具备高效析氢催化效率的三维多孔氮化钒八面体催化剂（英文）

Three-Dimensional Porous VN Octahedron Catalyst with High Electrocatalytic Efficiency toward Hydrogen Evolution Reaction

随着中国经济和社会的快速发展,能源需求和环境污染问题也日益渐长.发展和开发高效清洁的新能源燃料可以有效地缓解能源危机和环境污染.如今,研发高效、环境友好和低成本的催化剂仍是析氢反应的研究重点.在此项研究中,作者首先通过煅烧处理方式制备了一种三维多孔的氮化钒八面体结构型的催化剂.该催化剂具备高效的析氢效率,包括较低的过电位94.0 mV(在-10 mA·cm-2时),塔菲尔斜率为54.6 mV·dec-1,以及在酸性条件80小时展现出的优良稳定性,该氮化钒的析氢催化效率优于许多报道过的氮化物,其优良的催化效率可以归因于它独一无二的自身性质和大量的活性位点.

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.