热助光催化CO_(2)还原研究进展与展望

Progress and prospect of thermal assisted photocatalytic CO_(2) reduction

光热催化是一种极具前途的CO_(2)还原策略,可利用太阳光谱的广泛吸收来激发热化学和光化学过程的结合,从而协同推动催化反应的进行,使CO_(2)在较为温和的条件下实现高效转换。作为光热催化的一种,在光催化中引入热能,可提高太阳光利用率,促进载流子的激发和分离,加快反应分子扩散,提升反升性能。对当前光热催化CO_(2)还原的概念和原理进行分类,并对热助光催化还原CO_(2)反应的研究现状进行总结。基于反应产物的差异,介绍热助光催化反应的催化剂选择、反应条件和反应机理,同时介绍了该类反应试验过程中关键的局部测温技术,最后对热助光催化CO_(2)还原技术的发展进行了展望,未来的研究重点应是提升CO_(2)转化率和产物选择性,同时利用先进的原位表征技术和理论计算对反应机理进行探究。

Photothermal catalysis is a promising strategy for CO_(2) reduction,which can use the broad absorption of solar spectrum to stimu⁃late the combination of thermochemical and photochemical processes,so as to promote the catalytic reaction and realize the efficient conver⁃sion of CO_(2) under mild conditions.As a kind of photothermal catalysis,the introduction of heat energy into photocatalysis can improve the utilization of sunlight,promote the excitation and separation of carriers,and accelerate the diffusion of reaction molecules,and improve the reverse lift performance.In this paper,the concept and principle of photocatalytic CO_(2) reduction were classified,and the research status of thermally assisted photocatalytic reduction of CO_(2) was summarized.Based on the difference of reaction products,the selection of catalyst,reaction conditions and reaction mechanism of thermally assisted photocatalytic reaction were introduced.In addition,the key technology of local temperature measurement in photothermal reaction experiment was also introduced.Finally,the development of photocatalytic CO_(2) re⁃duction technology was prospected.The focus of future research should improve CO_(2) conversion and product selectivity,and explore the re⁃action mechanism by using advanced in-situ characterization technology and theoretical calculation.