摘要
The CO_(2)photoconversion is sensitive to the local reaction environment,of which activity and selectivity can be regulated by the change of reaction systems.This paper focuses on investigating the photocatalytic CO_(2)reduction behaviors of MOFs with the involvement of water under different reaction modes,including gas-solid and liquid-solid systems.The CO_(2)photoreduction in a liquid-solid system shows high performance in generating HCOOH with the selectivity of 100%.In contrast,the gas-solid system referring to the synergistic interaction of MOFs and H_(2)O vapor benefits to the formation of gas-phase products,such as CO and CH_(4).The possible mechanisms of photocatalytic CO_(2)reaction in two modes were investigated by in-situ Fourier-transform infrared spectroscopy,which indicates that the distinction in reaction consequence may result from the difference in CO_(2)chemisorbed modes and the proton provision.The choice of reaction system plays an important role in the achievement of high efficiency and selectivity for photocatalytic CO,reduction,whichis of great practical value in real-world applications.
基金
the Fujian Science Technology Innovation Laboratory for Optoelectronic Information of China(Nos.2021ZR105,2021ZZ103)
the National Natural Science Foundation of China(Nos.22071246,22033008).
