Dissociative Adsorption of CO2 on Oxidized and Reduced Pt/TiO2.
Abstract
On both oxidized and reduced Pt/TiO2, carbon dioxide decomposes at room temperature to form chemisorbed oxygen atoms and carbon monoxide. In the absence of Pt no decomposition was found. On reduced samples, the oxygen atoms were stabilized on the titania support and reacted further with CO2 to form adsorbed bidentate carbonate. On reduced Pt/TiO2, the adsorbed CO produced in the decomposition reaction produced a linearly bound species at step sites in the initial stages of the reaction. As the reaction proceeded, CO adsorbed linearly on terrace sites was found. On oxidized Pt/TiO2, the decomposition rate was much slower and only linear step site species were observed. From the results we conclude that Pt step sites are the active sites for CO2 dissociation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1982
- Accession Number
- ADA117890
Entities
People
- J. Michael White
- Katsumi Tanaka
Organizations
- University of Texas at Austin