催化学报 ›› 2013, Vol. 34 ›› Issue (5): 1013-1019.DOI: 10.1016/S1872-2067(12)60534-8

• 研究论文 • 上一篇    下一篇

高活性Au/SnO2催化剂的制备及其在1,4-丁二醇氧化制γ-丁内酯反应中的催化应用

李娴a, 郑嘉旻a, 杨新丽b, 戴维林a, 范康年a   

  1. a 复旦大学化学系, 上海市分子催化和功能材料重点实验室, 上海 200433;<;
    b r>;
    b 河南工业大学化学化工学院, 河南 郑州 450001
  • 收稿日期:2012-11-26 修回日期:2013-05-20 出版日期:2013-05-06 发布日期:2013-05-06
  • 通讯作者: 戴维林

Preparation and application of highly efficient Au/SnO2 catalyst in the oxidative lactonization of 1,4-butanediol to γ-butyrolactone

LI Xiana, ZHENG Jiamina, YANG Xinlib, DAI Weilina, FAN Kangniana   

  1. a Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China;
    b College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China
  • Received:2012-11-26 Revised:2013-05-20 Online:2013-05-06 Published:2013-05-06

摘要:

采用沉积沉淀法制备了一系列商业SnO2负载的纳米Au催化剂, 通过电感耦合等离子体发射光谱、X射线粉末衍射、透射电镜和X射线光电子能谱等方法研究了溶液酸碱性、沉淀剂种类、Au负载量和焙烧温度等对催化剂性质的影响.结果表明, Au的负载量以及催化剂的焙烧温度对Au颗粒状态有较大影响.其中, 于573 K焙烧的3%Au/SnO2催化剂在1,4-丁二醇氧化制备γ-丁内酯反应中的催化活性最好, TOF值是Au/TiO2催化剂的15倍.这主要是由于SnO2载体独特的性质对所负载的Au颗粒的影响.

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关键词: 金催化, 二氧化锡, 沉积沉淀法, 1,4-丁二醇, 氧化内酯化, 焙烧温度, 金负载量

Abstract:

A series of gold catalysts supported on commercial SnO2 were synthesized by deposition-precipitation while accurately controlling pH and precipitant species. The supported catalysts were characterized by X-ray diffraction, inductively coupled plasma atomic emission spectrometry, transmission electron microscopy, and X-ray photoelectron spectroscopy. Gold loading and calcination temperature both affected the dispersion and nature of gold species on SnO2. The performance of the catalysts in the oxidative lactonization of 1,4-butanediol to g-butyrolactone was investigated. The catalyst with 3% gold that was calcined at 573 K exhibited the highest activity, which was 15 times higher than that of Au/TiO2. The excellent catalytic performance was attributed to the high dispersion of gold particles and adequate Au0 and Auδ- species formed because of the strong interaction between Au and SnO2 and the intrinsic properties of SnO2.

Key words: Gold catalyst, Tin dioxide, Deposition-precipitation method, 1,4-Butanediol, Oxidative lactonization, Calcination temperature, Gold loading