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In-Situ Photodeposition of Highly Dispersed MoSx as a Co-catalyst on TiO2 Nanoparticles for Efficient and Stable Photocatalytic H2 Evolution

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Abstract

The development of new and efficient non-precious metal electronic additives is of great significance for the photocatalytic decomposition of water to produce hydrogen. Molybdenum sulfide is the most promising electronic assistant to replace the precious metal Pt. However, its weak electrical conductivity and rare unsaturated S atom active sites severely restrict the improvement of the photocatalytic hydrogen production efficiency. In this study, an amorphous molybdenum sulfide electronic promoter modified TiO2 (TiO2/a-MoSx) photocatalytic material was synthesized by the in-situ adsorption-photodeposition conversion method, aiming to improve the photocatalytic hydrogen production performance of semiconductor materials. The results of the photocatalysis experiments showed that, compared to pure TiO2 and a-MoSx photocatalysts, the TiO2/a-MoSx photocatalytic materials had a significantly improved photocatalytic hydrogen production performance, while TiO2/a-MoSx-8p photocatalysts had the best photocatalytic hydrogen production activity. The hydrogen evolution efficiency reached 35.2 mmol g−1 within two hours. At the same time, the analysis of the hydrogen production performance of four cycles showed that it had a good stability. The characterization results showed that the a-MoSx cocatalyst can not only increase the specific surface area of the catalyst and provide more active sites, but also effectively capture the photogenerated electrons of TiO2, thereby greatly improving the separation efficiency of the photogenerated charges and enhancing the catalytic activity. Therefore, this study provides a simple and effective strategy for the design of high-performance a-MoSx-based cocatalysts to stably carry out in-situ photocatalytic H2 release.

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Funding

This study was supported in part by the Hosokawa Powder Technology Foundation.

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Authors and Affiliations

  1. Advanced Ceramics Research Center, Nagoya Institute of Technology, Gifu, 507-0033, Japan

    Xinxin Jiang & Masayoshi Fuji

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  1. Xinxin Jiang
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  2. Masayoshi Fuji
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Correspondence to Xinxin Jiang.

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Jiang, X., Fuji, M. In-Situ Photodeposition of Highly Dispersed MoSx as a Co-catalyst on TiO2 Nanoparticles for Efficient and Stable Photocatalytic H2 Evolution. Catal Lett 152, 2247–2255 (2022). https://doi.org/10.1007/s10562-021-03807-1

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