催化学报 ›› 2026, Vol. 87: 230-242.DOI: 10.1016/S1872-2067(26)65108-X
李柯a, 罗燚b,*(
), 蔡晨宁a, 郑泽民c, 余罡c, 胡建强b, 陈胜利a,*(
)
收稿日期:2025-10-24
接受日期:2025-12-29
出版日期:2026-08-18
发布日期:2026-06-24
通讯作者:
*电子信箱: slchen@whu.edu.cn (陈胜利),基金资助:
Ke Lia, Yi Luob,*(
), Chenning Caia, Zemin Zhengc, Gang Yuc, Jianqiang Hub, Shengli Chena,*(
)
Received:2025-10-24
Accepted:2025-12-29
Online:2026-08-18
Published:2026-06-24
Supported by:摘要:
质子交换膜燃料电池(PEMFC)功率密度高, 产物只有水, 被视为最理想的能源动力系统之一. 然而, 其阴极氧还原(ORR)反应动力学缓慢, 需要高活性铂(Pt)基催化剂以维持高能量输出, 成本居高难下. 同时, 催化剂在实际运行中易因碳载体腐蚀、Pt纳米颗粒团聚及金属溶解等问题而性能迅速衰减. PEMFC的应用长期面临ORR催化剂在活性、耐久性与成本之间难以兼顾的“不可能三角”困境. 针对上述挑战, 本文创新提出“氮化钨增强金属-氮-碳(WN-M-N-C) ”载体策略, 通过引入亚纳米WN与原子级分散的金属-Nₓ位点协同作用, 同步优化Pt的电子结构与催化界面的稳定性.
李柯, 罗燚, 蔡晨宁, 郑泽民, 余罡, 胡建强, 陈胜利. WN增强金属-N-C载体平台构筑燃料电池用高耐久性Pt基氧还原催化剂[J]. 催化学报, 2026, 87: 230-242.
Ke Li, Yi Luo, Chenning Cai, Zemin Zheng, Gang Yu, Jianqiang Hu, Shengli Chen. WN enhanced metal-N-C platform for ultra-stable Pt oxygen reduction electrocatalyst in fuel cell[J]. Chinese Journal of Catalysis, 2026, 87: 230-242.
Fig. 1. Overall performance demonstration and structural characterizations of the developed catalysts. (a) Schematic illustration of the microstructure of Pt/WN-M-N-C catalysts. (b) XRD patterns of Pt/WN-M-N-C catalysts with different metals (M = Fe/Co/Ni), as well as those of TKK 20% Pt/C and WN-Fe-N-C. (c) HAADF-STEM image of WN-Fe-N-C. Elemental mapping of WN-Fe-N-C: corresponding HAADF-STEM image (d), W (e), N (f), and Fe (g). (h) HAADF-STEM image of Pt/WN-Fe-N-C with the corresponding Pt nanoparticle size distribution histogram. Comparison diagram of durability data between Pt/W-Fe-N-C and other recently reported advanced Pt-based catalysts in MEA: MA retention (i) and peak power density retention (j) [1,39-59].
Fig. 2. Comprehensive microstructural and electronic characterization of the Pt/WN-Fe-N-C catalyst. (a) Bright-field TEM image revealing the triphasic interface between Pt nanocrystals, carbon matrix, and WN nanoparticles. (b) High-magnification HAADF-STEM image of a single Pt nanoparticle demonstrating the well-ordered atomic arrangement characteristic of high crystallinity. (c?f) Atomic-resolution HAADF-STEM image of an individual Pt-based nanoparticle. (d) Corresponding elemental maps of the nanoparticle displayed in panel (c): Pt-L signal (d), Fe-K signal (e), and W-L signal (f). (g) Elemental line-scan profile across the nanoparticle indicated in panel (c), showing the spatial distribution of Pt, Fe, and W. (h) High-resolution Pt 4f XPS spectra with peak deconvolution for Pt/WN-Fe-N-C, Pt-Fe/Fe-N-C, and commercial TKK 20% Pt/C. (i) High-resolution W 4f XPS spectra with corresponding peak fitting analysis for Pt/WN-Fe-N-C and WN-Fe-N-C.
Fig. 3. Comparative electrochemical stability evaluation of Pt/WN-M-N-C (M = Fe, Co, Ni) catalysts under different aging cycles. CV curves (a), LSV curves (b), and performance degradation data (c) of Pt/WN-Fe-N-C at different numbers of aging cycles. CV curves (d), LSV curves (e), and performance degradation data (f) of Pt/WN-Co-N-C at different numbers of aging cycles. CV curves (g), LSV curves (h), and performance degradation data (i) of Pt/WN-Ni-N-C at different numbers of aging cycles. Test conditions: 25 °C, oxygen saturated 0.10 mol/L HClO4 solution, 20 mV/s for CV test, 1600 rpm for LSV test, 15 µg/cm2-Pt loading on the electrode, ADT cycles between 0.60-1.00 V vs. RHE at 50 mV/s.
Fig. 4. The TEM images and Pt nanoparticle size distribution histogram of Pt/WN-M-N-C. The TEM images of Pt/WN-Fe-N-C (a), Pt/WN-Co-N-C (b), and Pt/WN-Ni-N-C (c) after ADTs. Pt nanoparticle size distribution histogram of Pt/WN-Fe-N-C (d), Pt/WN-Co-N-C (e), and Pt/WN-Ni-N-C (f) before and after ADTs.
Fig. 5. Performance evaluation of PEMFC with Pt/WN-Fe-N-C and TKK50% Pt/C catalysts under various ADT cycles. (a) Polarization curves of H2-O2 MEAs with Pt/WN-Fe-N-C as cathode catalyst at different ADT cycles. (b) Peak power density and MA data of H2-O2 MEAs with Pt/WN-Fe-N-C cathode catalyst at different ADT cycles. (c) CV curves of PEM fuel cells at different ADT cycles using Pt/WN-Fe-N-C as cathode catalyst. (d) Polarization curves of H2-O2 MEAs with TKK 50% Pt/C cathode catalyst. (e) Voltage values at 0.80 A/cm2 current density under various ADT cycles (H2-O2 Pt-Fe/Fe-N-C in Ref. [28]). Test conditions: 0.05 mg/cm2 Pt loading for Pt/WN-Fe-N-C, 0.100 mg/cm2 Pt loading for TKK Pt/C, back pressure 150 kPa, 80 °C, 100% R.H. (f) TEM of Pt/WN-Fe-N-C after 90000 cycles ADTs in MEA.
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