Cu | C2+ | 82.0 | [ | |
CO | Ag-Cu | C2+ | 80.2 | [ | |
CO | Cu/Ni-N-C | C2+ | 68.0 | [ | |
CO | Cu/Ag | CH3CH2OH | 56.5 | [ | |
Macroscopic scale | CO | (NiO-YSZ/YSZ/GDC/LSC)/Cu:Py:SSC | C2H4 | 65.0 | [ |
CO | Ni-SAG/Cu2O | N-propanol | 15.9 | [ | |
CH3COOH | Cu/microorganism fermentation | long-chain compounds | N/A | [ | |
CH3CH2OH | Cu/enzymatic bioreactor | C6 lactol | N/A | [ | |
CO, H2 | Ni-N-C/Cu | C2H4, CH3CH2OH | N/A | [ | |
CO, O2 | Ag-HMT/Pd (II) | organic amides | N/A | [ | |
HCOO(H) | Bi NWs/bioreactors | C6 sugar | N/A | [ | |
CO | Ag/Cu | CH3COOH | 30-35 | [ |
Table 1 Major advances in T-ECR at different scales.
Tandem scale | Intermediate | Catalyst | Product | FE (%) | Ref. |
---|---|---|---|---|---|
Microscopic scale | *CO | CuZn alloy | C2H4 | 33.3 | [ |
*CO | CuAg mixture | C2+ | N/A | [ | |
*CO | GBs rich Cu | C2+ | N/A | [ | |
*CO | AgCu SANP | C2+ | 94.0 | [ | |
*CO, HCOO(H) | SnS2/Sn1-O3G | CH3CH2OH | 82.5 | [ | |
*CO | Cu/Au heterojunctions | CH3CH2OH | 60.0 | [ | |
*CO | Cu2O-Pd-Ag | C2H4 | 63.2 | [ | |
*CO | Pd-Cu2O | C2+ | 80.8 | [ | |
Mesoscopic scale | CO | Cu/Ni-N-C | C2H4 | 62.0 | [ |
CO | Cu/ZnO | C2+ | N/A | [ | |
CO | Cu@Ag | C2+ | 67.6% | [ | |
CO | Cu/Fe-N-C | C2+ | 90.0 | [ | |
CO | CoPc@HC/Cu | C2+ | 82.0 | [ | |
CO | Ag-Cu | C2+ | 80.2 | [ | |
CO | Cu/Ni-N-C | C2+ | 68.0 | [ | |
CO | Cu/Ag | CH3CH2OH | 56.5 | [ | |
Macroscopic scale | CO | (NiO-YSZ/YSZ/GDC/LSC)/Cu:Py:SSC | C2H4 | 65.0 | [ |
CO | Ni-SAG/Cu2O | N-propanol | 15.9 | [ | |
CH3COOH | Cu/microorganism fermentation | long-chain compounds | N/A | [ | |
CH3CH2OH | Cu/enzymatic bioreactor | C6 lactol | N/A | [ | |
CO, H2 | Ni-N-C/Cu | C2H4, CH3CH2OH | N/A | [ | |
CO, O2 | Ag-HMT/Pd (II) | organic amides | N/A | [ | |
HCOO(H) | Bi NWs/bioreactors | C6 sugar | N/A | [ | |
CO | Ag/Cu | CH3COOH | 30-35 | [ |
Fig. 1. Fig.1. Micro-scale bimetallic synergistic tandem catalysis. (a) Schematic illustration of the tandem catalysis mechanism over AgCu SANP. (b) Comparison of electrochemical performance of AgCu SANP with other catalysts at 0.65 V vs. RHE. (a,b) Reproduced with permission from Ref. [56]. Copyright 2023, Springer Nature. (c) Proposed mechanism of C2 production on the Au NBP-Cu JNC catalysts. (d) Electrochemical CO2 reduction performances of the Au NBP-Cu JNC catalysts. (d) Electrochemical CO2 reduction performances of the Au NBP-Cu JNC catalysts. (c,d) Reproduced with permission from Ref. [61]. Copyright 2021, John Wiley and Sons.
Fig. 2. CuZn and CuPd bimetals for synergistic tandem catalysis. (a) Mechanism of T-ECR on the surface of metallic CuZn NPs. (b) The FEs at varied potentials of the products on CuZn alloy. (a,b) Reproduced with permission from Ref. [69]. Copyright 2018, American Chemical Society. (c) Three distinct catalyst active sites promote electroreduction of CO2 to C2+ products. (d) The FEs at varied potentials of the products on Pd-Cu catalyst at different applied current density. (c,d) Reproduced with permission from Ref. [70]. Copyright 2024, John Wiley and Sons.
Fig. 3. Monometallic Cu and Sn-based catalysts used in T-ECR. (a) Process diagram of ECR to C2H4 on the Pd-decorated Cu2O-Ag catalyst. Reproduced with permission from Ref. [73]. Copyright 2024, American Chemical Society. (b) Process diagram of ECR to C2H5OH on AuAgCu NSs. (b) Reproduced with permission from Ref. [74]. Copyright 2022, Springer Nature. (c) Cu-g-C3N4 with synergistic active centers for tandem electrochemical ECR. (d) Key reaction intermediates of CH3CH2OH generation on Cu-C3N4. (c,d) Reproduced with permission from Ref. [76]. Copyright 2017, American Chemical Society. (e) A schematic illustration of the tandem reaction during CO2 reduction to ethanol over SnS2/Sn1-O3G. (f) Reaction energy profiles and the corresponding intermediate structures (1?7) for producing ethanol via the ECR on the Sn1-O3G catalyst. Reproduced with permission from Ref. [16]. Copyright 2023, Springer Nature.
Fig. 4. Tandem reactions with core-shell structure and its T-ECR performance. (a) Schematic illustration of tandem reactions for ECR to C2 over core-shell Ag-Cu catalyst. (b) The corresponding TEM, EDS elemental mapping, and HRTEM images of core-shell Ag-Cu 5 wt% catalyst. (a,b) Reproduced with permission from Ref. [86]. Copyright 2023, Elsevier. (c) Schematic illustration of tandem reactions for T-ECR to C2 over core-shell Cu-Ag catalyst. (d) The corresponding TEM, EDS elemental mapping, and HRTEM of core-shell Cu-Ag catalyst. (d) Reproduced with permission from Ref. [87]. Copyright 2021, John Wiley and Sons.
Fig. 5. The tandem reactions with a vertically layered structure based on GDE. (a) Schematic illustration of CO2-CO-C2+ tandem conversion on a layered GDE/Cu/ZnO electrode. (b) The EDS elemental mapping images of the cross-section of GDE/Cu/ZnO electrode. (c) The FE and (d) partial current density of CO, C2H4, and C2+ products on the bare Cu1.0 electrode, Cu1.0&ZnO0.20 mixed electrode, and Cu1.0/ZnO0.20 tandem electrode. (a?d) Reproduced with permission from Ref. [92]. Copyright 2020, Elsevier.
Fig. 6. Relay tandem reactions based on GDE/B/A at the mesoscale under alkaline conditions. (a) Schematic illustration of stacked segmented GDE/Cu/Ag catalysts. (b) Schematic illustration of the flow-channel geometry and gas concentration changing along the flow channel during the tandem reduction of CO2. (c) FE and partial current densities of C2H4 and C2+ products as a function of cell voltage on doubly loaded Cu/Fe-N-C s-GDE as conducted in a flow cell. (a?c) Reproduced with permission from Ref. [94]. Copyright 2022, Springer Nature. (d) Schematic illustration of the spatially decoupled strategy via tandem catalysis in the acidic ECR system, showing CO2 to CO and CO to C2+. (e) Schematic illustration of the Cu/CoPc@HC tandem catalysis and the electron transfer and mass transport in acidic ECR. (f) Current density towards ECR products on the CoPc@HC/Cu tandem electrode and Cu electrode in an acidic buffer electrolyte of 0.5 mol L?1 H3PO4 and 0.5 mol L?1 KH2PO4 with 2.5 mol L?1 KCl in a flow cell. (d?f) Reproduced with permission from Ref. [43]. Copyright 2024, Springer Nature. (g) Production of C2+ products on Cu catalyst in alkaline (the one above) and in acidic conditions (the one below). (h) Schematic illustration of GDE/Cu/Ni-N-C tandem system. (i) Total FE of C2+ products on different electrodes. (g?i) Reproduced with permission from Ref. [111]. Copyright 2024, Elsevier.
Fig. 7. Reactor cascade on a macroscopic scale. (a) Tandem devices for the CO2-to-C2H4 process via two separate electrochemical cells. (a) Reproduced with permission from Ref. [113]. Copyright 2021, Elsevier. (b) Schematic illustration of the tandem electrothermo-catalysis system. (b) Reproduced with permission from Ref. [120]. Copyright 2024, John Wiley and Sons. (c) Schematic illustration of the customizable electrocatalytic-biocatalytic flow system for solar-driven food production directly from CO2. (c) Reproduced with permission from Ref. [21]. Copyright 2024, Springer Nature. (d) Schematic illustration of the in vitro artificial sugar synthesis system. (d) Reproduced with permission from Ref. [22]. Copyright 2022, Springer Nature. (e) Schematic illustration of cell-free CO2 valorization to C6 pharmaceutical precursors via a novel electro-enzymatic process. (e) Reproduced with permission from Ref. [20]. Copyright 2022, American Chemical Society.
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