Accession Number:
ADA109368
Title:
Configurational Effects in the Adsorption of HD on ZnO
Descriptive Note:
Technical rept
Corporate Author:
NATIONAL BUREAU OF STANDARDS WASHINGTONDC SURFACE SCIENCE DIV
Personal Author(s):
Report Date:
1981-12-01
Pagination or Media Count:
12.0
Abstract:
Hydrogen deuterate, HD adsorption on ZnO surfaces has been studied by infrared spectroscopy as a function of ZnO temperature. It is shown that at 300K, the configuration ZnH-OD is preferred, as expected on thermodynamic grounds. As the temperature is lowered, the configuration ZnD-0H becomes preferred on kinetic grounds. We demonstrate that configuration reversal on heating must proceed via HD desorption and subsequent re-adsorption. This behavior is consistent with a model in which the transition state for HD adsorption is characterized by nearly complete dissociation of the H-D bond.
Descriptors:
Subject Categories:
- Atomic and Molecular Physics and Spectroscopy