高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (3): 443.

• 论文 • 上一篇    下一篇

氧化铈对Pd/Al2O3表面上CO氧化性能的影响

周仁贤, 徐晓玲, 郑小明   

  1. 杭州大学催化研究所, 杭州 310028
  • 收稿日期:1995-03-28 出版日期:1996-03-24 发布日期:1996-03-24
  • 通讯作者: 周仁贤,男,31岁,硕士,讲师.
  • 作者简介:周仁贤,男,31岁,硕士,讲师.
  • 基金资助:

    浙江省科学技术委员会基金

Effect of CeO2 on Oxidation of CO over Pd/Al2O3 Catalyst

ZHOU Ren-Xian, XU Xiao-Ling, ZHENG Xiao-Ming   

  1. Institute of Catalysis, Hangzhou University, Hangzhou 310028
  • Received:1995-03-28 Online:1996-03-24 Published:1996-03-24

PDF (PC)

摘要： 采用TPD-MS及TPSR-MS技术研究了添加CeO2对Pd/Al2O3催化剂上CO脱附、表面反应及表面氧脱附等性能的影响,考察了不同含氧量的气氛下CO的氧化活性。结果表明,Pd-Ce间的相互作用有利于各自原子上表面氧的吸脱附及CO的表面反应,并发现CO2脱附量大小及峰温次序与对CO的催化氧化活性有一致的对应关系。

关键词: 催化剂, Pd, CeO2, O2-TPD, CO-TPSR

Abstract: Surface reaction properties of CO,the desorption properties of surface oxygen over Pd catalysts and their carriers were investigated by means of TPSR-MSand TPD-MS.The oxidation activity of COon these catalysts was also examined at different concentrations of oxygen.It was found that the desorbed amount of CO2 and the order of peak temperature were in good agreement with their activities.The amount of CO2 in desorbed product on oxidized alumina-supported Pd was more than that on reduced alumina-supported Pd, the disproportionation reaction of COon H2-reduced Pd/Al2O3 would form carbon and CO2. The results of O2-TPDand CO-TPSRshowed that the addition of CeO2 would promote the desorption of surface oxygen and the surface reaction of COon Pd/Al2O3.

Key words: Catalyst, Pd, CeO2, O2-TPD, CO-TPSR

TrendMD: