Influence of nitrogen content on zirconophosphate oxynitrides acid-base properties

被引：30

作者：

Fripiat, N

Conanec, R

Auroux, A

Laurent, Y

机构：

[1] INST RECH CATALYSE,CNRS,F-69626 VILLEURBANNE,FRANCE

[2] UNIV RENNES 1,F-35042 RENNES,FRANCE

来源：

JOURNAL OF CATALYSIS | 1997年 / 167卷 / 02期

关键词：

D O I：

10.1006/jcat.1997.1607

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：

A new family of phosphate oxynitrides was prepared by nitridation of an amorphous zirconophosphate precursor under ammonia flow. The oxygen substitution by nitrogen modified the acid-base properties of the zirconophosphate oxynitrides obtained. Surface acidity decreased sharply when bulk nitrogen content increased while basic properties as measured by SO2 adsorption calorimetry greatly depended on the O/N ratio. At 50 degrees C, the Knoevenagel condensation of benzaldehyde with malononitrile in toluene brings an 80% of conversion after 5 h. (C) 1997 Academic Press.

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收藏

页码：543 / 549

页数：7

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