THE OXIDATION OF PRASEODYMIUM OXIDE. PART I. CHEMISORPTION ON PRASEODYMIUM OXIDE
Both type C and type A modifications of PrO/sub 1.5/ chemisorb oxygen at -196 deg with little or no activation energy. The amount of oxygen chemisorbed per unit surface area is greater on material of type C than on material of type A, and this difference is attributed to the high concentration of anion vacancies in the former. Anion vacancies are inherent in the type C structure but are absent from the type A structure which is close-packed. It is suggested that the extent to which type A PrO/sub 1.5/ chemisorbs oxygen is a measure of the average defect'' co-ordination number of oxygen ions around praseodymium ions on the surface. Both carbon dioxide and hydrogen are strongly bound by PrO/sub 1.5/ surfaces and are extremely difficult to remove, even at high temperatures. Their presence on the surface diminishes its chemisorptive capacity for oxygen. (auth)
- Research Organization:
- Univ. of Melbourne
- NSA Number:
- NSA-17-012259
- OSTI ID:
- 4772250
- Journal Information:
- Journal of the Chemical Society (England) Divided into J. Chem. Soc. A, J. Chem. Soc. B, etc., Journal Name: Journal of the Chemical Society (England) Divided into J. Chem. Soc. A, J. Chem. Soc. B, etc. Vol. Vol: 52-61; ISSN JCSOA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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