Methane dissociative chemisorption on Pt(111) explored by microscopic reversibility

Angle-resolved thermal programmed reaction was used to investigate the hydrogenation of methyl radicals on Pt(111). The angular distribution of desorbing methane produced at 240 K was strongly peaked towards the surface normal and the reaction displayed little kinetic isotope effect. When microscopi...

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Bibliographic Details
Published inSurface science Vol. 286; no. 3; pp. L571 - L576
Main Authors Ukraintsev, V.A., Harrison, I.
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.05.1993
Amsterdam Elsevier Science
New York, NY
Subjects
Applied sciences
Chemistry
Exact sciences and technology
General and physical chemistry
Metals. Metallurgy
Solid-gas interface
Surface physical chemistry
Methane
Chemisorption
Surface reaction
Organic adsorbate
Chemical dissociation
Transition metal
Desorption
Crystal face
Experimental study
Hydrogenation
Gas solid adsorption
Platinum
Gas solid interface
Metallic adsorbent
Angular distribution
Mass spectrometry
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Summary:Angle-resolved thermal programmed reaction was used to investigate the hydrogenation of methyl radicals on Pt(111). The angular distribution of desorbing methane produced at 240 K was strongly peaked towards the surface normal and the reaction displayed little kinetic isotope effect. When microscopic reversibility arguments are applied, these observations suggest that dissociative chemisorption of CH 4 on an extensively H covered Pt(111) surface will display a sharply angle dependent sticking coefficient and little evidence for tunneling.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(93)90405-9