Highly active hydrogen-rich photothermal reverse water gas shift reaction on Ni/LaInO${}_3$ perovskite catalysts with near-unity selectivity

Photo-assisted reverse water gas shift (RWGS) reaction is regarded green and promising in controlling the reaction gas ratio in Fischer Tropsch synthesis. But it is inclined to produce more byproducts in high H${}_2$ concentration condition. Herein, LaInO${}_3$ loaded with Ni-nanoparticles (Ni NPs) was designed to obtain an efficient photothermal RWGS reaction rate, where LaInO${}_3$ was enriched with oxygen vacancies to roundly adsorbing CO${}_2$ and the strong interaction with Ni NPs endowed the catalysts with powerful H${}_2$ activity. The optimized catalyst performed a large CO yield rate (1314 mmol g${}_{Ni}$${}^{-1}$ h${}^{-1}$) and ≈100 % selectivity. In situ characterizations demonstrated a COOH* pathway of the reaction and photoinduced charge transfer process for reducing the RWGS reaction active energy. Our work provides valuable insights on the construction of catalysts concerning products selectivity and photoelectronic activating mechanism on CO${}_2$ hydrogenation. (© 2023 Wiley‐VCH GmbH)