Oxidation of alkane using Pt/Eu₂O₃/TiO₂/SiO₂ catalyst with O₂ and H₂ in acetic acid under mild conditions

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• 作者：Ichiro Yamanaka ; Yuta Suzuki ; Masashi Toida
• 关键词：Oxidation ; Europium catalysis ; Titanium catalysis ; Platinum catalysis ; Active oxygen ; Alkane
• 刊名：Catalysis Today
• 出版年：2010
• 出版时间：17 November 2010
• 年：2010
• 卷：157
• 期：1-4
• 页码：286-290
• 全文大小：354 K

文摘

A new solid catalyst of Pt/Eu₂O₃/TiO₂/SiO₂ for oxidation of alkane was developed. Oxidation of adamantane using the multi-components supported catalyst with O₂ and H₂ 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 Eu₂O₃, TiO₂ and Pt on the SiO₂ 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 Eu₂O₃ and TiO₂ on the SiO₂ support. Eu and Ti oxides concertedly activated O₂ with electrons supplied from H₂ 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.