N-heterocyclic carbene modified palladium catalysts for the direct synthesis of hydrogen peroxide

Lewis, Richard J., Koy, Maximilian, Macino, Margherita, Das, Mowpriya, Carter, James H., Morgan, David J. ORCID: https://orcid.org/0000-0002-6571-5731, Davies, Thomas E., Ernst, Johannes B., Freakley, Simon J., Glorius, Frank and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 2022. N-heterocyclic carbene modified palladium catalysts for the direct synthesis of hydrogen peroxide. Journal of the American Chemical Society 144 (34) , pp. 15431-15436. 10.1021/jacs.2c04828

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Abstract

Heterogeneous palladium catalysts modified by N-heterocyclic carbenes (NHCs) are shown to be highly effective toward the direct synthesis of hydrogen peroxide (H2O2), in the absence of the promoters which are typically required to enhance both activity and selectivity. Catalytic evaluation in a batch regime demonstrated that through careful selection of the N-substituent of the NHC it is possible to greatly enhance catalytic performance when compared to the unmodified analogue and reach concentrations of H2O2 rivaling that obtained by state-of-the-art catalysts. The enhanced performance of the modified catalyst, which is retained upon reuse, is attributed to the ability of the NHC to electronically modify Pd speciation.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	American Chemical Society
ISSN:	0002-7863
Date of First Compliant Deposit:	30 August 2022
Date of Acceptance:	3 August 2022
Last Modified:	30 Oct 2023 07:15
URI:	https://orca.cardiff.ac.uk/id/eprint/152228

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