Effect of Sulfation on the Acid-Base Properties of Tetragonal Zirconia. A Calorimetric and IR Spectroscopic Study

被引：0
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作者：
Vera Bolis
Giuliana Magnacca
Giuseppina Cerrato
Claudio Morterra
机构：
[1] Università del Piemonte Orientale “Amedeo Avogadro”,Dipartimento di Scienze Chimiche, Alimentari, Farmaceutiche e Farmacologiche
[2] Via Bovio 63,Dipartimento di Chimica IFM
[3] Università di Torino,undefined
来源：
Topics in Catalysis | 2002年 / 19卷
关键词：
zirconia; sulfated zirconia; microcalorimetry; IR spectroscopy; CO; adsorption; basic properties; Lewis acidity; catalysis;
D O I：
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学科分类号：
摘要：
The RT adsorption of CO2 was studied in order to compare the surface acid-base properties of yttria-stabilized tetragonal ZrO2, either plain or variously sulfated. The nature of the species formed upon CO2 adsorption, as well as their stability upon outgassing, was monitored by IR spectroscopy, whereas the population of the sites and their energy distribution was studied by microcalorimetry. The effect of sulfation on the basicity of cus Zr4+/O2- pairs and on the Lewis acidic strength of cus Zr4+ cations, as well as the influence of calcination on the amount and nature of surface sulfates were studied and correlated with the catalytic activity of SZ systems.
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页码：259 / 269
页数：10
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