期刊
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
卷 40, 期 3, 页码 -出版社
WILEY
DOI: 10.1002/ep.13558
关键词
Cu3SnS4; electrocatalyst; hydrogen evolution reaction; reduced graphene oxide; solvothermal synthesis
类别
资金
- Department of Science and Technology, Government of India
- KMUTT 55th Anniversary Commemorative Fund
- VTU for Competitive Research Grant
The solvothermal synthesis of Cu3SnS4 decorated rGO results in a highly active electrocatalyst for hydrogen evolution reaction compared to native Cu3SnS4. Cu3SnS4-rGO exhibits a lower overpotential and Tafel slope compared to Cu3SnS4, suggesting it follows a mixed Volmer and Heyrovsky mechanism for HER.
Metal sulphides combined with graphene/reduced graphene oxide (rGO) represent a unique class of materials for hydrogen generation either through electrocatalytic or photo(electro) catalytic methods. Herein, we report a solvothermal synthesis of Cu3SnS4 decorated rGO resulting in a highly active electrocatalyst for hydrogen evolution reaction (HER) compared to its native Cu3SnS4. The Cu3SnS4-rGO exhibited very low overpotential of 190 mV versus reversible hydrogen electrode (RHE), whereas Cu3SnS4 requires 250 mV versus RHE at a current density of 10 mA/cm(2). Tafel slope of Cu3SnS4-rGO and Cu3SnS4 is about 64 and 76 mV/dec, respectively. This suggests that Cu3SnS4-rGO is a better electrocatalyst when compared to Cu3SnS4 and follows mixed Volmer and Heyrovsky mechanism for HER.
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