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Solvent-Free Photoreduction of CO2 to CO Catalyzed by Fe-MOFs with Superior Selectivity
journal contribution
posted on 2019-06-11, 15:44 authored by Xiao-Yao Dao, Jin-Han Guo, Yuan-Ping Wei, Fan Guo, Yi Liu, Wei-Yin SunIt
is deemed as a desired approach to utilize solar energy for the conversion
of CO2 into valuable products, and the majority of the
MOFs-based photocatalytic reductions of CO2 have focused
on formic acid (HCOOH) production with an organic solvent as the reaction
medium. Herein, we report a solvent-free reaction route for the photoreduction
of CO2 catalyzed by Fe-MOFs, namely, NH2-MIL-53(Fe)
[(Fe(OH)(NH2–BDC)]•G, NH2-MIL-88B(Fe)
[Fe3O(H2O)3(NH2–BDC)3]Cl•G, and NH2-MIL-101(Fe) [Fe3O(H2O)3(NH2–BDC)3]Cl•G (NH2–BDC = 2-aminoterephthalic acid;
G = guest and/or solvent molecules). Compared with the orthodox reaction
route, the present out-of-the-way photocatalytic reduction of CO2 with superior selectivity to CO occurs at the gas–solid
interface. The reaction procedure is environmentally friendly and
provides a possibility to address the CO2 emission problem.
Importantly, NH2-MIL-101(Fe) shows the highest photocatalytic
activity among these Fe-MOFs due to its efficient charge separation
and electron transfer.