Hydrogen radical detection in mild catalytic reactions: Background C‐H activation in solvents

Rogers, Hannah, Woodman, Timothy J., Willock, David ORCID: https://orcid.org/0000-0002-8893-1090, Folli, Andrea ORCID: https://orcid.org/0000-0001-8913-6606 and Freakley, Simon 2025. Hydrogen radical detection in mild catalytic reactions: Background C‐H activation in solvents. ChemCatChem 10.1002/cctc.202401969

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Abstract

Platinum group metal (PGM) nanoparticle catalysts are commonly used in a wide variety of liquid‐phase hydrogenation reactions. Carbon‐supported palladium nanoparticles are used extensively in many industrially applied hydrogenation reactions across the pharmaceutical industry and increasingly in the hydrogenolysis of bio‐derived molecules. These reactions are often performed in solvents such as toluene or xylene which are considered inert towards mild hydrogenation conditions. Through a series of catalytic studies analysed using 1H/2H Nuclear Magnetic Resonance (NMR) and Electron Paramagnetic Resonance (EPR) spectroscopies, and Density Functional Theory (DFT) calculations, we present evidence that hydrogen is being constantly exchanged into the solvent possibly via a radical mechanism at these mild conditions and suggest that these effects should be considered in the explanation of any model of catalytic hydrogenation reaction at metal surfaces.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Research Institutes & Centres > Cardiff Catalysis Institute (CCI) Schools > Chemistry
Publisher:	Wiley
ISSN:	1867-3880
Date of First Compliant Deposit:	7 March 2025
Date of Acceptance:	14 February 2025
Last Modified:	20 Mar 2025 09:34
URI:	https://orca.cardiff.ac.uk/id/eprint/176698

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