Chapter 13: Photocatalytic CO₂ Reduction Reactions

Photocatalytic carbon dioxide (CO₂) reduction, which can convert renewable solar energy into high value-added fuels, offers a promising approach to alleviate global energy and environmental problems. In this chapter, the fundamentals of the photocatalytic CO₂ reduction mechanism are fully elaborated from the perspective of CO₂ reduction reaction pathways and photocatalyst design. The main influencing factors of photocatalytic CO₂ reduction activity and selectivity are analysed. An overview of recent advances for high-efficiency photocatalyst design is given from the aspects of light adsorption ability, photogenerated charge carrier separation and surface-active site properties. Finally, the remaining challenges and perspectives of photocatalytic CO₂ reduction reactions are presented.