期刊
GREEN CHEMISTRY
卷 15, 期 2, 页码 418-424出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2gc36555c
关键词
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资金
- New Energy and Industrial Technology Development Organization (NEDO)
- MEXT program Elements Strategy Initiative to Form Core Research Center, Japan
- Grants-in-Aid for Scientific Research [22686075] Funding Source: KAKEN
A series of transition metal(M)-loaded TiO2 catalysts (M/TiO2) and Co-loaded catalysts on various support materials were prepared by an impregnation method, followed by in situ H-2-reduction at 400 degrees C, and tested for the acceptor-free oxidation of cyclododecanol in the liquid phase. Among the catalysts including noble metal catalysts, Co/TiO2 showed the highest activity. In the presence of Co/TiO2 (0.1-3 mol%) the dehydrogenation of various aliphatic secondary alcohols proceeded to afford the corresponding ketones. The catalyst was recoverable and was reused after the H2-reduction treatment. Based on the spectroscopic characterization of the catalyst combined with the studies on the effect of the Co oxidation states on the catalytic activity, it is clarified that the surface metallic Co sites with electron deficiency are the catalytically active species.
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