Study of H2, O2, CO Adsorption and CO+O2 Reaction on Pt(100), Pd(110) Monocrystal Surfaces Full article
Conference |
Physical Methods for Catalytic Research at the Molecular Level: International memorial K.I. Zamaraev conference 28 Jun - 2 Jul 1999 , Novosibirsk |
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Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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Output data | Year: 2000, Volume: 158, Number: 1, Pages: 155-160 Pages count : 6 DOI: 10.1016/S1381-1169(00)00060-1 | ||||||
Tags | CO oxidation, Platinum metals, Subsurface hydrides | ||||||
Authors |
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Affiliations |
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Funding (2)
1 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 1882 |
2 | Russian Foundation for Basic Research | 99-03-32433 |
Abstract:
Nanoscale changes in the surface morphology of Pd particles that accompany the uptake of hydrogen have been studied in situ by Field Electron Microscopy (FEM). Exposure of a Pd tip to H2 at low temperatures led to the formation of extruding PdHx particles on top of the Pd tip. Growth of these particles proceeds in a “staccato” manner. When most of the hydrogen have been removed from the sample by heating in vacuum, Pd crystallites remain on the surface. They are quite stable up to about 700 K, where they melt back into the bulk of the tip. A sharp low temperature H2-peak (220 K) appears in the TD spectra as a result of decomposition of PdHx hydrides on Pd(110) single crystal surface. During the O2+Hads reaction, a hydrogen-modified Pt(100)-(hex) surface shows an increase in the population of atomic oxygen states: three Oads states are observed by high resolution electron energy loss spectroscopy (HREELS) as a result of the presence of defect sites. The reactivity of these new oxygen states to CO has been investigated with thermal desorption spectroscopy (TDS).
Cite:
Gorodetskii V.V.
, Matveev A.V.
, Cobden P.
, Nieuwenhuys B.
Study of H2, O2, CO Adsorption and CO+O2 Reaction on Pt(100), Pd(110) Monocrystal Surfaces
Journal of Molecular Catalysis A: Chemical. 2000. V.158. N1. P.155-160. DOI: 10.1016/S1381-1169(00)00060-1 WOS Scopus РИНЦ
Study of H2, O2, CO Adsorption and CO+O2 Reaction on Pt(100), Pd(110) Monocrystal Surfaces
Journal of Molecular Catalysis A: Chemical. 2000. V.158. N1. P.155-160. DOI: 10.1016/S1381-1169(00)00060-1 WOS Scopus РИНЦ
Dates:
Published online: | Jul 18, 2000 |
Published print: | Sep 8, 2000 |
Identifiers:
Web of science | WOS:000089201200016 |
Scopus | 2-s2.0-0000729771 |
Elibrary | 13346590 |
Chemical Abstracts | 2000:498677 |
Chemical Abstracts (print) | 133:199274 |
OpenAlex | W2014284174 |