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

The stability of the oxidation state of antimony ion in SnSbO catalysts under the influence of operating conditions was investigated by Mössbauer 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.