Heterogeneous Photocatalytic Hydrogenative Reactions Using Liquid Hydrogen Donors: Mechanisms, Catalysts Design, and Applications

Heterogeneous photocatalysis is a promising approach for a wide range of hydrogenative reactions owing to the mild reaction conditions and the possibility of employing liquid hydrogen donors. Currently, the major interest is focused on the development of high performance photocatalyst materials and the expansion of reaction scope. An overview from a perspective of hydrogen donor and thus the related mechanistic understanding of the light‐induced hydrogenative reactions is rare. Here, we have categorized the photocatalytic hydrogenative reactions by the type of employed liquid hydrogen donors (hydrocarbons and water), discussed the basic criteria of hydrogen ion from these donors, and elaborated the design strategy of the photocatalyst materials. This concept summarizes recent development in heterogeneous photocatalysis for hydrogenative reactions from the perspective of hydrogen donors. The basic criteria of hydrogen ion from organic molecule and water, donation to the target acceptor, and the design strategy of the photocatalyst materials are discussed.