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- Title
Electronic Excitations in the Course of the Reaction of H with Coinage and Noble Metal Surfaces: A Comparison.
- Authors
Schindler, Beate; Diesing, Detlef; Hasselbrink, Eckart
- Abstract
The creation of electronic excitations during the reaction of atomic hydrogen on and with coinage and noble metals has been studied using metal-insulator-metal heterostructures. A characteristic current trace is observed when the outer metal surface of the structure is exposed to a 20 s pulse of H atoms. Comparison to the chemical kinetics allows to disentangle the contributions from the different chemical processes to this current. In the case of the coinage metals studied the observation is interpreted to suggest that predominantly electrons excited in connection with the hydrogen recombination reaction are the source of the current. For Pt such phenomenon is not observed. This difference allows insights into the role of the transition state for the non-adiabaticity in this simple chemical reaction.
- Subjects
ELECTRONIC excitation; HYDROGEN; METAL-insulator-metal devices; METALLIC surfaces; ATOMIC hydrogen; HYDROGEN spectra
- Publication
Zeitschrift für Physikalische Chemie, 2013, Vol 227, Issue 11, p1381
- ISSN
0942-9352
- Publication type
Article
- DOI
10.1524/zpch.2013.0408