Ensemble effects on methanol oxidation to formaldehyde on ferric molybdate catalysts

Bowker, Michael ORCID: https://orcid.org/0000-0001-5075-1089, House, Matthew, Brookes, Catherine, Hellier, Pip and Wells, Peter 2024. Ensemble effects on methanol oxidation to formaldehyde on ferric molybdate catalysts. ChemCatChem 16 (6) , e202301464. 10.1002/cctc.202301464

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Abstract

The properties of Mo-doped iron oxide are compared with those of the single oxides of Fe and Mo, and with stoichiometric ferric molybdate for the selective oxidation of methanol. It is found that Mo oxide segregates to the surface of the iron oxide at low loadings, while at higher loadings, but below the stoichiometric ratio, presents layers of ferric molybdate at the surface. The relationship between bulk loading and surface Mo is explored, and it is concluded that the reactivity is dominated by ensemble effects. Simple modelling indicates that four or more Fe cation ensembles are required to combust methanol to CO2, ensembles of two Mo cations are required for selective oxidation to formaldehyde, whereas it seems that isolated single sites of either Fe or Mo produce CO.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Wiley
ISSN:	1867-3880
Funders:	EPSRC, UK Catalysis Hub
Date of First Compliant Deposit:	21 February 2024
Date of Acceptance:	22 January 2024
Last Modified:	16 Apr 2024 15:31
URI:	https://orca.cardiff.ac.uk/id/eprint/166433

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