太阳能光电催化还原CO_2的最新研究进展

Research progress of CO_2 photoelectrocatalysis

为了将温室气体CO2进行资源化利用,综述了太阳能转化CO2制取高值化工品和替代燃料的最新研究进展.介绍光电催化还原CO2的反应原理,指出与其他转化方式相比的优势.对于光催化与电化学的耦合反应体系、p型半导体催化剂、过渡金属催化剂、配合物催化剂如金属-四氮杂大环及吡啶型配合物、反应评价指标如反应过电位、法拉第电流效率以及电流密度等方面的国际最新研究进展进行重点评述.总结了CO2光电催化过程中的热力学和动力学难题,从中间态产物势能分布的角度对该问题的解决方案提出了建议.

In order to reutilize greenhouse gas CO2 as resource, the latest research progress of high-value chemicals and alternative fuels produced from CO2 using solar energy was reviewed. Reaction mechanisms and technical advantages of CO2 photoelectrocatalysis were introduced. Coupled reaction systems of photocatalytic and electrocatalytic reduction, p-type semiconductor photocatalysts, transition metal and complexes eletrocatalysts （e. g. tetraazamacrocycle and pyridine complexes）, key indicators （e. g. overpotential, Faradaic efficiency and current density） were comprehensively discussed based on the latest literatures. The thermodynamic and kinetic challenges of CO2 photoelectrocatalytic reaction were summarized. It was proposed to study energy landscapes of intermediates formed in CO2 electrochemical reduction to solve these problems.