Oxygen on iron oxide: Kinetic evidence of an atomic species

B. L. Yang, H. H. Kung

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Abstract

Oxygen adsorbed on α-Fe2O3 in three different forms over the temperature range from 450 °C to room temperature. The form that adsorbed and desorbed between 200 and 300 °C desorbed with a second-order kinetics which suggested its atomic nature. The activation energy of desorption was found to be 163 ± 8 kJ/mole, and the initial coverage at 240 °C was 1.4 × 1016 molecules/m2. It was postulated that the adsorption and desorption of this species involved pairs of surface iron ions containing coordinative unsaturation, while surface mobility of the species was provided by single surface iron ions.

Original languageEnglish
Pages (from-to)329-336
Number of pages8
JournalJournal of Catalysis
Volume75
Issue number2
DOIs
Publication statusPublished - Jun 1982

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ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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