Hydrophobic Polyoxometalate-Based Metal-Organic Framework for Efficient CO2 Photoconversion.

A novel polyoxometalate (POM)-based metal-organic framework, TBA5[P2Mo16VMo8VIO71(OH)9Zn8(L)4] (NNU-29), was in situ synthesized and applied into CO2 photoreduction. The selection of porous material containing a reductive POM cluster is considered to be helpful for CO2 reduction; meanwhile, a hydrophobic-group-modified organic ligand enables NNU-29 to exhibit good chemical stability and restrains hydrogen generation to some extent. In the photocatalytic CO2 reduction, the yield of HCOO- reached 35.2 µmol in the aqueous solution with selectivity of 97.9% after 16 h.