期刊
ADVANCED MATERIALS
卷 33, 期 33, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202101845
关键词
amorphization; integrated oxygen evolution reaction electrodes; oxygen micro-alloyed high-entropy alloys
类别
资金
- National Thousand a Young Talents Program of China
- Fundamental Research Funds for the Central Universities [2018KFYXKJC009]
- National Natural Science Foundation of China [21805074]
- BAGUI talent program [2019AC26001]
- NSFGX [2017GXNSFDA198040]
- public computing service platform by Network and Computing Center of HUST
Oxygen micro-alloyed high-entropy alloys developed through metallurgy approach exhibit exceptional electrocatalytic performance, offering a technological-orientated strategy to integrated electrodes.
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 Cr2O3 microdomains, the leaching of Cr3+ ions, and structural amorphization at the interfaces of the domains. These findings offer a technological-orientated strategy to integrated electrodes.
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