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

Hellier, Pip, Wells, Peter P, Gianolio, Diego and Bowker, Michael ORCID: https://orcid.org/0000-0001-5075-1089 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:	06 May 2023 02:56
URI:	https://orca.cardiff.ac.uk/id/eprint/106302

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