【摘 要】
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Hexagonal molybdenum carbide (Mo2C) as an effective non-noble cocatalyst is intensively researched in the photocatalytic H2-evolution field owing to its Pt-like
【机 构】
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School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;School
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Hexagonal molybdenum carbide (Mo2C) as an effective non-noble cocatalyst is intensively researched in the photocatalytic H2-evolution field owing to its Pt-like H+-adsorption ability and good conductivity.However,hexagonal Mo2C-modified photocatalysts possess a limited H2-evolution rate because of the weak H-desorption ability.To further improve the activity,cubic MoC was introduced into Mo2C to form the carbon-modified MoC-Mo2C nanoparticles (MoC-Mo2C@C) by a calcination method.The resultant MoC-Mo2C@C (ca.5 nm) was eventually coupled with TiO2 to acquire high-efficiency TiO2/MoC-Mo2C@C by electrostatic self-assembly.The highest H2-generation rate of TiO2/MoC-Mo2C@C reached of 918 μmol·h-1·g-1,which was 91.8,2.7,and 1.5 times than that of the TiO2,TiO-2/MoC@C,and TiO2/Mo2C@C,respectively.The enhanced rate of TiO2 attributes to the carbon layer as cocatalyst to transmit electrons and the hetero-phase MoC-Mo2C as H2-generation active sites to boost H2-evolution reaction.This research offers a novel insight to design photocatalytic materials for energy applications.
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