关键词: 氮化物（氮化钒）, 多孔催化剂, 活性位点, 析氢反应

Abstract: With the rapid development of China’s economy, the demand for energy is increasing, and environmental problems are becoming more and more serious. The development and utilization of highly-clean new energy fuel can effectively alleviate the energy crisis and environmental pollution. Nowadays, exploring high-efficiency, environment-friendly and low-cost catalysts remains the focus of research in the hydrogen evolution reaction (HER). In this research, firstly, we proposed a three-dimensional porous vanadium nitride (VN) with octahedral structure, which was prepared by a calcination treatment method. The VN catalyst showed a good electrocatalytic activity toward HER, involving a small overpotential of 94.0 mV at -10 mA·cm^-2, a corresponding low Tafel slope of 54.6 mV·dec^-1 and a great stability in an acidic medium for 80 h, which is much better than many reported nitrides. Moreover, the outstanding catalytic performance of VN toward HER could be ascribed to its unique composition nature and numerous active sites.

Key words: nitrides, porous catalyst, active sites, hydrogen evolution reaction