N-Heterocyclic Carbene Modified Palladium Catalysts for the Direct Synthesis of Hydrogen Peroxide

Overview

Journal J Am Chem Soc

Publisher American Chemical Society

Specialty Chemistry

Date 2022 Aug 17

PMID 35976628

Authors

Richard J Lewis

Maximilian Koy

Margherita Macino

Mowpriya Das

James H Carter

David J Morgan

Thomas E Davies

Johannes B Ernst

Simon J Freakley

Frank Glorius

Graham J Hutchings

Affiliations

Soon will be listed here.

Abstract

Heterogeneous palladium catalysts modified by N-heterocyclic carbenes (NHCs) are shown to be highly effective toward the direct synthesis of hydrogen peroxide (HO), 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 HO 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.

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