Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
115 (2001), S. 9947-9959
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Adsorption and reaction of hydrogen (deuterium) on the Ir{111} surface has been studied with temperature-programmed desorption and direct measurements of desorbing molecules using a quadrupole mass spectrometer at ∼100 K. H2 exposure of the D-precovered Ir{111} surface was found to induce the desorption of HD and D2 molecules. This result suggests that energetic H atoms (hot H atoms) produced in the dissociation process of incident H2 molecules react with preadsorbed D atoms and desorb as HD molecules or produce secondary energetic D atoms via energy transfer. Secondary energetic D atoms (secondary hot D atoms) also induce the associative reactions with preadsorbed D atoms and desorb as D2 molecules. We will discuss the hot-H-atom-mediated reaction based on both empirical and steady-state approximation models for interpreting the present experimental results. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1415494
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