Issue 21, 2024

In situ fabrication of all amorphous TiO2-coupled-MoSx photocatalysts for on-demand photocatalytic hydrogen production by using UV light

Abstract

Intergrating in situ fabrication of photocatalysts with on-demand photocatalytic H2 evolution from water splitting holds immense promise for enhancing the H2 utilization efficiency. Herein, all amorphous TiO2-coupled-MoSx photocatalysts (a-TM) are in situ fabricated by hydrolyzing the Ti precursor followed by photochemical reduction of (NH4)2MoS4 in the reaction solution for on-demand photocatalytic H2 evolution reaction (HER). Thanks to the intimate contact between a-TiO2 and the a-MoSx cocatalyst, as well as abundant active sites on the a-MoSx cocatalyst, the photogenerated electrons can rapidly transfer from the excited a-TiO2 to the well-interconnected a-MoSx, leading to efficient charge separation, thereby greatly promoting the kinetics of the HER. The as-fabricated a-TM2 with 2 mol% a-MoSx exhibits the highest H2 evolution rate of 696.2 μmol h−1 under UV light, 2.7 times higher than that of benchmark P25 loaded with a 2 mol% a-MoSx cocatalyst (PM2). This work introduces a new concept of in situ fabricating semiconductor-based photocatalysts for on-demand photocatalytic HER at a large scale.

Graphical abstract: In situ fabrication of all amorphous TiO2-coupled-MoSx photocatalysts for on-demand photocatalytic hydrogen production by using UV light

Supplementary files

Article information

Article type
Communication
Submitted
06 Aug 2024
Accepted
16 Sep 2024
First published
20 Sep 2024

Sustainable Energy Fuels, 2024,8, 4907-4913

In situ fabrication of all amorphous TiO2-coupled-MoSx photocatalysts for on-demand photocatalytic hydrogen production by using UV light

Q. Dong, Y. Sun, F. Wang, Z. Zhang and S. Min, Sustainable Energy Fuels, 2024, 8, 4907 DOI: 10.1039/D4SE01079E

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