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

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)

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Document Details

Document Type
Technical Report
Publication Date
Aug 17, 1982
Accession Number
ADA119742

Entities

People

  • J. Michael White
  • Katsumi Tanaka

Organizations

  • University of Texas at Austin

Tags

DTIC Thesaurus Topics

  • Adsorption
  • Carbon Monoxide
  • Catalysis
  • Catalysts
  • Chemistry
  • Detection
  • Dielectric Gases
  • Governments
  • Military Research
  • Oxygen
  • Saturation
  • Substrates
  • United States
  • United States Government

Fields of Study

  • Environmental science

Readers

  • Electrochemical Surface Science
  • Mathematics or Statistics
  • Organic Chemistry