Monometallic Catalytic Models Hosted in Stable Metal-Organic Frameworks for Tunable CO2 Photoreduction
Wang, XK (Wang, Xiao-Kun)[ 1 ] ; Liu, J (Liu, Jiang)[ 2 ] ; Zhang, L (Zhang, Lei)[ 2 ] ; Dong, LZ (Dong, Long-Zhang)[ 2 ] ; Li, SL (Li, Shun-Li)[ 2 ] ; Kan, YH (Kan, Yu-He)[ 3 ] ; Li, DS (Li, Dong-Sheng)[ 1 ]*; Lan, YQ (Lan, Ya-Qian)[ 2 ]*（兰亚乾）
[ 1 ] China Three Gorges Univ, Coll Mat & Chem Engn, Key Lab Inorgan Nonmetall Crystalline & Energy Co, 8 Daxue Rd, Yichang 443002, Peoples R China
[ 2 ] Nanjing Normal Univ, Jiangsu Key Lab Biofunct Mat, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China
[ 3 ] Huaiyin Normal Univ, Sch Chem & Chem Engn, Jiangsu Prov Key Lab Chem Low Dimens Mat, Huaian 223300, Peoples R China
The photocatalytic reduction of CO2 to energy carriers has emerged as one of the most promising strategies to alleviate the energy crisis and CO2 pollution, for which the development of catalyst was considered as the determining factor for the accomplishment of this conversion process. In this study, three stable and isostructural metal-organic frameworks (denoted as MOF-Ni, MOF-Co, and MOF-Cu) have been synthesized and used as heterogeneous catalysts in photocatalytic CO2 reduction reaction (CO2RR). It is worth noting that the MOF-Ni exhibited very high selectivity of 97.7% for photoreducing CO2 to CO, which has exceeded most of the reported MOF-based catalysts in the field. Significantly, the MOFs associated with a monometallic catalytic center offer a simple and precise structural model which allows us to understand more definitively the specific effects of different metal-ion species on photoreduction of CO2 as well as the reactive mechanism.