Tailoring Inorganic Halide Perovskite Photocatalysts toward Carbon Dioxide Reduction

In recent years, photocatalytic carbon dioxide reduction has emerged as an attractive strategy to settle the global warming and energy crisis by converting CO2 into valuable chemicals utilizing solar energy. All-inorganic halide perovskites (PVKs), as a class of promising light-harvesting materials with outstanding optoelectronic properties and considerable stabilities, have received dramatic attention in the field of photocatalytic CO2 reduction reaction (CO2RR). In this review, the recent progress of PVK catalysts for CO2RR is systematically summarized and evaluated according to the modification strategies and their mechanisms. The working principles of CO2RR are first introduced. The main strategies for improving the photoelectrochemical performance are then discussed and their recent developments are summarized. Finally, the current challenges, including instability, charge recombination, and insufficient active sites, and future research opportunities for further development are addressed.