[W₁₀O₃₂]⁴⁻-based POMOFs with different nuclear cobalt clusters for photoreduction of CO₂ to produce syngas

Abstract

CO2 emissions from flue gases in the traditional electricity generation and industrial sectors account for the main source of global emissions. Direct convention of CO2 in flue gases into value-added...

Polyoxometalate‐Based Frameworks: Construction Strategies and Photocatalytic Applications

“…Recently, You et al has reported two POM-based metal organic frameworks, constructed by Co 2 + ions and organic ligands as bridging ligands with [W 10 O 32 ] 4À as connecting node, named Co 2 (W 10 O 32 )(BIA) 4 -(CH 3 CN) 4 (Co2-W10, BIA = 1H-benzimidazole-5-carboxylic acid) and Co 4 (W 10 O 32 )(INA) 6 (CH 3 CN) 4 (TBA) 2 (Co4-W10, isonicotinic acid). [65] Photocatalytic experiments towards CO 2 RR were performed by using [Ru(bpy) 3 ]Cl 2 complex as PS and also TEOA as sacrificial electron donor in a mixed solution of water/CH 3 CN/TEOA (v/v/v = 1 : 4 : 1), and syngas was detected as the main product with the yield of 72.7 μmol h À 1 for Co2-W10 and 54.2 μmol h À 1 for Co4-W10. This photocatalysis could also occur at a low CO 2 concentration that the yield of syngas in 30 % CO 2 could reach 53.3 μmol h À 1 in the presence of Co2-W10 as photocatalyst, only 25 % reduction compared to the pure CO 2 yield.…”

Dynamic covalent bonding for directed construction of molecular cages toward carbon dioxide reduction

“…In recent years, molecular cages have shown fascinating properties and unlimited potential in catalysis because of their unique high dispersibility in solution. 6–14 This inherent property causes them to hold the merits of both homogeneous catalysts with easy access to active sites and heterogeneous materials with recyclable properties. 15–17 However, the limited stability of MOCs resulting from the relatively weak coordination bonds hinders their development in practical applications.…”

A reduced polyoxometalate-encapsulated organo cobalt modified phosphate framework for improving photocatalytic reduction of CO2

“…Metal–organic frameworks (MOFs), which may be employed as functional platforms to unhomogenise POMs, are compounds with the ability to expand through repeating coordination of organic ligands and metal ions. 22–27 One promising solution is to synthesize POM-based MOF (POMOF) materials by combining POMs as the guest and a porous MOF as the host matrix, which can be used to overcome pure POMs’ solubility. 28,29 Generally speaking, a POMOF provides the following advantages: (i) it benefits from strong thermal stability and recyclability; (ii) the crystal form of a POMOF with a defined structure and chemical composition is advantageous for researching catalytic procedures; (iii) MOFs are splendid platforms for the catalytic realization of hierarchical solar energy conversion centers, which is because of their enormous surface area, abundant metal content, and active flexibility in the design of a web framework.…”