高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (7): 1119.

• 研究快报 • 上一篇    下一篇

Rh-V/SiO2上H2的化学吸附方式

陈耀强, 唐水花, 张爱民, 张爱莲, 龚茂初   

  1. 四川大学化学系, 成都 610064
  • 收稿日期:1999-02-12 出版日期:1999-07-24 发布日期:1999-07-24
  • 通讯作者: 陈耀强,男,45岁,博士,教授.
  • 作者简介:陈耀强,男,45岁,博士,教授.
  • 基金资助:

    国家自然科学基金(批准号:29273117)资助课题

The Forms of Chemisorption of H2over Rh-V/SiO2

CHEN Yao-Qiang, TANG Shui-Hua, ZHANG Ai-Min, ZHANG Ai-Lian, GONG Mao-Chu   

  1. Department of Chemistry, Sichuan University, Chengdu, 610064
  • Received:1999-02-12 Online:1999-07-24 Published:1999-07-24

摘要: CO加氢反应机理是许多研究者感兴趣的课题.负载的Rh是CO加氢反应的优良催化剂.CO在Rh上吸附态的研究已有许多报道,而对H2有关的吸附态的研究却少见报道.

关键词: Rh-V/SiO2催化剂, CO吸附, H2的化学吸附方式, FTIR

Abstract: The forms of chemisorption of H2over Rh-V/SiO2have been studied by infrared spectroscopy. On 0.7% Rh-V/SiO2, gem dicarbonyl band are observed at 2092 and 2029cm-1for Co adsorption, while on 3%Rh-V/SiO2in addition to gem dicarbonyl bands appearing at 2092 and 2029 cm-1, linear CO and bridged COb ands are observed at 2066 and 1873 cm-1, respectively. On 0.7%Rh-V/SiO2one band for Rh Hvibration is observed at 1865cm-1, while two bands appearing at 1988 and 1865 cm-1resectively for Rh Hvibration are obtained over 3%Rh-V/SiO2By comparison with CO adsorption on R-V/SiO2catalysts, the band at 1865cm-1can be designed to adsorbed hydrogen on the isolated Rh sites, and the band at 1988cm-1to adsorption of H2on crystalline Rh.

Key words: Rh-V/SiO2catalysts, CO adsorption, The forms of chemisorbed hydrogen, FTIR

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