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Preparation of Highly Dispersed Pd–Cu on Silica for the Aerobic Hydroxylation of Benzene to Phenol Under Ambient Conditions

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Abstract

Highly dispersed Pd–Cu on silica was synthesized under sonication and used as a catalyst for the hydroxylation of benzene using air, O2 and H2O2 as oxidants. Air was found to be better oxidant for phenol yield (225 μmol/g catalyst) and selectivity with neat benzene. However, when aqueous H2SO4 and CH3CN mixture was used as solvent there was a remarkable increase in the phenol yield (129 μmol/0.1 g catalyst). The catalyst was recycled 5 times without any significant loss in its activity.

Graphical Abstract

Pd–Cu on silica was synthesized under sonication and used as a catalyst for the hydroxylation of benzene using air, O2 and H2O2 as oxidants. Air was found to be better oxidant for phenol yield (225 µmol/g catalyst) and selectivity with neat benzene.

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Acknowledgements

The authors express their thanks to Korea Research Foundation, South Korea for financial support, Director’s CSMCRI and KIER for encouragement.

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Correspondence to H. C. Bajaj.

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Boricha, A.B., Bajaj, H.C., Kim, T.H. et al. Preparation of Highly Dispersed Pd–Cu on Silica for the Aerobic Hydroxylation of Benzene to Phenol Under Ambient Conditions. Catal Lett 137, 202–209 (2010). https://doi.org/10.1007/s10562-010-0364-6

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  • DOI: https://doi.org/10.1007/s10562-010-0364-6

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