光电催化分解水和还原CO2研究进展

Progress of photoelectrocatalytic water splitting and CO2 reduction

介绍了光电催化(PEC)分解水和还原CO2的基本原理、研究进展。探讨了提高PEC效率的关键策略,主要包括通过能带调控、形貌控制和敏化提高光吸收,通过助催化剂促进表面反应,以及通过构建局部偶极或异质电场、形貌调控和界面修饰促进电荷分离与传输等。

Photoelectrocatalytic(PEC) water splitting for H2 production and CO2 reduction for fuel production are important ways for solar energy conversion and utilization. However, the PEC efficiency is limited by problems such as poor light absorption,high overpotential and sluggish kinetics of surface reaction, and serious recombination of photogenerated carriers. Herein, we describe the principles of PEC water splitting and CO2 reduction, recent progress and strategies on increasing the PEC efficiency,including enhancing light absorption via energy band engineering, morphology control and sensitizing strategy, promoting surface reaction via loading cocatalyst, enhancing charge separation and transfer via introducing local dipole and heterojunction electric field, morphology control, interface engineering, etc.