C60-MoP-C nanoflowers van der Waals heterojunctions and its electrocatalytic hydrogen evolution performance
Molybdenum phosphide-carbon nanoflowers(MoP-CFs)were prepared by the gas-solidification method,and C60 was modified on the surface of MoP-CFs to form van der Waals heterojunctions by simple ultrasonic self-assembly.It is found that the modification of C60 can effectively reduce the overpotential of electrocatalytic hydrogen evolution.Among all samples,10％C60-MoP-CFs(10％was the mass fraction of C60)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 C60 and MoP-CFs promotes electron migration from C60 to the surface of MoP-CFs,reduces the charge transport resistance,and accelerates the electrocatalytic hydrogen evolution interface reaction kinetics process.
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