Ultrafine molybdenum carbide nanoparticles supported on nitrogen doped carbon nanosheets for hydrogen evolution reaction

作者：Xia, Kedong; Guo, Junpo; Xuan, Cuijuan; Huang, Ting; Deng, Zhiping; Chen, Lingxuan; Wang, Deli^*

来源：Chinese Chemical Letters, 2019, 30(1): 192-196.

DOI：10.1016/j.cclet.2018.05.009

• Molybdenum carbides
• Ultrafine nanoparticles
• Nitrogen doping
• Carbon naonosheets
• Hydrogen evolution reaction

Molybdenum carbides (MoxC)/nitrogen doped carbon nanosheets (NCS) composites are synthesized via simple mixing melamine and ammonia molybdate, followed by a high-temperature treatment. Metal carbide nanoparticles with ultra-small size (13 nm) are uniformly supported on nitrogen doped carbon nanosheets. The hydrogen evolution reaction (HER) is investigated in both 0.5 mol/L H2SO4 and 1 mol/L KOH media. Mo2C/NCS-10 (melamine/ammonia molybdate weight ratio of 10:1) exhibits excellent performance with a low overpotential of 130 mV in 0.5 mol/L H(2)SO(4 )solution and 108 mV in 1 mol/L KOH solution at the current density of 10 mA/cm(2) . The better electrocatalytic activity could be ascribed to N-doped carbon nanosheets, small particle size, mesoporous structure, and large specific surface area, which could provide the large electrochemical active surface area and facilitate mass transport.

• 出版日期2019-1
• 单位华中科技大学