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题名: Characterization of Acid-base Property of ZrO2 by Thermal Desorption: 1. TPD Studies of Acid and Base Probes
作者: Xu Boqing1;  Tsutomu, Yamaguchi2;  Koze, Tanabe2;  Liang Juan3;  Zheng Lubin3
关键词: Zirconium dioxide ;  Acid-base property ;  Acid and base probes ;  TPD ;  IR
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1994
DOI: 10.3866/PKU.WHXB19940204
卷: 10, 期:2, 页:107-113
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Acid-base properties of ZrO2 pretreated at 873 K have been studied in relation to a typical acidic SiO2-Al2O3 and a typical basic MgO catalysts by examining the TPD behavior of NH3,CO2, pyridine, Et3N, and phenol. The weakly acidic property of ZrO2 is evidenced by a much lower desorption temperature of NH3 in comparison with that of SiO2-Al2O3, and its weakly basic property by a much lower desorption temperature of CO2 in comparison with that of MgO. NH3,pyridine and Et3N show similar TPD profiles though decomposition to CH3CN occurs in the TPD process of Et3N. It is shown by the IR of adsorbed NH3 that the acid sites on ZrO2 are Lewis acidic in nature, and some of them c. become more acidic in strength at elevated temperatures, Three TPD peaks on the TPD profiles of NH3 and CO2 are observed,respectively.The temperature range of NH3-peaks is very close to that of CO2-peaks. It is concluded from these observations that the strength of the acid and base sites on ZrO2 are well matched, and that ZrO2 is a typical acid base bifunctional catalyst. A discussion on the relation between the adsorbed surface species and the desorption of NH3 and CO2 is given based on the IR results of adsorbed NH3 and CO2, respectively.
语种: 英语
WOS记录号: WOS:000207588900004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139413
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Sch Chem Engn, Dept Chem, Dalian 116012, Peoples R China
2.Hokkaido Univ, Fac Sci, Dept Chem, Sapporo, Hokkaido 060, Japan
3.Acad Sinica, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Xu Boqing,Tsutomu, Yamaguchi,Koze, Tanabe,et al. Characterization of Acid-base Property of ZrO2 by Thermal Desorption: 1. TPD Studies of Acid and Base Probes[J]. ACTA PHYSICO-CHIMICA SINICA,1994,10(2):107-113.
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