Initial oxidation of Zn(0001) surfaces: H/sub 2/ adsorption and XPS studies
Journal Article
·
· J. Vac. Sci. Technol., A; (United States)
H/sub 2/ adsorption capacity measurements have been combined with XPS intensity measurements to study the kinetics of O/sub 2/ uptake on Zn(0001) surfaces. On clean Zn(0001) the temperature programmed desorption spectrum of H/sub 2/ shows half-order desorption kinetics and an apparent desorption energy of 11 kcal/mole. As the surface is oxidized by progressive dosing with O/sub 2/, two features are noted: The H/sub 2/ desorption spectrum characteristic of clean Zn(0001) is attenuated in a nonlinear fashion and a new H/sub 2/ desorption state with an activation energy of 18 kcal/mole is observed for surfaces with less than saturation oxygen coverage. XPS results indicate that H/sub 2/ adsorption is not completely blocked until an oxygen coverage corresponding to approximately 3 monolayers is achieved. Both H/sub 2/ uptake and XPS intensity measurements also indicate that the oxygen sticking coefficient increases with oxygen coverage up to about one half of the O/sub 2/ saturation coverage. These results indicate that the initial oxidation of Zn surfaces involves the formation and growth of multilayer oxide islands, where oxygen incorporation at the perimeter of the islands is the rate limiting step.
- Research Organization:
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
- DOE Contract Number:
- AC02-79ER10450
- OSTI ID:
- 5790684
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 3:3; ISSN JVTAD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oxidation of H2S by coadsorbed oxygen on the α-Cr2O3(0001) surface
Coordination chemistry of NH sub 3 on ZnO(0001) and CuCl(111) surfaces:. sigma. -bonding interactions with d sup 10 metal ion sites
Adsorption of hydrogen, carbon monoxide, and nitrogen on rhenium(0001) and copper overlayers on rhenium(0001)
Journal Article
·
Mon Feb 28 23:00:00 EST 2011
· Surface Science
·
OSTI ID:1009720
Coordination chemistry of NH sub 3 on ZnO(0001) and CuCl(111) surfaces:. sigma. -bonding interactions with d sup 10 metal ion sites
Journal Article
·
Tue Feb 18 23:00:00 EST 1992
· Inorganic Chemistry; (United States)
·
OSTI ID:7046997
Adsorption of hydrogen, carbon monoxide, and nitrogen on rhenium(0001) and copper overlayers on rhenium(0001)
Journal Article
·
Wed Feb 21 23:00:00 EST 1990
· Journal of Physical Chemistry; (USA)
·
OSTI ID:6665116
Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ADSORPTION
CHEMICAL REACTIONS
DESORPTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
HYDROGEN
IONIZING RADIATIONS
METALS
NONMETALS
OXIDATION
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
X RADIATION
ZINC
360104* -- Metals & Alloys-- Physical Properties
ADSORPTION
CHEMICAL REACTIONS
DESORPTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
HYDROGEN
IONIZING RADIATIONS
METALS
NONMETALS
OXIDATION
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
X RADIATION
ZINC