塔菲尔方程
材料科学
电催化剂
析氧
钴
化学工程
电化学
催化作用
掺杂剂
无定形固体
纳米技术
分解水
过电位
兴奋剂
电极
光电子学
冶金
光催化
化学
物理化学
生物化学
有机化学
工程类
作者
Tanveer ul Haq,Said Mansour,Akhtar Munir,Yousef Haik
标识
DOI:10.1002/adfm.201910309
摘要
Abstract Electrochemical water splitting has been considered a promising approach for green and sustainable hydrogen as a future energy carrier. However, the lack of high performance and inexpensive electrocatalysts for kinetically sluggish oxygen evolution reaction (OER) hinder the practical application. Here, the noteworthy enhancement of electrodeposited cobalt boride (CoB) nanosheets from the combined effect of using gadolinium as a dopant and thin film of gold as prudent support is demonstrated. The free‐standing Gd‐CoB@Au exhibits remarkable electrochemical performance, high intrinsic activity, and lower reaction resistance, which are confirmed by lower onset potential, small charge transfer resistance, lower Tafel slope value, and high turnover frequency. Furthermore, the post‐OER characterization signpost, no observable change in the chemical structure or morphology of nanosheets during the long‐lasting oxidation process. Because of the inexpensive, facile, and scalable one‐step preparation processes, the catalyst is highly encouraging for large‐scale practical applications.
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