Effect of sulfation on the acid-base properties of tetragonal zirconia. A calorimetric and IR spectroscopic study

Vera Bolis; Giuliana Magnacca; Giuseppina Cerrato; Claudio Morterra

doi:10.1023/a:1015332727610

Effect of sulfation on the acid-base properties of tetragonal zirconia. A calorimetric and IR spectroscopic study

Vera Bolis, Giuliana Magnacca, Giuseppina Cerrato, Claudio Morterra

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

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 micro-calorimetry. The effect of sulfation on the basicity of cus Zr⁴⁺/O^2- 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.

Lingua originale	Inglese
pagine (da-a)	259-269
Numero di pagine	11
Rivista	Topics in Catalysis
Volume	19
Numero di pubblicazione	3-4
DOI	https://doi.org/10.1023/a:1015332727610
Stato di pubblicazione	Pubblicato - 1 mag 2002
Pubblicato esternamente	Sì

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10.1023/a:1015332727610

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title = "Effect of sulfation on the acid-base properties of tetragonal zirconia. A calorimetric and IR spectroscopic study",

abstract = "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 micro-calorimetry. 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.",

keywords = "Basic properties, CO adsorption, Catalysis, IR spectroscopy, Lewis acidity, Microcalorimetry, Sulfated zirconia, Zirconia",

author = "Vera Bolis and Giuliana Magnacca and Giuseppina Cerrato and Claudio Morterra",

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T1 - Effect of sulfation on the acid-base properties of tetragonal zirconia. A calorimetric and IR spectroscopic study

AU - Bolis, Vera

AU - Magnacca, Giuliana

AU - Cerrato, Giuseppina

AU - Morterra, Claudio

PY - 2002/5/1

Y1 - 2002/5/1

N2 - 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 micro-calorimetry. 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.

AB - 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 micro-calorimetry. 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.

KW - Basic properties

KW - CO adsorption

KW - Catalysis

KW - IR spectroscopy

KW - Lewis acidity

KW - Microcalorimetry

KW - Sulfated zirconia

KW - Zirconia

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DO - 10.1023/a:1015332727610

M3 - Article

SN - 1022-5528

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EP - 269

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 3-4

ER -

Effect of sulfation on the acid-base properties of tetragonal zirconia. A calorimetric and IR spectroscopic study

Abstract

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