Bayberry Tannin as Stabilizer for the Synthesis of Highly Active and Reusable Heterogeneous Pd Catalysts and Their Application in the Catalytic Hydrogenation of Olefins

Bulletin of the Korean chemical society

Chen Chen¹  Wen Hua Zhang¹  Xue Pin Liao¹  Bi Shi¹  Xin Huang¹  Guang Lv¹ 

关键词: Bayberry tannin;    Pd nanoparticles;    Heterogeneous catalysts;    γ-Al2O3;    Olefin hydrogenation;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

In this study, the homogenous Pd nanoparticles (Pd NPs) were first prepared with bayberry tannin (BT) as the stabilizers. Subsequently, the obtained bayberry tannin-stabilized Pd nanoparticles (BT-Pd) were immobilized onto γ-Al2O3 to prepare heterogeneous γ-Al2O3-BT-Pd catalysts. Fourier Transformation Infrared Spectrum (FTIR) and X-ray Photoelectron Spectroscopy (XPS) analyses confirmed that the Pd NPs were well stabilized by the phenolic hydroxyl groups of BT. Transmission Electron Microscopy (TEM) observation indicated that the diameter of the Pd NPs can be effectively controlled in the range of 4.2-16.0 nm by varying the amount of BT. It is found that the γ-Al2O3-BT-Pd catalysts exhibit highly activity for various olefin hydrogenations. For example, the initial TOF (turnover frequency) of the γ-Al2O3-BT-Pd in the allyl alcohol hydrogenation is as high as 12804 mol·mol−1·h−1. Furthermore, the γ-Al2O3-BT-Pd can be reused 5 times without significant loss of activity, exhibiting a superior reusability as compared with conventionally prepared γ-Al2O3-Pd catalysts.

【 授权许可】

Unknown