Otro
The influence of cation segregation on the methanol decomposition on nanostructured SnO2
Registro en:
Sensors and Actuators B-chemical. Lausanne: Elsevier B.V. Sa, v. 86, n. 2-3, p. 185-192, 2002.
0925-4005
10.1016/S0925-4005(02)00169-7
WOS:000178977500012
Autor
Carreno, NLV
Maciel, A. P.
Leite, E. R.
Lisboa Filho, Paulo Noronha
Longo, Elson
Valentini, A.
Probst, LFD
Paiva-Santos, C. O.
Schreiner, W. H.
Resumen
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.