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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (4): 345-351. 上一篇    下一篇

研究论文

Pd/La0.5Pb0.5Mn0.9Sn0.1O3对甲苷伯羟基的选择催化氧化

袁 华* 杜治平 闫志国 吴元欣

  

  1. (武汉工程大学 绿色化工过程省部共建教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室
    武汉 430073)

  • 投稿日期:2008-03-22 修回日期:2008-09-25 发布日期:2009-02-28
  • 通讯作者: 袁华

Selective Oxidation of Primary Alcohol from Methyl Glucoside over Pd/La0.5Pb0.5Mn0.9Sn0.1O3 Catalyst

Yuan, Hua* Du, Zhiping Yan, Zhiguo Wu, Yuanxin   

  1. (Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor and
    Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430073)
  • Received:2008-03-22 Revised:2008-09-25 Published:2009-02-28
  • Contact: Yuan, Hua

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1773

被引次数

19

用柠檬酸络合法制备了掺杂钙钛矿型复合金属氧化物载体, 采用沉淀法负载活性组分钯得到催化剂Pd/La0.5Pb0.5Mn0.9Sn0.1O3, 用XRD, SEM和XPS对载体和催化剂结构进行了表征分析, 考察了催化剂和氧化工艺条件对甲基葡萄糖苷的伯羟基选择氧化合成葡萄糖醛酸及其内酯的催化活性的影响. 结果表明, 载体La0.5Pb0.5Mn0.9Sn0.1O3由于掺杂效应而具有较强的助氧化还原能力, 有利于实现活性组分Pd在催化过程中的氧化还原循环. 在Pd负载量为1%、温度70 ℃、pH值为9的条件下, 葡萄糖醛酸及内酯的总收率达到60%, 反应选择性良好.

关键词: Pd/La0.5Pb0.5Mn0.9Sn0.1O3催化剂, 甲基葡萄糖苷, 葡萄糖醛酸, 催化氧化

Pd/La0.5Pb0.5Mn0.9Sn0.1O3 was prepared and applied to the selective catalytic oxidation of primary alcohol from methyl glucoside. The perovskite supports and the catalyst samples were characterized by XRD, SEM and XPS techniques. The effect of different catalyst and different conditions of catalytic oxidation on the yield of glucuronic acid was discussed. The results showed that the supports with lattice defection by doping could improve redox ability to Pd active component due to the formation of oxygen vacancy. The total yield of glucuronic acid and glucuronolactone reached 60% at optimum conditions, and the catalyst had good selectivity.

Key words: Pd/La0.5Pb0.5Mn0.9Sn0.1O3 catalyst, methyl glucoside, glucuronic acid, catalytic oxidation