Engineering the Charge Density on an In2.77S4/Porous Organic Polymer Hybrid Photocatalyst for CO2-to-Ethylene Conversion Reaction

• DOI: 10.1021/jacs.2c10351
• Publication Date: 2022-12-20T10:45:52Z
• Authors: Risov Das; Ratul Paul; Arko Parui; Abhijit Shrotri; Cesare Atzori; Kirill A. Lomachenko; Abhishek Kumar Singh; John Mondal; Sebastian C. Peter
• Keywords: Carbazole; X-ray absorption spectroscopy

The development of an efficient photocatalyst for C2 product formation from CO2 is urgent importance toward the deployment solar-fuel production. Here, we report a template-free, cost-effective synthetic strategy to develop carbazole-derived porous organic polymer (POP)-based composite catalyst. catalyst comprised In2.77S4 and (POP) held together by induced-polarity-driven electrostatic interaction. Utilizing synergy catalytically active In centers light-harvesting POPs, showed 98.9% selectivity generation C2H4, with rate 67.65 μmol g-1 h-1. Two different oxidation states spinel were exploited C-C coupling process, this was investigated X-ray photoelectron spectroscopy (XPS), absorption (XAS), density functional theory (DFT) calculations. role POP elucidated via several photophysical photoelectrochemical studies. electron transfer mapped correlated approaches, which assisted in establishing Z-scheme mechanism. Furthermore, mechanism C2H4 extensively using calculations multiple possible pathways.