CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures

Y. Martynova; B. H. Liu; M. E. McBriarty; I. M.N. Groot; M. J. Bedzyk; S. Shaikhutdinov; H. J. Freund

doi:10.1016/j.jcat.2013.02.018

CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures

Y. Martynova, B. H. Liu, M. E. McBriarty, I. M.N. Groot, M. J. Bedzyk, S. Shaikhutdinov^*, H. J. Freund

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

Well-ordered ultrathin ZnO(0 0 0 1) films were grown on Pt(1 1 1) in a layer-by-layer mode. The reactivity of the films as a function of the film thickness and coverage was examined by the CO oxidation reaction at near-atmospheric pressures. At low temperatures (∼450 K), CO₂ production is found to be much higher on the films of partial coverage than on dense ZnO(0 0 0 1) films and bare Pt(1 1 1). Under reaction conditions, monolayer islands and an entire monolayer film transform into two-monolayers-thick islands, which dominate the surface of the active catalysts. The results provide an adequate structural model for elucidating the reaction mechanism on the oxide/metal boundary at technologically relevant conditions.

Original language	English (US)
Pages (from-to)	227-232
Number of pages	6
Journal	Journal of Catalysis
Volume	301
DOIs	https://doi.org/10.1016/j.jcat.2013.02.018
State	Published - May 2013

Keywords

CO oxidation
Thin oxide films
Zinc oxide

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

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10.1016/j.jcat.2013.02.018

Cite this

@article{6891148b1076444382ed8c96564763cd,

title = "CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures",

abstract = "Well-ordered ultrathin ZnO(0 0 0 1) films were grown on Pt(1 1 1) in a layer-by-layer mode. The reactivity of the films as a function of the film thickness and coverage was examined by the CO oxidation reaction at near-atmospheric pressures. At low temperatures (∼450 K), CO2 production is found to be much higher on the films of partial coverage than on dense ZnO(0 0 0 1) films and bare Pt(1 1 1). Under reaction conditions, monolayer islands and an entire monolayer film transform into two-monolayers-thick islands, which dominate the surface of the active catalysts. The results provide an adequate structural model for elucidating the reaction mechanism on the oxide/metal boundary at technologically relevant conditions.",

keywords = "CO oxidation, Thin oxide films, Zinc oxide",

author = "Y. Martynova and Liu, {B. H.} and McBriarty, {M. E.} and Groot, {I. M.N.} and Bedzyk, {M. J.} and S. Shaikhutdinov and Freund, {H. J.}",

year = "2013",

month = may,

doi = "10.1016/j.jcat.2013.02.018",

language = "English (US)",

volume = "301",

pages = "227--232",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

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TY - JOUR

T1 - CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures

AU - Martynova, Y.

AU - Liu, B. H.

AU - McBriarty, M. E.

AU - Groot, I. M.N.

AU - Bedzyk, M. J.

AU - Shaikhutdinov, S.

AU - Freund, H. J.

PY - 2013/5

Y1 - 2013/5

N2 - Well-ordered ultrathin ZnO(0 0 0 1) films were grown on Pt(1 1 1) in a layer-by-layer mode. The reactivity of the films as a function of the film thickness and coverage was examined by the CO oxidation reaction at near-atmospheric pressures. At low temperatures (∼450 K), CO2 production is found to be much higher on the films of partial coverage than on dense ZnO(0 0 0 1) films and bare Pt(1 1 1). Under reaction conditions, monolayer islands and an entire monolayer film transform into two-monolayers-thick islands, which dominate the surface of the active catalysts. The results provide an adequate structural model for elucidating the reaction mechanism on the oxide/metal boundary at technologically relevant conditions.

AB - Well-ordered ultrathin ZnO(0 0 0 1) films were grown on Pt(1 1 1) in a layer-by-layer mode. The reactivity of the films as a function of the film thickness and coverage was examined by the CO oxidation reaction at near-atmospheric pressures. At low temperatures (∼450 K), CO2 production is found to be much higher on the films of partial coverage than on dense ZnO(0 0 0 1) films and bare Pt(1 1 1). Under reaction conditions, monolayer islands and an entire monolayer film transform into two-monolayers-thick islands, which dominate the surface of the active catalysts. The results provide an adequate structural model for elucidating the reaction mechanism on the oxide/metal boundary at technologically relevant conditions.

KW - CO oxidation

KW - Thin oxide films

KW - Zinc oxide

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DO - 10.1016/j.jcat.2013.02.018

M3 - Article

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SN - 0021-9517

VL - 301

SP - 227

EP - 232

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures

Abstract

Keywords

ASJC Scopus subject areas

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