Issue 24, 2022

Cyclohexanone ammoximation via in situ H2O2 production using TS-1 supported catalysts

Abstract

The ammoximation of cyclohexanone to the corresponding oxime via in situ H2O2 formation offers an attractive alternative to the current industrial means of production, overcoming the significant economic and environmental concerns associated with the manufacture of a key reagent, H2O2. Herein we demonstrate the efficacy of a composite catalyst, consisting of precious metal nanoparticles supported on a commercial TS-1, towards the in situ synthesis of cyclohexanone oxime, bridging the wide condition gap that exists between the two distinct reaction pathways: H2O2 direct synthesis and cyclohexanone ammoximation. In particular, the alloying of Au with Pd and the introduction of low concentrations of Pt into AuPd nanoalloys are found to be key in promoting high catalytic performance. The improved catalytic activity of optimal catalysts is found to result from a combination of a disruption of contiguous Pd ensembles and the modification of Pd oxidation states, which in turn dictate catalytic activity towards the production and subsequent degradation of H2O2.

Graphical abstract: Cyclohexanone ammoximation via in situ H2O2 production using TS-1 supported catalysts

Supplementary files

Article information

Article type
Paper
Submitted
19 júl. 2022
Accepted
08 sep. 2022
First published
09 sep. 2022
This article is Open Access
Creative Commons BY license

Green Chem., 2022,24, 9496-9507

Cyclohexanone ammoximation via in situ H2O2 production using TS-1 supported catalysts

R. J. Lewis, K. Ueura, Y. Fukuta, T. E. Davies, D. J. Morgan, C. B. Paris, J. Singleton, Jennifer. K. Edwards, S. J. Freakley, Y. Yamamoto and G. J. Hutchings, Green Chem., 2022, 24, 9496 DOI: 10.1039/D2GC02689A

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