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Tungsten-doped MoS2-based nanostructure for photocatalytic hydrogen evolution under visible light

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Abstract

In this work, we introduced a simple approach to boost the photocatalytic activity of MoS2 by introducing transition metal (W) doping. The W-MoS2 (10 mg) exhibited a substantial enhancement in photocatalytic activity for H2 production, achieving an impressive rate of approximately 925 µmol g−1 after 6 h, which is 1.5-fold higher than bare MoS2. The highest H2 production activity of 1740 µmol g−1 after 6 h was obtained for 50 mg W-MoS2 photocatalyst. The observed increase in activity can be ascribed to the formation of a Schottky barrier at the heterojunction interface, along with advantageous properties of improved active sites resulting from tungsten doping into MoS2. Furthermore, the enhanced activity of W-MoS2 may be attributed to the promotion of catalytic kinetics by tungsten and molybdenum sites, exhibiting commendable activity for water dissociation and higher efficiency in H+ adsorption. These factors contribute significantly to the overall improved performance of the W-MoS2 photocatalyst. Further, platinum (Pt) was also used as cocatalyst and enhanced photocatalytic activity of 2145 µmol g−1 after 6 h was observed for W-MoS2 + 5 wt% Pt.

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Acknowledgements

R.A.K gratefully acknowledged Researchers Supporting Project (Project number, RSP2024R400), King Saud University, Riyadh, Saudi Arabia.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea

    Khursheed Ahmad

  2. Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany

    Waseem Raza & Mohd Quasim Khan

  3. Department of Chemistry, M.M.D.C, M.J.P. Rohilkhand University, Moradabad, Bareilly, Uttar Pradesh, 244001, India

    Khursheed Ahmad, Waseem Raza, Mohd Quasim Khan & Rais Ahmad Khan

  4. Department of Chemistry, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia

    Rais Ahmad Khan

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  1. Khursheed Ahmad
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  2. Waseem Raza
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Correspondence to Mohd Quasim Khan.

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Ahmad, K., Raza, W., Khan, M.Q. et al. Tungsten-doped MoS2-based nanostructure for photocatalytic hydrogen evolution under visible light. Reac Kinet Mech Cat (2024). https://doi.org/10.1007/s11144-024-02627-9

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  • DOI: https://doi.org/10.1007/s11144-024-02627-9

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