CoFePS Quaternary Alloy Sub-nanometric-sheets by Synchronously Phospho-sulfurizing CoFe-bimetallene for Boosting Oxygen Evolution Reaction

Long Zhao, Ming Wen*, Yibo Guo, Qingsheng Wu, Quanjing Zhu, Yongqing (Richard) Fu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Due 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.
Original languageEnglish
Article number2308422
JournalAdvanced Functional Materials
Early online date7 Aug 2023
Publication statusE-pub ahead of print - 7 Aug 2023

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