Water nanodomains for efficient photocatalytic CO reduction to CO

Herein we propose the utilization of nanosized water domains for photocatalytic CO 2 conversion, by which CO 2 can be efficiently reduced to CO with a CO evolution rate of 682 μmol g −1 h −1 and selectivity >99%. It provides a facile, efficient and adjustable route for photocatalytic CO 2 conversion with water. Here water nanodomains were applied to photocatalytic CO 2 reduction under ambient conditions, which shows a high CO production rate with selectivity >99%.