高等学校化学学报

高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (1): 6.

• 论文 • 上一篇    下一篇

嵌入Y型沸石中Pd簇的合成及其催化性能

嵇天浩, 孟宪平, 吴念祖, 李士杰, 刘英骏   

  1. 北京大学物理化学研究所, 北京, 100871
  • 收稿日期:1996-01-30 出版日期:1997-01-24 发布日期:1997-01-24
  • 通讯作者: 孟宪平.
  • 作者简介:嵇天浩, 男, 30岁, 博士, 现为中国科学院物理所博士后.
  • 基金资助:

    国家自然科学基金

The Synthesis and Catalytic Performance of Pd Cluster Encaged in Y-type Zeolite

JI Tian-Hao, MENG Xian-Ping, WU Nian-Zu, LI Shi-Jie, LIU Ying-Jun   

  1. Institute of Physical Chemistry, Peking University, Beijing, 100871
  • Received:1996-01-30 Online:1997-01-24 Published:1997-01-24

PDF (PC)

被引次数

21

摘要： 以[Pd(NH3)4](NO3)2·H2O作为离子交换前驱物,应用微波交换-氢还原法合成了嵌入Y型沸石中的Pd簇合物.XRD和XPS测试结果表明,在合成过程中,焙烧阶段的温度是影响Pd原子进入沸石体相形成Pd簇的主要因素.在焙烧温度240C和还原温度210C的制备条件下,Pd含量高达6.13％(质量分数)也能进入Y型沸石体相形成Pd簇.在相同条件下制得Pd含量仅为0.410％(质量分数)的样品,在空速2000h－1及室温的反应条件下,CO氧化的转化率即可达100％.因此,嵌入Pd簇后的Y型沸石是极好的低温CO氧化催化剂.

关键词: Pd簇, Y型沸石, CO完全氧化催化剂

Abstract: The palladium cluster encaged in Y-type zeolite has been synthesized by the method of microwave radiation ion exchange-hydrogen reduction with [Pd (NH3)4](NO3)2.H2Oas precursor of ion exchange.The results of XRDand XPSshow that calcination tem-perature has an important influence on the Pd atoms encaging into zeolite NaYand the for-mation of Pd clusters.When the Pd content in zeolite Yis 6.13%, Pd can be also encaged in zeolite Yand form cluster under the condition of preparation at 240 Cof calcination temper-ature and 210 Cof reduction temperature.Using the sample of Pd content 0.410% obtained under the same conditions, the conversion on COcomplete oxidation is 100% at room tem-perature and at 2000 h-1 (space velocity).Therefor, Pd cluster encaged Y-type zeolite is an excellent catalyst for complete oxidation of carbon monoxide.

Key words: Pd cluster, Y-type zeolite, CO complete oxidation catalyst

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