Ultrathin nanosheet ZnIn2S4-Encapsulated Rich-Mo Edge Active Site Mo2C-N Schottky Junction
The development of efficient multifunctional catalyst remains a huge challenge due to their unsatisfactory ox-
ygen/hydrogen intermediate species adsorption, ineffective kinetics rate, lack of active reaction sites. Herein,
rich-Mo edge active sites in the molybdenum carbide (Mo2C) were created through nitrogen doping, which was
used as cocatalyst to enhance the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and
photocatalytic hydrogen evolution (PHE) of ZnIn2S4 (ZIS). Mo2C-N/ZIS affords a remarkable HER activity with a
low overpotential of 74 mV as well as excellent OER activity with a reduced overpotential of 250 mV at
10 mA?cm 2
. The formed Schottky junction between Mo2C-N/ZIS are responsible for the enhanced PHE/HER/
OER activity, which owns double transfer route beneficial to enhancing separation of photogenerated carriers
and reducing bulk/surface recombination of ZIS. Specially, the density functional theory (DFT) calculations
demonstrate that Mo2C-N/ZIS Schottky junction with optimal absorption energy for the hydrogen and oxygen
intermediates.