Surface Characterization of Cu-ion Implanted Single Crystal and Thin Film ZnO for Catalytic Applications.
Abstract
Single crystals and thin films of zinc oxide were implanted with copper ions in order to study the catalytic properties of a mixed Cu-ZnO system. ZnO is widely used as a catalyst in the methanol synthesis reaction, and copper has been noted to have a synergistic effect on the rates and yields of reaction. The samples were characterized by x-ray photoelectron spectroscopy (XPS) before and after implantation, and surface copper concentration in the implanted specimens was determined. Implanted samples were heated under oxidizing and reducing atmospheres and re-examined by XPS to determine the oxidation state of the implanted copper species. XPS results demonstrated that the oxidation state of the copper could be manipulated, although there was a corresponding decrease in the concentration of the surface copper ions, relative to temperature and time of heating. jg p.3
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1995
- Accession Number
- ADA296022
Entities
People
- D. Chadwick
- J. S. Brodkin
Organizations
- United States Army Research Laboratory