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Dual-heterophase MoS2-MoC@rGO cocatalyst with rapid electron transfer and interfacial H2-evolution reaction toward efficient photocatalytic activity of TiO2 by Miaomiao Pan; Lulu Gao; Ping Wang; Xuefei Wang; Huogen Yu is a Materials Science article available to read on EtoBox.

What is Dual-heterophase MoS2-MoC@rGO cocatalyst with rapid electron transfer and interfacial H2-evolution reaction toward efficient photocatalytic activity of TiO2 about?

Cubic molybdenum carbide (MoC) as a non-noble cocatalyst has been extensively reported in the area of photocatalytic H2 generation because of its comparable H+-adsorption ability to noble-metal Pt. However, its relatively low conductivity and insufficient content of hydrogen-evolution active sites lead to a limited H2-generation activity of MoC-based photocatalysts. Considering that the introduction of graphene nanosheets and MoS2 is beneficial to promoting electron transfer and increasing interfacial H2-evolution active sites, in this article, MoS2-MoC (inner heterophase) was grown on reduced graphene (rGO) as an outer-heterophase support to construct dual-heterophase MoS2-MoC@rGO cocatalyst for the enhanced hydrogen-production performance of TiO2. Herein, MoS2-MoC@rGO cocatalysts were first synthesized by controlling a ratio between the materials (GO, (NH4)6Mo7O24 and thiourea) during one-step calcination, and further coupled with the TiO2 to prepare the MoS2-MoC@rGO/TiO2 via a simple sonication method. The hydrogen-production test indicated that the highest H2-production rate of MoS2-MoC@rGO/TiO2 reached 575 μmol h−1 g−1 (AQE = 1.73%), which was 58, 3.6 and 2.1 times of that for

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Author

Miaomiao Pan; Lulu Gao; Ping Wang; Xuefei Wang; Huogen Yu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)