Rugged High-Entropy Alloy Nanowires with in Situ Formed Surface Spinel Oxide As Highly Stable Electrocatalyst in Zn–Air Batteries

• DOI: 10.1021/acsmaterialslett.0c00434
• Publication Date: 2020-11-23T18:33:59Z
• Authors: Zeyu Jin; Juan Lyu; Yi-Lu Zhao; Huanglong Li; Xi Lin; Guoqiang Xie; Xingjun Liu; Ji-Jung Kai; Hua-Jun Qiu
• Keywords: Oxygen evolution; Noble metal

Noble metal elements are the key to many high-performance heterogeneous catalytic processes; nevertheless, how reduce usage of such scarce and prohibitive materials while maintaining or even enhancing desired performance has always been a grand challenge. In this work, we introduce general dealloying procedure synthesize series predesigned rugged high-entropy alloy (HEA) nanowires, including Al–Ni–Co–Ru–X, where X = Mo, Cu, V, Fe as trifunctional electrocatalysts for hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR). These mechanically chemically stable HEAs can not only significantly noble-metal contents but also effectively enhance flexibility in their electronic structures suitable broad functionalities. Specifically, our etched Al–Ni–Co–Ru–Mo nanowires exhibit similarly high electrocatalytic activity commercial Pt/C HER. Its OER is much higher than RuO2 among highest ever-reported Ru-based catalysts. ORR Pt/C, although Ru considered good catalyst. Moreover, oxidized surfaces these highly during continuous working conditions, which crucial overall water splitting rechargeable Zn–air batteries.