Recent Advances in Heterogeneous Photocatalytic CO 2 Conversion to Solar Fuels

作者：Kan Li, Bosi Peng, Tianyou Peng · 发表于：ACS Catalysis · 年份：2016 · DOI：10.1021/acscatal.6b02089 · 被引用次数：1354 · 研究领域：Advanced Photocatalysis Techniques、CO2 Reduction Techniques and Catalysts、Ammonia Synthesis and Nitrogen Reduction

As a promising approach to achieving two objectives with one strategy, photocatalytic CO 2 conversion for C1/C2 “solar fuels” production can provide a package solution to the current global warming and growing energy demand by using inexhaustible solar energy and increasing atmospheric CO 2 . Although numerous efforts have been made to enhance the CO 2 conversion efficiency through developing photocatalysts and CO 2 reduction systems in recent years, some challenges still remain in improving the activity and selectivity of the CO 2 photoreduction reactions. This review gives an overview of fundamental aspects and recent research advances of heterogeneous photocatalytic CO 2 conversion systems in the last 3 years, and the catalysts are categorized as one-step excitation semiconductor systems, one-step excitation photosensitized semiconductor systems, and two-step excitation hybrid systems such as semiconductor heterojunction and Z-scheme systems. Also, some suggestions are given for further confirming that the carbon-containing “solar fuels” are derived from CO 2 rather than from the possible carbonaceous impurities in the photocatalytic system, because most of the papers cited in this review have not demonstrated that CO 2 is the actual carbon source for photoreduction through 13 CO 2 labeling or other techniques. Lastly, a short perspective on the challenges and new directions in this field is proposed, which would be of great interest for the further improvements of activit...