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Journal of Materials Science

, Volume 29, Issue 12, pp 3172–3176 | Cite as

Ageing of fresh and used Ca-Sr-cuprate-based catalysts

  • C. Oliva
  • L. Forni
  • F. P. Vatti
  • I. E. Mukovozov
  • A. V. Vishniakov
Article

Abstract

An ageing degeneration process was observed in a Ca-Sr-cuprate catalyst, both unused and after use in an NO decomposition reaction. The formation of strongly interacting dipoles (SIDs) by Cu2+ and oxygen ions perturbs the layerlike structure, which is typical of Sr3Cu5O8 species and is also characteristic of the present catalyst when it is fresh. This phenomenon was observed with both unused and used aged samples. Furthermore, in the case of the used catalysts, the degeneration process lead to the disappearance of both the layerlike crystal structure and of the SID systems. However, the samples recover their properties when recalcined.

Keywords

Oxygen Polymer Crystal Structure Material Processing Decomposition Reaction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • C. Oliva
    • 1
  • L. Forni
    • 1
  • F. P. Vatti
    • 1
  • I. E. Mukovozov
    • 2
  • A. V. Vishniakov
    • 2
  1. 1.Dipartimento di Chimica Fisica ed Elettrochimica e Centro C.N.R.Universita' dt MilanoMilanoItaly
  2. 2.D. I. Mendeleev University of Chemical Technology of RussiaMoscowRussia

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