A water-stable organolead iodide material for overall photocatalytic CO2 reduction
Rong Chen, Guodong Gao, Jingshan Luo
Abstract
The utilization of perovskites as photocatalysts to convert CO 2 into fuels and chemicals has received wide attention recently. However, their instability in water hinders their long-term application for overall photocatalytic CO 2 reduction. Herein, we integrate the water-stable perovskite-like organolead iodide crystalline material [Pb 8 I 8 (H 2 O) 3 ] 8+ [ − O 2 C(CH 2 ) 4 CO 2 − ] 4 (TJU-16) with Au co-catalyst for photocatalytic CO 2 reduction in aqueous solution without sacrificial reagent. Under the AM 1.5 G simulated illumination, the TJU-16 with 0.19 wt.‰ Au co-catalyst steadily generated electrons for CO 2 reduction reaction, which was 2.2 times of pure TJU-16. The Au 0.19 /TJU-16 catalyzed CO 2 reduction at a rate of 84.2 µmol·g −1 ·h −1 , and achieved a solar-to-fuel (STF) conversion efficiency of 0.034%. Our work will motivate the rational design of water-stable perovskite-like materials for photocatalytic applications.