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

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...

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Bibliographic Details
Published in:Materials letters 2008-04, Vol.62 (10-11), p.1677-1680
Main Authors: Weber, Ingrid T., Valentini, Antoninho, Probst, Luiz Fernando D., Longo, Elson, Leite, Edson R.
Format: Article
Language:English
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Summary: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 (5mol%). 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 deg C.
ISSN:0167-577X
DOI:10.1016/j.matlet.2007.09.058