Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (7): 789-799.DOI: 10.19894/j.issn.1000-0518.200299

• Full Papers • Previous Articles     Next Articles

Solvent-Free Oxidation of Benzyl Alcohol to Benzaldehyde Catalyzed by Magnesium Oxide Supported Bimetallic Gold-Palladium

TIAN Shu-Yang, LYU Rong-Wen*   

  1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, DaLian 116024, China
  • Received:2020-10-03 Accepted:2021-02-24 Published:2021-07-01 Online:2021-09-01
  • About author:National Natural Science Foundation of China(No.U1608223)

Abstract: Using polyvinyl alcohol (PVA) as the protective agent, the nano-bimetallic gold-palladium was prepared by the NaBH4 reduction method and loaded on MgO-X modified by Na2SiO3 to synthesize the Au-Pd/MgO-X catalyst. The composition, structure and basic strength of the Au-Pd/MgO-X catalyst were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopry (TEM), etc. The results show that the catalyst catalyzes the oxidation of benzyl alcohol to benzaldehyde under solvent-free conditions. As the basicity of the Au-Pd/MgO-X catalyst increases, the selectivity of benzaldehyde increases. Under the conditions of 0.1 mol of benzyl alcohol, 100 mg of Au-Pd/MgO-X catalyst, 0.5 MPa of O2, reaction time of 3 h, and reaction temperature of 120 ℃, the conversion of benzyl alcohol is 49.5% and the selectivity of benzaldehyde is 94.7%. The catalyst is used repeatedly for 5 times, and there is no obvious change in activity and selectivity, indicating that the catalyst has good stability.

Key words: Magnesium oxide, Gold-palladium bimetallic, Benzyl alcohol, Oxidation, Benzaldehyde

CLC Number: