Accession Number : ADA119742

Title :   Infrared Studies of CO Adsorption on Reduced and Oxidized Pt/TiO2.

Descriptive Note : Technical rept. 1 Jan-31 Dec 82,


Personal Author(s) : Tanaka,Katsumi ; White,J M

PDF Url : ADA119742

Report Date : 17 Aug 1982

Pagination or Media Count : 23

Abstract : Carbon monoxide adsorption experiments were studied on reduced and oxidized Pt/Ti02 with Ft-IR. On reduced samples two kinds of linear CO species were observed and assigned as adsorption on Pt close-packed (terrace) sites 1/2094 cm. In addition a bridged CO species was found at 1/1854 cm. Both linear species show increasing frequencies with coverage. Saturation CO uptake decreases with increasing substrate reduction temperature and there is a preferential decrease of linear CO CO species on terrace sites and the concentration of bridged species lies below detection limits. On oxidized Pt/Ti02 samples, some Pt atoms are covered with oxygen atoms and the density of step sites is enhanced. (Author)

Descriptors :   *Infrared spectroscopy, *Absorption, *Carbon monoxide, Platinum, Titanium oxides, Substrates, Surface chemistry, Oxidation, Reduction(Chemistry), Surface reactions, Chemisorption, Sites, Reaction kinetics

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE