Recent Advances and Challenges in Efficient Selective Photocatalytic CO Methanation.

Solar-driven carbon dioxide (CO) methanation holds significant research value in the context of carbon emission reduction and energy crisis. However, this eight-electron catalytic reaction presents substantial challenges in catalytic activity and selectivity. In this regard, researchers have conducted extensive exploration and achieved significant developments. This review provides an overview of the recent advances and challenges in efficient selective photocatalytic CO methanation. It begins by discussing the fundamental principles and challenges in detail, analyzing strategies for improving the efficiency of photocatalytic CO conversion to CH comprehensively. Subsequently, it outlines the recent applications and advanced characterization methods for photocatalytic CO methanation. Finally, this review highlights the prospects and opportunities in this area, aiming to inspire CO conversion into high-value CH and shed light on the research of catalytic mechanisms.