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Methanol oxidation over shell-core MOx/Fe2O3 (M = Mo, V, Nb) catalysts

Hellier, Pip, Wells, Peter P and Bowker, Michael 2019. Methanol oxidation over shell-core MOx/Fe2O3 (M = Mo, V, Nb) catalysts. Chinese Journal of Catalysis 40 (11) , pp. 1686-1692. 10.1016/S1872-2067(19)63350-4
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Abstract

We present a comparison of Mo, V and Nb oxides as shell materials atop haematite cores used for selective methanol oxidation. While Mo and V both yield high selectivity to formaldehyde, Nb does not. Very different reactivity patterns are seen for Nb, which mainly shows dehydrogenation (to CO) and dehydration (to DME), indicating the lack of a complete shell, while Raman spectroscopy shows that the Mo and V formation process is not followed by NbOx. We suggest this is due to the large differences in mobility within the solid materials during formation, NbOx requiring significantly higher (and deleterious) calcination temperatures to allow sufficient mobility for shell completion.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Elsevier
ISSN: 1872-2067
Date of First Compliant Deposit: 15 May 2019
Date of Acceptance: 5 March 2019
Last Modified: 11 Nov 2019 10:35
URI: http://orca-mwe.cf.ac.uk/id/eprint/122575

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