THE INFLUENCE OF WATER ON THE REDUCTION AND REOXIDATION OF CERIA

被引：120

作者：

PADESTE, C ^{[1
]}

CANT, NW ^{[1
]}

TRIMM, DL ^{[1
]}

机构：

[1] MACQUARIE UNIV,SCH CHEM,N RYDE,NSW 2109,AUSTRALIA

来源：

CATALYSIS LETTERS | 1993年 / 18卷 / 03期

关键词：

CERIA REDUCTION; OXYGEN STORAGE CAPACITY; CO-TPR; XPS; TEM;

D O I：

10.1007/BF00769451

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：

Two different samples of ceria have been characterized by temperature programmed reduction in carbon monoxide (CO-TPR), surface area determination and transmission electron microscopy (TEM). The much higher reducibility at temperatures below 550-degrees-C of a sample prepared by decomposition of cerium carbonate, compared to a commercial ceria, was attributed to the much lower crystallinity. When this ceria, in the partly reduced state, was brought in contact with water vapour, it was readily reoxidised with evolution of hydrogen. The oxygen storage capacity of this sample, determined in cycling experiments, was considerably lowered by the presence of water.

引用

页码：305 / 316

页数：12

共 14 条

[1] UBER DIE OXYDE DES CERS .4. DIE SAUERSTOFFZERSETZUNGDRUCKE IM SYSTEM DER CEROXYDE [J].