Understanding the role of promoters in catalysis: operando XAFS/DRIFTS study of CeOx/Pt/Al2O3 during CO oxidation

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) pp. 5–12.

DOI: https://doi.org/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.

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About

  • Item ORO ID
  • 49398
  • Item Type
  • Journal Item
  • ISSN
  • 2055-0758
  • Project Funding Details
  • Funded Project NameProject IDFunding Body
    Not SetEP/ K014706/1EPSRC (Engineering and Physical Sciences Research Council)
    Not SetEP/K014668/1EPSRC (Engineering and Physical Sciences Research Council)
    Not SetEP/K014854/1EPSRC (Engineering and Physical Sciences Research Council)
    Not SetEP/K014714/1EPSRC (Engineering and Physical Sciences Research Council)
    Not SetEP/I019693/1EPSRC (Engineering and Physical Sciences Research Council)
    Not SetEP/K005030/1EPSRC (Engineering and Physical Sciences Research Council)
  • Keywords
  • Operando; XAFs; DriFts; CO oxidation; Pt/Al2O3; catalysis; ceria
  • Academic Unit or School
  • Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
    Faculty of Science, Technology, Engineering and Mathematics (STEM)
  • Copyright Holders
  • © 2017 The Author(s)
  • Depositing User
  • Eleanor Crabb

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