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.
Hellier, Pip
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Wells, Peter P.
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Gianolio, Diego
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Bowker, Michael
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Hellier, Pip
c3bd090a-2f8d-45ec-8ee6-781c034eb9b9
Wells, Peter P.
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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).
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
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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
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Date deposited: 04 Jan 2018 17:30
Last modified: 16 Mar 2024 03:47
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Author:
Pip Hellier
Author:
Diego Gianolio
Author:
Michael Bowker
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