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

11 Citations (Scopus)

Abstract

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
Number of pages8
JournalAdvanced Functional Materials
Volume33
Issue number50
Early online date7 Aug 2023
DOIs
Publication statusPublished - 8 Dec 2023

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