电催化剂
材料科学
镍
氢
化学工程
无机化学
纳米技术
物理化学
冶金
电化学
电极
有机化学
化学
工程类
作者
P. Zhang,Han Man,Yao Huo,Fei Zhang,Yang Liu,Renbing Wu,Fei Wang,Dalin Sun
标识
DOI:10.1002/adfm.202409365
摘要
Abstract The development of efficient and long‐term stable electrodes for hydrogen evolution reaction (HER) in seawater is highly desirable for hydrogen generation but remains challenging. In this work, a highly active CrO x @Ni 2 P‐Ni 5 P 4 /NF electrode is developed and investigated its dynamic reconstruction for HER in neutral electrolytes. The combination of in situ Raman spectra and electrochemical measurements revealed the dynamic surface reconstruction of the catalyst during HER. The CrO x modification not only effectively facilitates water dissociation but also stabilizes the structure post‐reconstruction, enabling rapid and stable hydrogen generation in neutral media. Remarkably, CrO x @Ni 2 P‐Ni 5 P 4 /NF exhibits overpotentials of 109 and 263 mV at current densities of 10 and 100 mA cm −2 in 1 m PBS, respectively. Concurrently, it exhibits stable operation for 500 h in 1 m PBS and 140 h in natural seawater at current densities of 50 and 100 mA cm −2 , respectively. The proposed catalytic electrode and the mechanistic insights present a significant stride toward the realization of metal phosphides for direct seawater splitting.
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