The roles of polyoxometalates in photocatalytic reduction of carbon dioxide

Metal–Organic Cages with {SiW9Ni4} Polyoxotungstate Nodes

“…In all cases, CO was the predominant product, whereas H 2 production was minimal in comparison. As shown in Figure 4a, the polyanion 2 showed the best photocatalytic activity among the five samples, with an initial CO evolution rate of 15.3 μmol h −1 and a selectivity of 96.2 % during a 0.5 h reaction period, making it one of the best POM catalysts for the photoreduction of CO 2 [19a] . However, contrary to our initial belief that the cavities of the cage complexes might be able to aid the catalytic processes, their photoreduction performance showed little association with the size of the voids, or if any, an inverse correlation between them.…”

“…A diverse group of POM-based materials, [19] including Ni-POMs, [19m,n] have exhibited promising activities towards photocatalytic production of CO/H 2 . To this end, we evaluated the solution stability of the above MOP cages.…”

“…[17] For instance, polyoxotungstatebased catalysts have played a prominent role in the photoreduction of CO 2 . [19] MOP cages incorporating polyoxotungstate building blocks, therefore, could open up opportunities for novel functions and applications in catalysis, sensing, and beyond. Here we reported a family of self-assembled molecular cages, consisting of a Ni II 4 -substituted silicotungstate as the SBU and rigid dicarboxylates as linkers, and their photocatalytic activity in CO 2 reduction reaction.…”

Metal–Organic Cages with {SiW9Ni4} Polyoxotungstate Nodes

“…Chemie evolution. A diverse group of POM-based materials, [19] including Ni-POMs, [19m,n] have exhibited promising activities towards photocatalytic production of CO/H 2 . To this end, we evaluated the solution stability of the above MOP cages.…”

Nanostructure@metal-organic frameworks (MOFs) for catalytic carbon dioxide (CO2) conversion in photocatalysis, electrocatalysis, and thermal catalysis

“…Polyoxometalates (POMs) own metal oxide polyhedra (MO x , x=5, 6) as basic structural unit consisted of transition metal cations and polyoxometalate polyanions, in which transition metal M normally has a high valence, such as W VI , Mo VI , V V , Ta V , and Nb V . POMs as a class of typical cluster compound were widely investigated for catalytic applications [67][68][69]. Taking advantages of the superior traits of POMs including the redox capability, welldefined active sites, tunable light absorption, reversible electrons acceptance and donation, the POMs can be used as photocatalysts, cocatalysts, photosensitizers, and multi-electron mediator in the application of CO 2 photoreduction [16,[70][71][72][73][74][75].…”