Recent progress and understanding on In2O3-based composite catalysts for boosting CO2 hydrogenation

[Display omitted] •In2O3 has been used as support, promoter and active center for catalytic CO2 hydrogenation.•In2O3-based catalysts have outstanding activity, selectivity and stability to CO2 hydrogenation.•Interfaces on In2O3-based catalysts are the most favorable for CO2 adsorption and hydrogenation. Catalytic hydrogenation of CO2 into valuable chemicals, e.g. CH3OH, has been among the greatest concerns for both scientific and industrial communities, due to its crucial role in solving the serious CO2-related problems. In2O3-based composite catalysts have attracted great attentions due to their outstanding activity, selectivity and stability towards CO2 hydrogenation, in both thermocatalysis and photocatalysis. The present review summarizes the recent progress on In2O3-based composite catalysts for boosting CO2 hydrogenation. Strategies for improving the performance of In2O3-based composite catalysts are discussed. Hydrogenation mechanisms of CO2 on In2O3-based composite catalysts are analyzed. Future research opportunities and challenges are shown at the end of this review. The present review will stimulate more deep insights on In2O3-based composite catalysts for achieving more efficient CO2 conversion.