文献类型：期刊文献

英文题名：Chloride-resistant vacancy-rich CoFe catalysts for robust alkaline seawater electrolysis

作者：Lin, Jiahao[1];Wang, Keyu[1];Li, Shiyi[1];Lei, Linfeng[1,2,3];Zhu, Minghui[1];Zhuang, Linzhou[1,2];Xu, Zhi[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[3]Suzhou Lab, Suzhou 215000, Peoples R China

年份：2025

卷号：646

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20251918390255);WOS:【SCI-EXPANDED(收录号:WOS:001491407700001)】；

基金：The authors gratefully acknowledge the research funding provided by National Key R & D Program of China (Grant No. 2021YFB3801301) , National Natural Science Foundation of China (Grant Nos. 22378119, 22075076, and 22208092) , and Shanghai Pilot Program for Basic Research (22TQ1400100-4) .

语种：英文

外文关键词：Core-shell structure; Defect-rich; Ion selectivity; Anti-corrosion; Seawater splitting

摘要：Seawater electrolysis offers a promising pathway for sustainable hydrogen production while addressing freshwater scarcity. However, two critical challenges hinder its application: sluggish oxygen evolution reaction (OER) kinetics and electrode degradation due to chloride corrosion. Here, we report a high-performance OER catalyst (CFNC-1150-X) engineered via high-temperature calcination, comprising vacancy-rich, microporous nitrogen-doped carbon (NC) shells encapsulating CoFe alloy clusters. The high-temperature treatment induces vacancy-anchored Co/Fe coordination (Co/Fe-V-N-C) within the NC shell, which serves as the active OER sites, significantly enhancing catalytic activity. Concurrently, the ultra-micropores (similar to 0.31 nm) in the NC shell act as ion sieves, selectively hindering Cl- diffusion and effectively shielding the CoFe core from corrosion. The optimized CFNC-1150-3 catalyst demonstrates remarkable performance, with a low overpotential of 319 mV at 10 mA cm(-2) in weakly alkaline seawater and exceptional long-term stability over 200 h at 25 mA cm(-2). This work highlights the potential of CFNC catalysts for large-scale, efficient, and durable alkaline seawater electrolysis, advancing the development of green hydrogen technologies.