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Solvothermal decoration of Cu 3 SnS 4 on reduced graphene oxide for enhanced electrocatalytic hydrogen evolution reaction
Author(s) -
Govindaraju Varsha Raj,
Sreeramareddygari Muralikirshna,
Hanumantharayudu Nagaraju Doddahalli,
Devaramani Samrat,
Thippeswamy Ramakrishnappa,
Surareungchai Werasak
Publication year - 2020
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13558
Subject(s) - electrocatalyst , overpotential , tafel equation , graphene , oxide , catalysis , materials science , inorganic chemistry , chemical engineering , hydrogen , metal , electrode , chemistry , nanotechnology , electrochemistry , metallurgy , organic chemistry , engineering
Abstract 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 Cu 3 SnS 4 decorated rGO resulting in a highly active electrocatalyst for hydrogen evolution reaction (HER) compared to its native Cu 3 SnS 4 . The Cu 3 SnS 4 ‐rGO exhibited very low overpotential of 190 mV versus reversible hydrogen electrode (RHE), whereas Cu 3 SnS 4 requires 250 mV versus RHE at a current density of 10 mA/cm 2 . Tafel slope of Cu 3 SnS 4 ‐rGO and Cu 3 SnS 4 is about 64 and 76 mV/dec, respectively. This suggests that Cu 3 SnS 4 ‐rGO is a better electrocatalyst when compared to Cu 3 SnS 4 and follows mixed Volmer and Heyrovsky mechanism for HER.