MoSe2 nanosheets and their graphene hybrids: synthesis, characterization and hydrogen evolution reaction studies
- Tang, Hao
- Dou, Kunpeng
- Kaun, Chao-Cheng
- Kuang, Qing
- Yang, Shihe
DOIAbstract
MoSe2 nanosheets and MoSe2/graphene hybrids have been prepared by a facile hydrothermal method. The number of layers of the MoSe2 nanosheets is typically <10 as confirmed directly by transmission electron microscopy and indirectly by a red shift of the characteristic A(1g) Raman peak. The hydrogen evolution reaction ( HER) studies show that the onset potentials of MoSe2 and MoSe2/RGO hybrids are only similar to 0.15 V vs. RHE and similar to 0.05 V vs. RHE, respectively, about 20-30 mV lower than those of MoS2 and its graphene hybrids reported previously. Density functional theory calculations reveal that the Gibbs free energy for atomic hydrogen adsorption (Delta G(H)(0)) on MoSe2 edges is closer to thermoneutral than that on MoS2, with an ...
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