双金属片
催化作用
分解水
硫系化合物
阳极
析氧
氧化物
电解
吸附
电化学
材料科学
离子
阴极
无机化学
化学工程
化学
电解水
物理化学
电极
光催化
电解质
光电子学
有机化学
工程类
生物化学
作者
Jian Zhou,Yibo Dou,Tao He,Awu Zhou,Xiang‐Jing Kong,Xue‐Qian Wu,Tongxin Liu,Jiànróng Lǐ
出处
期刊:Nano Research
[Springer Nature]
日期:2021-03-24
卷期号:14 (12): 4548-4555
被引量:29
标识
DOI:10.1007/s12274-021-3370-7
摘要
Enhancing electrocatalytic water splitting performance by modulating the intrinsic electronic structure is of great importance. Here, porous bimetallic oxide and chalcogenide nanosheets grown on carbon paper denoted as NiCo2X4/CP (X = O, S, and Se) are prepared to demonstrate how the anion components affect the electronic structures and thereby disclose the correlation between their intermediates interaction and catalytic activities. The experimental characterization and theoretical calculation demonstrate that Se and S substitution can promote the ratio of Co3+/Co2+ and thereby modulate the electronic structure accompanied with the upshift of d band centers, which not only enhance the inner conductivity but also regulate the interaction between the catalyst surface and intermediates, especially for the adsorption of absorbed H and hydroperoxy intermediates towards respective hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a result, a full alkaline electrolyzer using NiCo2Se4/CP and NiCo2S4/CP as cathode and anode delivers a low voltage of 1.51 V at 10 mA·cm−2, which is comparable even superior to most transition metal-based electrolyzers.
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