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VOx/Fe2O3 Shell-Core Catalysts for the selective oxidation of methanol to formaldehyde

Hellier, Pip, Wells, Peter P, Gianolio, Diego and Bowker, Michael 2017. VOx/Fe2O3 Shell-Core Catalysts for the selective oxidation of methanol to formaldehyde. Topics in Catalysis 10.1007/s11244-017-0873-2

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Abstract

Efficient oxidation catalysts are important in many current industrial processes, including the selective oxidation of methanol to formaldehyde. Vanadium-containing catalysts have been shown to be effective selective oxidation catalysts for certain reactions, and research continues to examine their applicability to other reactions of interest. Several VOx/Fe2O3 shell–core catalysts with varying VOx coverage have been produced to investigate the stability of VOx monolayers and their selectivity for methanol oxidation. Catalyst formation proceeds via a clear progression of distinct surface species produced during catalyst calcination. At 300 °C the selective VOx overlayer has formed; by 500 °C a sandwich layer of FeVO4 arises between the VOx shell and the Fe2O3 core, inhibiting iron cation participation in the catalysis and enhancing catalyst selectivity. The resulting catalysts, comprising a shell–subshell–core system of VOx/FeVO4/Fe2O3, possess good catalytic activity and selectivity to formaldehyde.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Publisher: Springer
ISSN: 1022-5528
Funders: EPSRC
Date of First Compliant Deposit: 7 November 2017
Date of Acceptance: 3 November 2017
Last Modified: 08 Nov 2017 15:08
URI: http://orca-mwe.cf.ac.uk/id/eprint/106302

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