Abstract
Defect-rich MoS2/r-GO hybrids are successfully synthesized via microwave-assisted solvothermal process, and their electrocatalytic properties for hydrogen evolution reaction (HER) are evaluated. The hybrids exhibit low overpotential of 86 mV at 10 mA cm−2, with a Tafel slope of 44 mV dec−1 as well as promising long-term stability. The activation energy required by HER is 25.4 kJ/mol, and the faraday efficiency reaches 86.3% at −0.16 V (vs. RHE). The attractive performance can be attributed to the abundant defects generated in highly disordered MoS2 phase, which help to expose a large number of active sites. In addition, the interaction between r-GO and MoS2 particles promotes the charge transfer process. This work provides a simple strategy for the rational design and mass fabrication of defect-rich MoS2-based electrocatalysts for hydrogen evolution reaction.
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