期刊
MATERIALS LETTERS
卷 62, 期 10-11, 页码 1677-1680出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2007.09.058
关键词
rare earth-doped SnO2; nanomaterials; methanol oxidation; catalysts
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.
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