Ultrafine Co6Mo6C nanocrystals on reduced graphene oxide as efficient and highly stable electrocatalyst for hydrogen generation |
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Authors: | Chunyong He Shengkai Zhang Juzhou Tao Yongfu Qiu |
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Affiliation: | 1. Dongguan Neutron Science Center, Dongguan 523803, China;2. Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China;3. School of Environmental and Civil Engineering, Dongguan University of Technology, Guangdong 523808, PR China |
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Abstract: | Up to now, it is still a great challenge to develop active, durable and low-cost non-precious metal catalysts toward hydrogen evolution reaction (HER). In this paper, we synthesized ultrafine Co6Mo6C nanocrystals on reduced graphene oxide (RGO) support (Co6Mo6C/RGO). The Co6Mo6C/RGO shows Pt-like HER performance, which exhibits almost zero onset overpotential, and very small overpotential of 64 mV at 10 mA cm?2. In addition, the Co6Mo6C/RGO has a very small Tafel slope of 44 mV dec?1 and a high exchange current density of 0.402 mA cm?2, suggesting fast reaction kinetics. Furthermore, the Co6Mo6C/RGO demonstrates superior durability in acid electrolyte. The distinguished HER performance makes Co6Mo6C/RGO the promising candidate as non-precious metal catalyst for HER in acid electrolyte. |
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Keywords: | Ultrafine Bimetallic carbide Electrocatalyst Hydrogen evolution reaction Water splitting |
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