Understanding the role of promoters in catalysis: operando XAFS/DRIFTS study of CeOx/Pt/Al2O3 during CO oxidation
Understanding the role of promoters in catalysis: operando XAFS/DRIFTS study of CeOx/Pt/Al2O3 during CO oxidation
A combined operando XAFS/DRIFTS study on CeOx/Pt/Al2O3 catalysts has been performed during CO oxidation and provides insights into the changes in nanoparticle structure and adsorbed species during the reaction profile. The onset of CO2 formation is shown to be concurrent with a rapid re-oxidation of the Pt nanoparticles, evidenced by XAFS spectroscopy, and the loss of bridge bonded CO adsorbed on Pt, as shown by simultaneous DRIFTS acquisition. The continued appearance of linear bound CO on the catalyst surface is shown to remain long after catalytic light off. The interaction of Pt and CeOx is evidenced by the improved performance towards CO oxidation, compared to the non-CeOx modified Pt/Al2O3, and changes in the CO adsorption properties on Pt previously linked to Pt-CeO2 interfaces.
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Gibson, E.K.
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Crabb, E.M.
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Gianolio, D.
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Russell, A.E.
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Thompsett, D.
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Wells, P.P.
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Gibson, E.K.
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Crabb, E.M.
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Gianolio, D.
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Russell, A.E.
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Thompsett, D.
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Wells, P.P.
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Gibson, E.K., Crabb, E.M., Gianolio, D., Russell, A.E., Thompsett, D. and Wells, P.P.
(2017)
Understanding the role of promoters in catalysis: operando XAFS/DRIFTS study of CeOx/Pt/Al2O3 during CO oxidation.
Catalysis Structure & Reactivity, 3 (1-2), .
(doi:10.1080/2055074X.2017.1278890).
Abstract
A combined operando XAFS/DRIFTS study on CeOx/Pt/Al2O3 catalysts has been performed during CO oxidation and provides insights into the changes in nanoparticle structure and adsorbed species during the reaction profile. The onset of CO2 formation is shown to be concurrent with a rapid re-oxidation of the Pt nanoparticles, evidenced by XAFS spectroscopy, and the loss of bridge bonded CO adsorbed on Pt, as shown by simultaneous DRIFTS acquisition. The continued appearance of linear bound CO on the catalyst surface is shown to remain long after catalytic light off. The interaction of Pt and CeOx is evidenced by the improved performance towards CO oxidation, compared to the non-CeOx modified Pt/Al2O3, and changes in the CO adsorption properties on Pt previously linked to Pt-CeO2 interfaces.
Text
Understanding the role of promoters in catalysis operando XAFS DRIFTS study of CeOx Pt Al2O3 during CO oxidation
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Accepted/In Press date: 30 November 2016
e-pub ahead of print date: 14 February 2017
Organisations:
Electrochemistry, FIMS
Identifiers
Local EPrints ID: 407631
URI: http://eprints.soton.ac.uk/id/eprint/407631
ISSN: 2055-0758
PURE UUID: d922e49d-94ec-4085-a46a-faf2c97ac500
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Date deposited: 16 Apr 2017 17:06
Last modified: 16 Mar 2024 03:47
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Contributors
Author:
E.K. Gibson
Author:
E.M. Crabb
Author:
D. Gianolio
Author:
D. Thompsett
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