Abstract
Amorphous silica was modified by doping with titania through a surface sol–gel process and applied as the support for depositing gold. These doped silica-supported gold catalysts were tested in the selective cyclohexane oxidation to cyclohexanone and cyclohexanol using oxygen. Under the oxidation conditions of 150 °C, 1.5 MPa and 3 h, a selectivity of 91.7% for cyclohexanone and cyclohexanol could be reached over the gold catalyst, affording a cyclohexane conversion of 8.4% and a turnover frequency up to 40,133 per hour. Moreover, the catalytic activity and selectivity could be well retained in 4 recycling oxidation reactions, showing a high stability of the gold catalyst supported on titania-doped silica.
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Financial support of Project 20376073 by the National Natural Science Foundation of China is gratefully acknowledged.
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Xu, LX., He, CH., Zhu, MQ. et al. Silica-Supported Gold Catalyst Modified by Doping with Titania for Cyclohexane Oxidation. Catal Lett 118, 248–253 (2007). https://doi.org/10.1007/s10562-007-9178-6
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DOI: https://doi.org/10.1007/s10562-007-9178-6