高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (S1): 1.

• 研究论文 •    下一篇

溶剂化金属原子浸渍法制备纳米粒子Pd/γ-Al2O3低温CO氧化催化剂

杨秀檁, 黄唯平, 张守民, 郑修成, 李保庆, 吴世华   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:2001-06-25 出版日期:2001-12-31 发布日期:2001-12-31
  • 通讯作者: 吴世华(1945年出生),男,教授,博士生导师.主要从事无机合成与材料、催化等方面的研究.

Preparation of Nano-Particle Pd/γ-Al2O3 Catalysts for Low-Temperature CO Oxidation by Solyated Metal Atom Impregnation Method

Yang Xiu-Lin, Huang Wei-Ping, Zhang Shou-Min, Zheng Xiu-Cheng, Li Bao-Qing, Wu Shi-Hua   

  1. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2001-06-25 Online:2001-12-31 Published:2001-12-31

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摘要：

用溶剂化金属原子浸渍法制备了不同钯含量的高分散Pd/γ-Al2O3催化剂,XRD和化学吸收测定结果表明,随着钯含量的增加,钯颗粒度增大,但直径都在2.0~6.0nm范围内.XPS研究表明,钯处于金属态.Pd/γ-Al2O3在较低温度下就显示出CO氧化催化活性,在453K时CO的转化率都可达到100%,随着钯粒度减小,催化活性升高,钯颗粒度为2.1nm的Pd/γ-Al2O3催化剂活性最高.

关键词: 一氧化碳, 低温氧化, 钯, 溶剂化金属原子浸渍法

Abstract:

Nano-particle Pd/γ-Al2O3 catalysts with different Pd content were prepared by solvated metal atom impregnation technique. The results of XRD and Chemisorption measurement showed that as the metal content increased the particle size of Palladium increased; but the diameter of Pd particles in all the Pd/γ-Al2O3 catalysts studied was in the range of 2.0-6.0nm. XPS study indicated that Paiiadium was in metallic slate. The Pd/γ-Al2O3 catalysts exhibited higher activity for CO oxidation at lower temperature. 100% CO conversion was achieved at 453K. As the particle size of Palladium increased the catalytic activity increased. The Pd/γ-Al2O3 catalyst with Pd panicle size of 2. Inm showed the highest activity.

Key words: Carbon Monoxide, Low-temperature Oxidation, Palladium, Solvated Metal Atom, Impreg-nation Method

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