Abstract
• Porous Mo 2 C@C nanoparticles are designed and synthesized. • The optimized Mo 2 C@C-Pt/C composite delivers excellent HER electrocatalytic performance. • Effects of Pt/C addition on electrocatalytic performance of Mo 2 C@C are discussed. Developing highly-efficient, low-cost and stable hydrogen evolution reaction (HER) electrocatalyst plays an important role in the strategy to develop hydrogen energy. Herein, molybdenum carbide nanoparticles embedded in porous carbon were facilely synthesized by calcining the mixture of ammonium molybdate, melamine and glucose. When mixed in proportion with commercial Pt/C, the optimized sample exhibits outstanding electrocatalytic activity with low overpotential, small Tafel slope and excellent stability for HER in acidic media.
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