过电位
析氧
电催化剂
材料科学
薄膜
三元运算
合金
溅射沉积
化学工程
催化作用
微观结构
溅射
电化学
纳米技术
冶金
物理化学
化学
电极
生物化学
计算机科学
工程类
程序设计语言
作者
Siang‐Yun Li,Thi Xuyen Nguyen,Yen‐Hsun Su,Chia‐Chun Lin,Yan‐Jia Huang,Yun‐Hwei Shen,Chuan‐Pu Liu,Jr‐Jeng Ruan,Kao‐Shuo Chang,Jyh‐Ming Ting
出处
期刊:Small
[Wiley]
日期:2022-08-26
卷期号:18 (39)
被引量:34
标识
DOI:10.1002/smll.202106127
摘要
Thin film catalysts, giving a different morphology, provide a significant advantage over catalyst particles for the gas evolution reaction. Taking the advantages of sputter deposition, a high entropy alloy (HEA) thin film electrocatalyst is hereby reported for the oxygen evolution reaction (OER). The catalyst characteristics are investigated not only in its as-deposited state, but also during and after the OER. For comparison, unary, binary, ternary, and quaternary thin film catalysts are prepared and characterized. The surface electronic structure modification due to the addition of a metal is studied experimentally and theoretically using density functional theory calculation. It is demonstrated that sputtered FeNiMoCrAl HEA thin film exhibits OER performance superior to all the reported HEA catalysts with robust electrocatalytic activity having a low overpotential of 220 mV at 10 mA cm-2 , and excellent electrochemical stability at different constant current densities of 10 and 100 mA cm-2 for 50 h. Furthermore, the microstructure transformation is investigated during the OER, which is important for the understanding of the OER mechanism provided by HEA electrocatalyst. Such a finding will contribute to future catalyst design.
科研通智能强力驱动
Strongly Powered by AbleSci AI