High-Performance Co4S3-MnS-MoS2@CC Catalysts for Hydrogen Evolution Reaction

Abstract

By leveraging the self-assembly properties of polyoxometalates (POMs), we synthesized a trimetallic-integrated POM compound, [Co(NH3)6]2(MnMo9O32) (Co2MnMo9), and subsequently fabricated a composite catalytic material, Co4S3-MnS-MoS2@CC, anchored on carbon cloth through a hydrothermal-calcination strategy. Experimental results demonstrate that the incorporation of trace amounts of Co4S3 and MnS substantially enhances the electrocatalytic performance of the hybrid material. At a current density of 10 mA cm-2, the overpotential of the composite is reduced to 88 mV in alkaline media and 140 mV in acidic media, markedly superior to pristine MoS2 (197 mV in alkaline and 237 mV in acidic conditions). Through comprehensive characterization techniques and electrochemical analyses, we elucidated the synergistic enhancement mechanism arising from multi-metallic doping. This work provides novel insights and technical benchmarks for the development of cost-effective, high-efficiency electrocatalysts.