Sputter-Deposited High Entropy Alloy Thin Film Electrocatalyst for Enhanced Oxygen Evolution Reaction Performance

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

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

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.

原文English
文章編號2106127
期刊Small
18
發行號39
DOIs
出版狀態Published - 2022 9月 28

All Science Journal Classification (ASJC) codes

  • 生物技術
  • 一般化學
  • 生物材料
  • 一般材料科學

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