Cu- and S-Doped Heteropolyacid Co2Mo10 as Electrocatalysts for Efficient Hydrogen Evolution

Qian Ling; Jiani Wang; Dinghan Liu; Xuejun Wang; Sizhan Shu; Denglin Zhu; Zile Zhou; Xuefei Wu; Pingfan Wu

doi:10.1021/acs.langmuir.4c02971

Cu- and S-Doped Heteropolyacid Co₂Mo₁₀ as Electrocatalysts for Efficient Hydrogen Evolution

Langmuir. 2024 Nov 5. doi: 10.1021/acs.langmuir.4c02971. Online ahead of print.

Authors

Qian Ling¹, Jiani Wang¹, Dinghan Liu¹, Xuejun Wang¹, Sizhan Shu¹, Denglin Zhu¹, Zile Zhou¹, Xuefei Wu², Pingfan Wu¹

Affiliations

¹ Institute of POM-based Materials, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, Hubei, P.R. China.
² SINOPEC Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd., Dalian 116045, Liaoning, P.R. China.

PMID: 39498615
DOI: 10.1021/acs.langmuir.4c02971

Abstract

This study employed polyoxometalate Co₂Mo₁₀ as a precursor and a two-step method to prepare carbon cloth-supported Cu_xS-CoS₂-MoS₂ materials. The morphology and structure of the materials were characterized using XRD, XPS, SEM, TEM, and other techniques. Interestingly, changes in the reducing gas during the calcination process could adjust the product morphology, thereby altering catalytic activity. Electrochemical results indicated that the Cu_xS-CoS₂-MoS₂ nanomaterials prepared under an NH₃ atmosphere exhibited unique morphology and structural advantages. They demonstrated significant electrocatalytic activity for the hydrogen evolution reaction (HER) in alkaline and acidic electrolytes (overpotentials of 108 and 196 mV at a current density of 10 mA cm^-2, lower than the overpotentials of 143 and 226 mV obtained under a H₂-Ar atmosphere during calcination) and excellent long-term durability. These findings provide insights and methods for synthesizing multicomponent electrocatalysts with enhanced catalytic performance.