BRONSTED ACIDITY OF A SUPERACID SULFATE-DOPED ZRO2 SYSTEM

被引：108

作者：

MORTERRA, C ^{[1
]}

CERRATO, G ^{[1
]}

PINNA, F ^{[1
]}

SIGNORETTO, M ^{[1
]}

机构：

[1] UNIV VENICE,DEPT CHEM,I-30123 VENICE,ITALY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 47期

关键词：

D O I：

10.1021/j100098a036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The dehydration and rehydration of a catalytically active (superacid) sulfate-doped ZrO2 system has been studied by IR spectroscopy. By the adsorption of pyridine, the acidity of the system has been tested in various stages of the dehydration/rehydration process. Bronsted acid centers are abundantly present and are in different hydration states after dehydration at temperatures in the 300-473 K interval. For dehydration at T greater than or equal to 473 (but not higher than approximate to 900 K), declining amounts of acid protonic centers are still present and are in an anhydrous form; the original Bronsted acidity can be regenerated upon rehydration at ambient temperature.

引用

页码：12373 / 12381

页数：9