Hydrothermal Synthesis of MA3Sb2I9 for Hydrogen Production Applications

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Abstract
With increasing energy demands and environment concerns, the substitution of lead hybrid perovskites with antimony‐based perovskite structures is an important research topic. Herein we report the synthesis of a lead‐free perovskite‐like material MA3Sb2I9 by a hydrothermal method and the photocatalytic performance of the material in the hydrogen evolution reaction (HER). The synthesized material MA3Sb2I9 has been characterized by PXRD, SEM, EDX and UV‐Vis absorption spectroscopy. The band gap of the synthesized material was observed to be 2.28 eV. MA3Sb2I9 demonstrated good catalytic performance for the splitting of HI using hypophosphorous acid (H3PO2) as scavenger. For enhancing the rate of hydrogen evolution, platinum nanoparticles have been used as a co‐catalyst in different ratios. The hydrogen evolution performance of MA3Sb2I9 enhanced up to 883 μmol g−1 upon addition of 3 mg of Pt nanoparticles due to generation of additional Fermi levels in the catalytic system. The MA3Sb2I9 material demonstrated good stability showing no evident reduction in catalytic activity after four consecutive cycles.
Funding Information
  • King Saud University
  • National Research Foundation of Korea (NRF-2022R1A2C1005585)

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