Catalytic activity of nanometric pure and rare earth-doped SnO2 samples

被引：29

作者：

Weber, Ingrid T.

Valentini, Antoninho ^{[1
]}

Probst, Luiz Fernando D. ^{[1
]}

Longo, Elson ^{[2
]}

Leite, Edson R. ^{[2
]}

机构：

[1] Univ Fed Santa Catarina, Dept Chem, Labcath, BR-88040900 Florianopolis, SC, Brazil

[2] Univ Fed Sao Carlos, Dept Chem, CMDMC LIEC, BR-13565905 Sao Carlos, SP, Brazil

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 10-11期

基金：

巴西圣保罗研究基金会;

关键词：

rare earth-doped SnO2; nanomaterials; methanol oxidation; catalysts;

D O I：

10.1016/j.matlet.2007.09.058

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper describes aspects of the catalytic properties of nanometric pure and rare earth (RE= La or Ce)-doped SnO2 powders, synthesized by a chemical route known as the modified polymeric precursor route (MPPR). Methanol oxidation was chosen as the probe reaction. It was verified that using up to 1 mol% of dopant no detectable influence was found, however changes in the reaction profile were observed with higher concentrations (5 mol%). The nature of dopant was also found to play an important role in the route of the reaction. Ce-doped samples exhibited high methanol conversion even at low temperatures. On the other hand, La-doped samples seem to have a delayed reaction, exhibiting significant conversion only at temperatures higher than 350 degrees C. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1677 / 1680

页数：4

共 18 条

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