Redox processes in Sb-containing mixed oxides used in oxidation catalysis I. Tin dioxide assisted antimony oxidation in solid state

摘要

The stability of the oxidation state of antimony ion in Sn-Sb-O catalysts under the influence of operating conditions was ;estigated by Mossbauer spectroscopy. It was shown that the presence of the tin dioxide matrix facilitates the oxidation of ~ antimony ion; at the same time, the Sb5+ ions in the SnO2 fUtile matrix show much higher stability under slightly reducing nditions provided by the catalytic test of propylene oxidation.