Enhanced Solar-Driven Gaseous CO2 Conversion by CsPbBr3 Nanocrystal/Pd Nanosheet Schottky-Junction Photocatalyst

In this report, a novel zero-dimensional CsPbBr3 nanocrystal (CsPbBr3 NC)/two-dimensional Pd nanosheet (Pd NS) composite photocatalyst is prepared to afford efficient and stable photocatalytic gaseous CO2 reduction in the presence of H2O vapor under visible light illumination. Pd NS herein acts as an electron reservoir to quickly separate the electron-hole pairs in CsPbBr3 NC through a Schottky contact, and provides an ideal site for CO2 reduction reactions. A highest electron consumption rate of 33.79 mu mol g(-1) h(-1) is achieved by the CsPbBr3 NC/Pd NS composite, which corresponds to a 2.43-fold enhancement over pristine CsPbBr3 NC (9.86 mu mol g(-1) h(-1)), thus providing a practical and universal solution for the halide perovskite materials to boost the photocatalytic performance through semiconductor/metal design.