催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (1): 37-40.

• 研究论文 • 上一篇    下一篇

限域于SBA-15孔道内的活性相聚集形态

李常丽,张庆红,王野,万惠霖   

  1. 厦门大学化学化工学院固体表面物理化学国家重点实验室, 福建厦门 361005
  • 收稿日期:2008-01-25 出版日期:2008-01-25 发布日期:2011-12-25

Assembling Forms of Active Phases Confined within SBA-15 Channels

LI Changli, ZHANG Qinghong*, WANG Ye, WAN Huilin*   

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2008-01-25 Online:2008-01-25 Published:2011-12-25

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1022

被引次数

29

摘要： 针对Pd/SBA-15和MoO3/SBA-15两类催化剂样品,使用N2物理吸附手段对比研究了限域于介孔SBA-15分子筛孔道内活性相Pd与MoO3的聚集形态. 结果表明,金属Pd以颗粒状形态分布在SBA-15分子筛孔道内,氧化物MoO3则以层状形态存在. 并用高分辨透射电镜验证了此分析结果.

关键词: 钯, 三氧化钼, 活性相, 聚集形态, SBA-15分子筛, 吸附-脱附等温线, 苯甲醇, 氧化

Abstract: The assembling forms of active phases in Pd/SBA-15(ad) and MoO3/SBA-15 catalyst samples, prepared via adsorption-reduction and impregnation-reduction, respectively, were characterized by N2 physisorption measurement. Based on N2 adsorption-desorption isotherms, it was speculated that the palladium species in Pd/SBA-15(ad) exist as nanoparticles, whereas the MoO3 species in MoO3/SBA-15 are layered dispersed on the wall within the SBA-15 channels. These speculations were further confirmed by HR-TEM observation. The SBA-15 confined uniform Pd nanoparticles were efficient for solvent-free aerobic oxidation of benzyl alcohol.

Key words: palladium, molybdenum trioxide, active phase, assembling form, SBA-15 zeolite, adsorption-desorption isotherm, benzyl alcohol, oxidation