过电位
析氧
材料科学
塔菲尔方程
兴奋剂
催化作用
密度泛函理论
化学工程
吉布斯自由能
分解水
电催化剂
纳米技术
氧气
物理化学
电化学
热力学
电极
化学
光电子学
计算化学
工程类
物理
光催化
生物化学
有机化学
作者
Shaghraf Javaid,Xiaomin Xu,Wei Chen,Jiayi Chen,Hsien‐Yi Hsu,Sheng Wang,Xuyong Yang,Yunguo Li,Zongping Shao,Franca Jones,Guohua Jia
出处
期刊:Nano Energy
[Elsevier]
日期:2021-11-01
卷期号:89: 106463-106463
被引量:45
标识
DOI:10.1016/j.nanoen.2021.106463
摘要
To overcome the limited potency of energy devices such as alkaline water electrolyzers, the construction of active materials with dramatically enhanced oxygen evolution reaction (OER) performance is of great importance. Herein we developed an ion diffusion-induced doping strategy that is capable of producing Ni2+/Co2+ doped two-dimensional (2D) Au-Fe7S8 nanoplatelets (NPLs) with exceptionally high OER activity outperforming the benchmark RuO2 catalyst. The co-existence of Co and Ni in Au-Fe7S8 NPLs led to the lowest OER overpotential of 243 mV at 10 mA cm-2 and fast kinetics with a Tafel slope of 43 mV dec-1. Density functional theory (DFT) calculations demonstrated that Ni2+/Co2+ doping improves the binding of OOH species on the {001} surfaces of Au-Fe7S8 NPLs and lowers the Gibbs free energy of the OER process, which are beneficial to outstanding OER activity of the nanoplatelets.
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