Issue 22, 2023

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

Abstract

The CO2 emissions from flue gases in traditional electricity generation and industrial sectors account for the main source of global emissions. The direct conversion of CO2 in flue gases into value-added carbon production is a low-cost and simple process to realize a carbon neutral cycle, yet the development of an efficient catalyst to treat the CO2 in flue gases is still in its infancy. Here, we present two polyoxometalate-based metal organic frameworks (POMOFs) with [W10O32]4− as the connecting node, named Co2(W10O32)(BIA)4(CH3CN)4 (compound 1) and Co4(W10O32)(INA)6(CH3CN)4(TBA)2 (compound 2), as catalysts for the photoreduction of CO2 in exhaust gases. Under a pure CO2 atmosphere, syngas is the main product and the yield of compound 1 is 72.7 μmol h−1, which is ∼40% higher than that of compound 2 (54.2 μmol h−1). Notably, the yield of compound 1 reaches 42.7 μmol h−1 with 15% CO2 in the flue gas, which indicates that the catalyst can not only overcome the low CO2 concentration but also tolerate the harsh gas composition in the flue gas. In addition, density functional theory (DFT) calculations show that the charge distribution and steric hindrance of compound 1 were conducive to the reduction reaction.

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

Supplementary files

Article information

Article type
Paper
Submitted
03 Mär 2023
Accepted
10 Mai 2023
First published
10 Mai 2023

J. Mater. Chem. C, 2023,11, 7389-7396

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

S. You, Y. Dong, B. Hou, M. Dong, J. Tong, L. Wang, X. Wang, C. Sun, W. Guan and Z. Su, J. Mater. Chem. C, 2023, 11, 7389 DOI: 10.1039/D3TC00775H

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