Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 97, Issue -, Pages 27-31Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2018.09.018
Keywords
Hydrogen evolution reaction; Electrocatalyst; MoP2 nanosheets
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Funding
- State Key Laboratory of Organic-Inorganic Composites [oic-201503005]
- Fundamental Research Funds for the Central Universities [buctrc201525]
- Beijing National Laboratory for Molecular Sciences [BNLMS20160133]
- State Key Laboratory of Separation Membranes and Membrane Processes (Tianjin Polytechnic University) [M2-201704]
- World Academy of Sciences [TWAS/16-072 RG/CHE/AF/AC_I]
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We report a new method for facile synthesis of MoP2 nanosheets for efficient electrocatalysis of the hydrogen evolution reaction (HER). The resulting MoP2 nanosheets catalyze the HER in 0.5M H2SO4 with an overpotential of 150 mV being required to deliver a current of 10 mA cm(-2), and a Tafel slope of 81.5 mV dec(-1) indicating prevalence of a Volmer-Heyrovsky mechanism and hence H-2 desorption as the rate limiting step of the reaction. The HER overpotential remained nearly constant after over 1000 cycles of continuous cyclic potential polarization between 0.0 V and -0.4 V, and 10 h of chronoamperometric polarization at an overpotential of 150 mV. This work expands the synthetic methods for MoP2 nanosheets as active, acid-stable and non-noble-metal HER catalysts for large-scale hydrogen production.
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