催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (12): 1831-1837.DOI: 10.1016/S1872-2067(10)60289-6

• 研究论文 • 上一篇    下一篇

常压下 Pt-Bi 双金属催化剂上甘油选择性氧化

梁丹 1, 崔世玉 2, 高静 1, 王军华 1, 陈平 1, 侯昭胤 1,*   

  1. 1 浙江大学化学系催化研究所, 浙江杭州 310028; 2 山东化工技师学院化工系, 山东滕州 277500
  • 收稿日期:2011-07-14 修回日期:2011-09-14 出版日期:2011-12-21 发布日期:2015-04-23

Glycerol Oxidation with Oxygen over Bimetallic Pt-Bi Catalysts under Atmospheric Pressure

LIANG Dan1, CUI Shiyu2, GAO Jing1, WANG Junhua1, CHEN Ping1, HOU Zhaoyin1,*   

  1. 1Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, Zhejiang, China; 2Department of Chemical Engineering, Shandong College of Chemical Technicians, Tengzhou 277500, Shandong, China
  • Received:2011-07-14 Revised:2011-09-14 Online:2011-12-21 Published:2015-04-23

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1188

被引次数

26

摘要： 制备了一系列活性碳 (AC) 负载的 Pt-Bi 双金属催化剂, 考察了催化剂中 Bi 含量对其催化甘油选择性氧化反应性能的影响. 结果表明, 适量 Bi 的添加可以改善催化剂中 Pt 的氧化还原性能, 从而有利于催化剂活性的提高和二羟基丙酮 (DIHA) 产物的生成. 当 Bi 的含量为 5% 时, 该催化剂的活性最高, 甘油转化率和 DIHA 选择性分别达到 91.5% 和 49.0%. 表征结果显示, Pt-Bi 颗粒的平均粒径为 3.8 nm, 且高度分散在催化剂表面, 这是该催化剂具有较高活性的主要原因.

关键词: 甘油氧化, 铂, 铋, 活性碳载体, 二羟基丙酮

Abstract: A series of bimetallic Pt-Bi catalysts with a constant platinum content of 5.0 wt% and a varied bismuth content (3.0–7.0 wt%) supported on active carbon were prepared and used for glycerol oxidation with oxygen under atmospheric pressure. The bimetallic Pt-Bi/C was efficient for the selective oxidation of glycerol to dihydroxyacetone (DIHA) and the selectivity for DIHA reached 49.0% at a 91.5% conversion of glycerol over the 5%Pt-5%Bi/C catalyst. X-ray diffraction and transmission electron microscopy analysis revealed that the specially configured Pt-Bi nanoparticles in 5%Pt-5%Bi/C were highly dispersed (3.8 nm) over the active carbon support, which is proposed to contribute to the improved performance.

Key words: glycerol oxidation, platinum, bismuth, carbon support, dihydroxyacetone