文献类型：期刊文献

英文题名：Growth of superhydrophilic metal-oxyhydroxide layer as "firebreak forest"for exponentially enhanced stability in seawater splitting

作者：Li, Shiyi[1];Wang, Keyu[1];Liang, Chen[1];Wu, Haoran[1];Li, Jiankun[1];Wang, Yixing[1];Lei, Linfeng[1];Zhu, Minghui[1];Zhuang, Linzhou[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：3

期号：11

外文期刊名：CHEM CATALYSIS

收录：WOS:【ESCI(收录号:WOS:001114229200001)】；

基金：ACKNOWLEDGMENTS The authors gratefully acknowledge the research funding provided by the National Key R&D Program of China (grant no. 2021YFB3801301) and the National Natural Science Foundation of China (grant nos. 22075076, 22005098, and 22208092) .

语种：英文

摘要：Developing an active and stable nonprecious-metal-based oxygen evolution catalyst is crucial for boosting green hydrogen industry via direct seawater splitting. However, it has been a significant challenge due to electrode deactivation caused by chloride corrosion. Herein, a nickel-cobalt oxyhydroxide layer is grown on Ni foam via a reconstruction-complete coating strategy. The dense and super hydrophilic oxyhydroxide layer could facilitate the adsorption of abundant OH- ions, which could repel the Cl- ions via electrostatic repulsive force. Consequently, the electrode shows exponentially enhanced stability and superior activity for oxygen evolution reaction (OER) in the electrolyte of 1.0 M KOH + 2.0 M NaCl. It requires a low overpotential of 330 mV to achieve a current density of 100 mA cm -2 and operates stably over 70 h at a large current density of 500 mA cm -2. This work presents a facile strategy for preparing high-performance seawater-splitting catalyst.