过电位
材料科学
塔菲尔方程
高熵合金
析氧
合金
电流密度
氧气
离子
纳米技术
化学工程
电化学
冶金
电催化剂
电极
物理化学
化学
有机化学
工程类
物理
量子力学
作者
Zheng‐Jie Chen,Tao Zhang,Xiaoyu Gao,Yongjiang Huang,Xiao‐Hui Qin,Yi‐Fan Wang,Kai Zhao,Peng Xu,Cheng Zhang,Lin Liu,Ming‐Hua Zeng,Hai‐Bin Yu
标识
DOI:10.1002/adma.202101845
摘要
Abstract One important goal of the current electrocatalysis is to develop integrated electrodes from the atomic level design to multilevel structural engineering in simple ways and low prices. Here, a series of oxygen micro‐alloyed high‐entropy alloys (O‐HEAs) is developed via a metallurgy approach. A (CrFeCoNi) 97 O 3 bulk O‐HEA shows exceptional electrocatalytic performance for the oxygen evolution reaction (OER), reaching an overpotential as low as 196 mV and a Tafel slope of 29 mV dec −1 , and with stability longer than 120 h in 1 m KOH solution at a current density of 10 mA cm −2 . It is shown that the enhanced OER performance can be attributed to the formation of island‐like Cr 2 O 3 microdomains, the leaching of Cr 3+ ions, and structural amorphization at the interfaces of the domains. These findings offer a technological‐orientated strategy to integrated electrodes.
科研通智能强力驱动
Strongly Powered by AbleSci AI