Lead‐Free Cs3Bi2I9 Perovskite‐Like Material as Efficient Photocatalyst for Improved Hydrogen Evolution in Presence of Platinum Co‐Catalyst

Abstract

AbstractHerein, we have reported the synthesis of Cs3Bi2I9 MHPs using simple protocols and strategies. Further, crystalline nature and phase of the as‐synthesized Cs3Bi2I9 MHPs were examined by exploring XRD and XPS methods. The surface morphological properties of Cs3Bi2I9 MHPs were determined by SEM study. XPS technique was used to verify the phase purity and elemental composition of Cs3Bi2I9 MHPs. Furthermore, we have used as‐synthesized Cs3Bi2I9 MHPs as suitable photo‐catalyst for hydrogen evolution reaction. The Cs3Bi2I9 MHPs exhibits decent results for H2 production. However, introduction of Pt co‐catalyst with Cs3Bi2I9 MHPs boosted the photo‐catalytic hydrogen generation. The obtained results exhibited the generation of excellent H2 amount of 301.45 and 1249.25 μmol g−1 using Cs3Bi2I9 MHPs and Cs3Bi2I9 MHPs+2 mg Pt, respectively. The obtained results exhibits that Cs3Bi2I9 MHPs and Cs3Bi2I9 MHPs+2 mg Pt possess excellent cyclic stability and can be reuse for further photo‐catalytic H2 evolution. Cs3Bi2I9 MHPs+Pt (2.0 mg) also exhibited excellent H2 evolution amount and rate in presence of H3PO2. The obtained results in this study are the important steps towards the H2 evolution using Cs3Bi2I9 MHPs.