The influence of cation segregation on the methanol decomposition on nanostructured SnO2
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Data
2002-09-20
Autores
Carreno, NLV
Maciel, A. P.
Leite, E. R.
Lisboa Filho, Paulo Noronha [UNESP]
Longo, Elson [UNESP]
Valentini, A.
Probst, LFD
Paiva-Santos, C. O.
Schreiner, W. H.
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Editor
Elsevier B.V.
Resumo
Here we describe a new route to synthesize ultrafine rare earth doped and undoped tin oxide particles for catalytic applications. The catalytic behavior observed in SnO2 samples suggests the control of the catalytic activity and the selectivity of the products by the segregation of a layer of a rare earth compound with the increase of the heat-treatment temperature. The ultrafine particles were characterized by means of BET, XPS, TEM, XRD and Rietveld refinement. It was demonstrated that the effects of the dopant on the methanol decomposition reaction and on the H-2 selectivity were correlated with the segregation of a rare earth layer on the tin oxide samples. (C) 2002 Published by Elsevier B.V. B.V.
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Palavras-chave
nanostructured SnO2, methanol decomposition, influence of cation segregation
Como citar
Sensors and Actuators B-chemical. Lausanne: Elsevier B.V. Sa, v. 86, n. 2-3, p. 185-192, 2002.