Functionalized Poly(ethylene glycol)-Stabilized Water-Soluble Palladium Nanoparticles: Property/Activity Relationship for the Aerobic Alcohol Oxidation in Water
Functionalized Poly(ethylene glycol)-Stabilized Water-Soluble Palladium Nanoparticles: Property/Activity Relationship for the Aerobic Alcohol Oxidation in Water
复制标题
功能化聚乙二醇稳定的水溶性钯纳米粒子：水中有氧醇氧化的性质/活性关系
DOI：
10.1021/la9027755
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发表时间：
2010-02-16
期刊：
影响因子：
3.9
通讯作者：
Huang, Qingfa
中科院分区：
文献类型：
--
作者：
Feng, Bo;Hou, Zhenshan;Huang, Qingfa
研究了以官能化聚乙二醇为保护配体的水溶性钯纳米粒子的制备、表征及其在水相好氧氧化反应中的催化性能。UV/Vis光谱和X-射线光电子能谱(XPS)表明，双齿氮配体与钯原子之间存在电子相互作用。透射电子显微镜和XPS分析表明，通过改变保护配体的用量和还原剂的种类，可以控制生成的钯纳米粒子的粒径和表面性质。研究发现，钯纳米粒子的大小和表面性质对催化性能有很大的影响。在本体系中，稳定的金属钯纳米粒子被证明是苯甲醇氧化的活性中心，水溶性钯纳米催化剂也可以扩展到对各种醇的选择氧化。
The preparation, characterization, and catalytic properties of water-soluble palladium nanoparticles stabilized by the functionalized-poly(ethylene glycol) as a protective ligand were demonstrated for aerobic oxidation of alcohols in aqueous phase. UV/vis spectra and X-ray photoelectron spectroscopy (XPS) proved that there was ail electronic interaction between the bidentate nitrogen ligand and palladium atoms. Transmission electron microscopy and XPS analysis showed that the particle size and surface properties of the generated palladium nanoparticles can be controlled by varying the amount of protective ligand and the kinds of reducing agents. It was found that both the size and Surface properties of palladium nanoparticles played very important roles in affecting catalytic performance. The stabilized metallic palladium nanoparticles were proven to be the active centers for benzyl alcohol oxidation in the present system, and the water-soluble Pd nanocatalysts can also be extended to the selective oxidation of various alcohols.