Abstract
A new solid catalyst of Pt/Eu 2O 3/TiO 2/SiO 2 for oxidation of alkane was developed. Oxidation of adamantane using the multi-components supported catalyst with O 2 and H 2 was studied in acetic acid at 313 K. Several multi-components supported catalysts were prepared and tested the oxidation activity. It is found that loading order of Eu 2O 3, TiO 2 and Pt on the SiO 2 support strongly affected the oxidation catalysis. The active catalysts model was proposed from TEM-EDS analysis that very small Pt particles well dispersed on amorphous Eu 2O 3 and TiO 2 on the SiO 2 support. Eu and Ti oxides concertedly activated O 2 with electrons supplied from H 2 on Pt, and active oxygen species efficiently oxidized adamantane and other alkanes to oxygenated compounds. Active oxygen species could not be identified but its reactivity was studied. It showed radical nature for oxidation of alkanes and a cleavage of C–H bond was the rate-determining step during the oxidation.
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