Synergetic bimetallic catalysts: A remarkable platform for efficient conversion of CO2 to high value-added chemicals

Carbon dioxide reduction reaction (CO2RR) represents an efficient approach to achieving carbon neutrality and simultaneously generating clean energy. However, the strong stability of CO2 molecules and the diversity of products pose significant challenges. As an emerging material, bimetallic catalysts have been widely reported for their unique advantages, such as tunable electronic structures, suitable adsorption/desorption of CO2 and intermediates, and optimizable d-band centers of active sites through bimetallic synergy. These catalysts provide a remarkable platform for converting CO2 into high value-added chemicals. This review comprehensively summarizes recent research advances in bimetallic catalysts for CO2RR. Firstly, the challenges associated with CO2RR, including activity and selectivity are analyzed, followed by a discussion on the unique advantages of bimetallic catalysts. Next, their synthesis strategies are categorized into dual-atom site catalysts (DACs), bimetallic nanoparticles and nanoclusters, binary metal semiconductors, and layered double hydroxides (LDHs). Additionally, advanced characterization techniques of bimetallic catalysts and their applications in CO2RR are thoroughly introduced. Finally, the prospects and challenges for the application of bimetallic materials are highlighted. This review aims to provide inspiration for CO2RR into high-value chemicals and shed light on the research of bimetallic materials.