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Oxoboron Growth {BnNi6SiW9}2 (n = 0, 1, 2, 3) for Enhanced Visible-Light-Driven Photocatalytic Hydrogen Production
1MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China.
Abstract:
Boron is characterized by its small atomic radius, strong electron-accepting ability, and high electronegativity. Oxoboron (B-O) clusters can modify the coordination environment of transition metals, thereby tuning the band gap structure of catalysts and enhancing the light absorption properties of TMAPs. {BnNi6SiW9}2 (n = 0, 1, 2, 3, corresponding to compounds 1/2/3/4, respectively). As the number of boron atoms increased, the band gap structures of catalysts 1-4 were rapidly adjusted, with conduction band (CB) positions following the trend 4 < 3 < 2 < 1, leading to progressively enhanced photocatalytic performance. Additionally, the incorporation of B-O clusters enhanced light absorption in the near-infrared region, improving photothermal conversion.
