Large-scale synthesis of low-cost 2D metal-organic frameworks for highly selective photocatalytic CO2 reduction
Ning‐Yu Huang, Zhenyu Chen, Fei-Long Hu, Chunyan Shang, Wenjuan Wang, Jia‐Run Huang, Chuan Zhou, Lei Li, Qiang Xü
Abstract
Two-dimensional metal-organic frameworks (2D MOFs), as a new type of 2D materials, have been widely applied in various applications because of their unique structures and exposed active sites. Herein, we reported two low-cost 2D MOFs constructed by a raw chemical succinic acid (SA), M-SA (M = Ni or Co), which served as efficient photocatalysts for the reduction of CO 2 to CO. Taking advantage of the thinness and open metal sites, the ultrathin Ni-SA nanosheets (ca. 3.6 nm) exhibited excellent CO production of 6.96(7) mmol·g −1 h −1 and CO selectivity of 96.6%. Photoelectrochemical tests and theoretical calculations further confirmed the higher charge transfer efficiency and unsaturated metal sites for promoting photocatalytic performances. More importantly, Ni-SA can also be synthesized in large-scale by an energy-saving method under room temperature, strongly suggesting its promising future and potential for practical applications.