Selenate promoted stability improvement of nickel selenide nanosheet array with an amorphous NiOOH layer for seawater oxidation

IF 10 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Today Physics Pub Date : 2023-10-05 DOI:10.1016/j.mtphys.2023.101249

Hui Zhang , Xun He , Kai Dong , Yongchao Yao , Shengjun Sun , Min Zhang , Meng Yue , Chaoxin Yang , Dongdong Zheng , Qian Liu , Yonglan Luo , Binwu Ying , Sulaiman Alfaifi , Xuqiang Ji , Bo Tang , Xuping Sun

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引用次数: 2

Abstract

Seawater electrolysis offers significant potential for green hydrogen production, the presence of harmful chlorine species, nevertheless, can cause severe anode corrosion. Here, we present our recent finding that selenate anions adsorbed nickel selenide nanosheet array with an amorphous NiOOH layer on Ni foam (NiSe₂@NiOOH/NF) serves as a high-efficiency and durable electrocatalyst for oxygen evolution reaction (OER) in alkaline seawater. It requires an overpotential of 460 mV to obtain 500 mA cm⁻². Impressively, it shows at least 100 h of electrolysis tolerance at 500 mA cm⁻². Insights from electrochemical in situ Raman spectroscopy and chlorine extraction tests unveil that selenite undergoes oxidation to selenate during the OER test, effectively suppressing hypochlorite generation.

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硒酸盐促进了非晶NiOOH层硒化镍纳米片阵列的稳定性

海水电解为绿色氢气生产提供了巨大的潜力，然而，有害氯物种的存在会导致严重的阳极腐蚀。在这里，我们介绍了我们最近的发现，硒酸根阴离子吸附了在镍泡沫上具有无定形NiOOH层的硒化镍纳米片阵列(NiSe2@NiOOH/NF）是一种用于碱性海水中析氧反应（OER）的高效耐用的电催化剂。它需要460 mV的过电位才能获得500 mA cm−2。令人印象深刻的是，它在500 mA cm−2下显示出至少100小时的电解耐受性。电化学原位拉曼光谱和氯提取测试的结果表明，亚硒酸盐在OER测试过程中被氧化为硒酸盐，有效抑制了次氯酸盐的产生。

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来源期刊

Materials Today Physics Materials Science-General Materials Science

CiteScore

14.00

自引率

7.80%

发文量

284

审稿时长

15 days

期刊介绍： Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.