Affiliation:
1. School of Chemical Science and Engineering Shanghai Key Laboratory of Chemical Assessment and Sustainability State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 P. R. China
2. College of Bioengineering East China University of Science and Technology Shanghai 200237 P. R. China
3. Faculty of Engineering and Environment Northumbria University Newcastle upon Tyne NE99 UK
Abstract
AbstractDue to the sluggish kinetics of oxygen evolution reaction (OER), electrocatalysts are urgently needed to simultaneously achieve increased activity, enhanced stability, and reduced cost. Herein, CoFePS quaternary alloy sub‐nanometric sheet is synthesized via synchronously phosphor‐sulfurizing CoFe‐bimetallene. Heteroatomization results in increasing conductivity, enhancing interactions with electrolyte, and improving chemical structural stability to exhibit a current density of 10 mA cm−2 at 211 mV and a large current of 1053 mA cm−2 at 570 mV. Density functional theory calculations reveal that the adjustment of Fermi levels of adjacent metal atoms reduces reaction energy barrier and accelerates electron transfer, resulting in a Tafel slope of 14 mV dec−1. In situ Raman monitors the formation of phosphor‐sulfate shell oxidized surface as active sites improved the OER stability of CoFePS, with a retention rate of 99.7% at 10 mA cm−2 for 78 h. This study provides a promising strategy for the synthesis of multicomponent alloy sub‐nanometric sheet as good electrocatalyst candidates for OER.
Funder
National Natural Science Foundation of China
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
4 articles.
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