Abstract:

Solar-driven conversion of CO₂ and CH₄ to syngas is a very promising technology for producing renewable fuels. However, solar-driven CH₄ reforming catalysts suffer from low conversion efficiency, fast photogenerated electron-hole complexation rate and poor catalyst stability. This paper briefly describes the possible mechanisms of photocatalytic CO₂ and CH₄ reforming, including the adsorption of CO₂ and CH₄, the migration of photogenerated electrons and holes and the desorption of products. The research progress of precious metal catalysts, non-precious metal catalysts and carbon-nitrogen compounds for the photocatalytic CO₂ and CH₄ reforming is highlighted, and the advantages and shortcomings of these catalysts are also summarized. Finally, this paper discusses the possible development directions in the field of photocatalytic conversion of CO₂ and CH₄ to syngas, i.e. the development and design of efficient photocatalysts to improve the reaction efficiency, catalytic mechanism investigation by density functional theory (DFT) and advanced characterization techniques.

Key words: photocatalysis, carbon dioxide, methane reforming, conversion, carbon monoxide, catalyst

摘要：

太阳能驱动的CO₂与CH₄转化为合成气是一种非常有前景的生产可再生燃料的技术，然而太阳能驱动的CH₄重整催化剂存在转化效率低、光生电子与空穴复合速率快及催化剂稳定性差等问题。本文简述了光催化CO₂与CH₄重整的可能机理，包括CO₂和CH₄的吸附、光生电子与空穴的迁移及产物的脱附过程。重点介绍了光催化CO₂和CH₄重整过程中贵金属催化剂、非贵金属催化剂及碳氮化合物等催化剂的研究进展，并总结归纳了各类催化剂的优点与不足。最后，本文探讨了光催化转化CO₂与CH₄制合成气研究领域未来可能的发展方向：开发设计高效的光催化剂提高反应效率；通过密度泛函理论计算及高端表征技术探究催化机理。

关键词: 光催化, 二氧化碳, 甲烷重整, 转化, 一氧化碳, 催化剂