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VOx/Fe2O3 shell–core catalysts for the selective oxidation of methanol to formaldehyde

VOx/Fe2O3 shell–core catalysts for the selective oxidation of methanol to formaldehyde
VOx/Fe2O3 shell–core catalysts for the selective oxidation of methanol to formaldehyde
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.
1022-5528
Hellier, Pip
c3bd090a-2f8d-45ec-8ee6-781c034eb9b9
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Gianolio, Diego
5b316f7d-f314-4337-954e-8c0ce8e38223
Bowker, Michael
c9ab10a5-d144-4533-bf6d-2fa16b669565
Hellier, Pip
c3bd090a-2f8d-45ec-8ee6-781c034eb9b9
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Gianolio, Diego
5b316f7d-f314-4337-954e-8c0ce8e38223
Bowker, Michael
c9ab10a5-d144-4533-bf6d-2fa16b669565

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. (doi:10.1007/s11244-017-0873-2).

Record type: Article

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.

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s11244-017-0873-2 - Version of Record
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e-pub ahead of print date: 3 November 2017

Identifiers

Local EPrints ID: 416678
URI: http://eprints.soton.ac.uk/id/eprint/416678
ISSN: 1022-5528
PURE UUID: b365afb5-729f-4dfc-8991-98a6335d899e
ORCID for Peter P. Wells: ORCID iD orcid.org/0000-0002-0859-9172

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Date deposited: 04 Jan 2018 17:30
Last modified: 16 Mar 2024 03:47

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Contributors

Author: Pip Hellier
Author: Peter P. Wells ORCID iD
Author: Diego Gianolio
Author: Michael Bowker

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