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Photocatalytic hydrogen evolution can effectively alleviate the troublesome global energy crisis by converting solar energy into the chemical energy of hydrogen. In order to realize efficient hydrogen generation, a variety of semiconductor materials have been extensively investigated, including TiO2, CdS, g‐C3N4, metal‐organic frameworks (MOFs), and others. In recent years, to achieve higher photocatalytic performance and reach the level of large‐scale industrial applications, photocatalysts decorated with transition metal phosphides (TMPs) have shone brightly because of their low cost, stable physical and chemical properties, and substitution for precious metals of TMPs. This Review highlights the preparation methods and properties associated with photocatalysis of TMPs. Moreover, the H2 generation efficiency of photocatalysts loaded with TMPs and the roles of TMPs in catalytic systems are also studied systematically. Apart from being co‐catalysts, several TMPs can also serve as host catalysts to boost the activity of photocatalytic composites. Finally, the development prospects and challenges of TMPs are put forward, which is valuable for future researchers to expand the application of TMPs in photocatalytic directions and to develop more active photocatalytic systems.

Photoreduction of CO 2 can effectively alleviate the troublesome global energy crisis and environmental problems by converting CO 2 into hydrocarbons. Due to the discovery of photocatalysts that can respond to infrared light, the application of full spectrum in photocatalysis has attracted many researchers. This review comprehensively summarizes the progress in CO 2 photocatalytic reduction based on full-spectrum photocatalytic systems, and the basic theory of photoresponse, the mechanism of photocatalysis and photoreduction of CO 2 , and the representative photocatalytic materials working under ultraviolet, visible, and infrared irradiation are discussed. The strategies and related mechanisms of realizing full-spectrum photocatalysis are introduced, and the contribution of photoreactors to CO 2 photocatalytic reduction is also mentioned. Finally, the application prospects of light-driven reactions in CO 2 reduction are prospected. It is hoped that this review can offer clearer guidance for CO 2 reduction and construction of full spectrum-driven photocatalyst for efficient photocatalytic CO 2 reduction in the future.

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