磷化物
电催化剂
分解水
双功能
析氧
材料科学
无定形固体
氢
化学工程
纳米技术
化学
催化作用
物理化学
电化学
冶金
电极
结晶学
镍
生物化学
有机化学
光催化
工程类
作者
Yiqing Zhang,Junhui Liang,Gan Luo,Xin Yao,Xiang Ding,Wei Wei,Huayu Chen,Laishun Qin,Yuexiang Huang,Da Chen
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2023-09-08
卷期号:37 (18): 14171-14179
被引量:1
标识
DOI:10.1021/acs.energyfuels.3c02136
摘要
Utilizing solar-cell-assisted water splitting has emerged as a promising strategy for producing clean hydrogen energy and addressing the energy crisis. Nevertheless, the efficiency of solar to hydrogen (STH) remains hindered by the sluggish reaction kinetics of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Two-dimensional (2D) WS2, while featuring abundant exposed reaction sites, suffers from inadequate intrinsic activity, limiting its practical application. In this work, we develop an innovative covalent doping approach to modify the electronic structure and adjust the free-energy barrier from O* to OOH* by growing amorphous Ni–Fe phosphide on WS2 nanosheets (NSs). Consequently, the overpotentials for the OER and HER at 10 mA/cm2 are reduced by 7% and 15%, respectively, in comparison to pure Ni–Fe phosphide. Furthermore, the bifunctional electrocatalyst, Ni–Fe phosphide @ WS2, can deliver a current density of 10 mA/cm2 at a low voltage of 1.67 V. When coupled with an a-Si:H/a-SiGe:H/a-SiGe:H triple-junction solar cell, it attains a substantial STH efficiency of 8.49%.
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