Journal ArticleDOI
Reaction of deuterium atoms with cyclohexane on copper (111): hydrogen abstraction reactions by Eley-Rideal mechanisms
Ming Xi,Brian E. Bent +1 more
TLDR
In this paper, deuterium atoms formed on a hot tungsten filament are impinged onto a Cu(111) surface precovered with cyclohexane, and dehydrogenated products are evolved when the surface is heated in subsequent temperature-programmed reaction (TPR) experiment.Abstract:
Cyclohexane desorbs molecularly intact from Cu(111) and does not react with deuterium atoms that are preadsorbed on the surface By contrast, when deuterium atoms formed on a hot tungsten filament are impinged onto a Cu(111) surface precovered with cyclohexane, dehydrogenated products (cyclohexene, cyclohexadiene, and benzene) are evolved when the surface is heated in a subsequent temperature-programmed reaction (TPR) experiment These D-atom-induced dehydrogenation products provide strong evidence for an Eley-Rideal mechanism where D atoms abstract hydrogen from cyclohexane prior to thermal accommodation with the surface The kinetics of cyclohexene evolution indicate that both single and sequential H-atom abstractions occur by this mechanismread more
Citations
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Journal ArticleDOI
Mimicking Aspects of Heterogeneous Catalysis: Generating, Isolating, and Reacting Proposed Surface Intermediates on Single Crystals in Vacuum.
Journal ArticleDOI
Chemical Dynamics at the Gas−Surface Interface
TL;DR: A review of recent progress in the understanding of the chemical dynamics of gas−surface reactions can be found in this article, where the authors consider a number of important elementary processes, dealing in turn with translational, rotational, and vibrational energy exchange.
Journal ArticleDOI
The hydrogen surface chemistry of carbon as a plasma facing material
TL;DR: In this article, a review of the H carbon surface chemistry under the aspects of chemical erosion and H retention is presented in detail model studies directed towards identifying elementary reaction steps, e.g., the H C surface chemistry as relevant for the production of hard a-C:H coatings and low pressure diamond synthesis.
Journal ArticleDOI
Atomic h abstraction of surface h on si : an eley-rideal mechanism ?
TL;DR: In this article, the abstraction kinetics for atomic hydrogen removal of chemisorbed D and atomic deuterium (Dat) removal of adsorbed H are studied on single crystal Si surfaces, and the surface H and D coverages are measured in real time by mass analyzing the recoiled H+ and D+ ion signals.
Journal ArticleDOI
Eley–Rideal reactions between H atoms on metal and graphite surfaces: The variation of reactivity with substrate
Bret Jackson,Didier Lemoine +1 more
TL;DR: In this article, the reaction of gas-phase H atoms with H atoms adsorbed onto a variety of substrates was shown to exhibit a wide range of reactivity, and the single-collision Eley-Rideal reaction cross sections are generally small, suggesting that hot-atom processes play an important role in H2 formation on metal surfaces.
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