Rational design and mechanistic insights of advanced photocatalysts for CO2-to-C2+production:Status and challenges
Photocatalytic CO2 conversion into high-value chemicals is becoming an increasingly promising avenue of research in the quest for sustainable carbon resource utilization.Particularly,compounds with two or more carbons(C2+)have higher added value than methane,carbon monoxide,or for-mate,which are typically the major products of CO2 reduction.In this review,we present a detailed account of recent advancements in the field of photocatalytic CO2 conversion,with a specific focus on the synthesis of multi-carbon oxygenates.We systematically introduce the rational design of photocatalysts with high effectivity and selectivity,which follows a methodical inside-to-outside order.These strategies consider various aspects of photocatalyst optimization,from the core struc-ture to the surface properties.Meanwhile,we delve into an in-depth analysis of the underlying cat-alytic mechanisms,particularly emphasizing the C-C coupling and multi-electron-coupled proton transfer processes.Lastly,we examine the prospects and challenges in developing photocatalysts for CO2 conversion,providing valuable insights for researchers and practitioners.This review aims to serve as a valuable resource for those seeking to design advanced catalysts for efficient photo-catalytic CO2 reduction.
CO2 reductionC2+productPhotocatalysisActive siteReaction mechanism