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.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE