Engineered assembly of water-dispersible nanocatalysts enables low-cost and green CO2 capture

Masood S. Alivand, Omid Mazaheri, Yue Wu, Ali Zavabeti, Andrew J. Christofferson, Nastaran Meftahi, Salvy P. Russo, Geoffrey W. Stevens, Colin A. Scholes and Kathryn A. Mumford ()
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Masood S. Alivand: The University of Melbourne
Omid Mazaheri: The University of Melbourne
Yue Wu: The University of Melbourne
Ali Zavabeti: The University of Melbourne
Andrew J. Christofferson: RMIT University
Nastaran Meftahi: RMIT University
Salvy P. Russo: RMIT University
Geoffrey W. Stevens: The University of Melbourne
Colin A. Scholes: The University of Melbourne
Kathryn A. Mumford: The University of Melbourne

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Catalytic solvent regeneration has attracted broad interest owing to its potential to reduce energy consumption in CO2 separation, enabling industry to achieve emission reduction targets of the Paris Climate Accord. Despite recent advances, the development of engineered acidic nanocatalysts with unique characteristics remains a challenge. Herein, we establish a strategy to tailor the physicochemical properties of metal-organic frameworks (MOFs) for the synthesis of water-dispersible core-shell nanocatalysts with ease of use. We demonstrate that functionalized nanoclusters (Fe3O4-COOH) effectively induce missing-linker deficiencies and fabricate mesoporosity during the self-assembly of MOFs. Superacid sites are created by introducing chelating sulfates on the uncoordinated metal clusters, providing high proton donation capability. The obtained nanomaterials drastically reduce the energy consumption of CO2 capture by 44.7% using only 0.1 wt.% nanocatalyst, which is a ∽10-fold improvement in efficiency compared to heterogeneous catalysts. This research represents a new avenue for the next generation of advanced nanomaterials in catalytic solvent regeneration.

Date: 2022
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DOI: 10.1038/s41467-022-28869-6

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