C_(60)-MoP-C纳米花范德瓦耳斯异质结及其电催化析氢性能

C_(60)⁃MoP⁃C nanoflowers van der Waals heterojunctions and its electrocatalytic hydrogen evolution performance

采用气固法制备了磷化钼-碳纳米花(MoP-CFs),通过简单的超声自组装将C_(60)修饰在MoP-CFs表面,形成范德瓦耳斯异质结。研究其电催化析氢性能发现,C_(60)的修饰能够有效降低电催化析氢过电位。其中,10%C_(60)-MoP-CFs样品(10%为C_(60)的质量分数)表现出最佳催化活性,在酸性和碱性条件下达到10 mA·cm^(-2)的电流密度时,所需要的过电位分别为158和157 mV,并且具有至少20 h的电催化稳定性。C_(60)与MoP-CFs之间强电子耦合作用促进电子由C_(60)迁移到MoP-CFs表面,有助于减小电荷传输阻力,加快电催化析氢界面反应动力学过程。

Molybdenum phosphide-carbon nanoflowers(MoP-CFs)were prepared by the gas-solidification method,and C_(60) was modified on the surface of MoP-CFs to form van der Waals heterojunctions by simple ultrasonic selfassembly.It is found that the modification of C_(60) can effectively reduce the overpotential of electrocatalytic hydrogen evolution.Among all samples,10%C_(60)-MoP-CFs(10%was the mass fraction of C_(60))exhibited the best catalytic activity with overpotentials of 158 and 157 mV to achieve a current density of 10 mA·cm^(-2) in acidic and alkaline conditions,respectively.Moreover,this sample also showed good stability which could work stably for more than 20 h.The strong electron coupling between C_(60) and MoP-CFs promotes electron migration from C_(60) to the surface of MoP-CFs,reduces the charge transport resistance,and accelerates the electrocatalytic hydrogen evolution interface reaction kinetics process.