Furfural Adsorption and Hydrogenation at the Oxide-Metal Interface: Evidence of the Support Influence on the Selectivity of Iridium-Based Catalysts

Abstract

Here, tetrakis(hydroxymethyl)phosphonium chloride-protected colloidal iridium nanoparticles were deposited by sol-immobilisation on three different supports (CeO2, NiO and TiO2) and were investigated for the liquid-phase direct hydrogenation (H2 atmosphere) and catalytic transfer hydrogenation – CTH (N2 atmosphere) of furfural to study the effect of the H donor. The occurrence of strong-metal support interactions in 1 wt % Ir/CeO2 catalyst, as disclosed by XPS, was revealed to be responsible for the high activity observed in the direct hydrogenation (81 % conversion after 6 h) and for the unusual selectivity to 2-methylfuran (70 %) under CTH conditions. On the other hand, Ir/NiO showed peculiar selectivity to tetrahydrofurfuryl alcohol in both H2 and N2 atmospheres (71 % and 70 %, respectively). The density functional theory calculations further showed that the unique selectivity of Ir/NiO may be ascribed to the adsorption properties of furfural on the support, which activates a dual-site hydrogenation mechanism.

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Item Type:	Article
Authors/Creators:	Campisi, S Motta, D Barlocco, I Stones, R Chamberlain, TW https://orcid.org/0000-0001-8100-6452 Chutia, A Dimitratos, N Villa, A
Copyright, Publisher and Additional Information:	© 2022 Wiley-VCH GmbH. This is the peer reviewed version of the following article: S. Campisi, D. Motta, I. Barlocco, R. Stones, T. W. Chamberlain, A. Chutia, N. Dimitratos, A. Villa, ChemCatChem 2022, e202101700, which has been published in final form at https://doi.org/10.1002/cctc.202101700. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Keywords:	biomass, heterogenous catalysis, metal-support interactions, spillover, supported catalysts
Dates:	Published: 22 March 2022 Published (online): 27 January 2022 Accepted: 4 January 2022
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	19 Jan 2022 16:01
Last Modified:	27 Jan 2023 01:13
Status:	Published
Publisher:	Wiley
Identification Number:	10.1002/cctc.202101700
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:182090

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Furfural Adsorption and Hydrogenation at the Oxide-Metal Interface: Evidence of the Support Influence on the Selectivity of Iridium-Based Catalysts

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