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Demonstrates superior electrocatalytic hydrogen evolution in hierarchical MoS2 nanosheets, suggesting efficient alternatives to noble metals.
Two-dimensional transition-metal dichalcogenides are affordable alternatives to noble metal catalysts for hydrogen evolution reaction (HER). Here, we report a facile one-step solvothermal method to synthesize the 1T MoS 2 hierarchical nanosphere (NSP) that can function as an efficient and stable electrocatalyst for HER using an environment-friendly solvent without the assistance of a template or additive. The reaction solvent is found to play a vital role in regulating the morphology and phase of the resultant MoS 2 . A haystack of 2H MoS 2 nanosheets is obtained when water is used as the solvent, and the 1T MoS 2 NSP is attained when ethanol is used. The 1T MoS 2 NSP has a three-dimensional hierarchical structure and good conductivity, which lead to the excellent electrocatalytic HER performance in an acid solution with its overpotential lower than the reported MoS 2 -based electrocatalysts. It also demonstrates exceptional electrochemical stability, showing little variation in overpotential for 5000 reaction cycles.
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Wang et al. (2022) studied this question.
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