Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 485 - 494 (1982)
Update date:2022-08-23
Topics:
Baussart, Herve
Delobel, Rene
Bras, Michel Le
Maguer, Didier Le
Leroy, Jean-Marie
The selective oxidation of propene to acrolein over USb3O10 was studied in a continuous flow reactor.Our experimental results show that the preparation of a well-defined catalyst of uniform composition depends on the temperature and time of calcination.The kinetic data indicate that acrolein is formed via a redox mechanism in which the surface of the catalyst is partially reduced.Moessbauer spectroscopy reveals the presence of Sb(5+) and Sb(3+) in the used catalyst.I.r. spectroscopy shows a structural modification.On the basis of these results we conclude that each steady-state condition is characterized by a vacancy concentration leading to the observed modifications of the catalyst.
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