Applied Catalysis A: General, Vol.209, No.1-2, 383-390, 2001
Redox processes in Sb-containing mixed oxides used in oxidation catalysis I. Tin dioxide assisted antimony oxidation in solid state
The stability of the oxidation state of antimony ion in Sn-Sb-O catalysts under the influence of operating conditions was investigated by Mossbauer spectroscopy. It was shown that the presence of the tin dioxide matrix facilitates the oxidation of the antimony ion; at the same time, the Sb5+ ions in the SnO2 rutile matrix show much higher stability under slightly reducing conditions provided by the catalytic test of propylene oxidation.