Author/Authors :
Carreٌo، نويسنده , , N.L.V and Maciel، نويسنده , , A.P and Leite، نويسنده , , E.R and Lisboa-Filho، نويسنده , , P.N and Longo، نويسنده , , E and Valentini، نويسنده , , A and Probst، نويسنده , , L.F.D and Paiva-Santos، نويسنده , , C.O and Schreiner، نويسنده , , W.H، نويسنده ,
Abstract :
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 H2 selectivity were correlated with the segregation of a rare earth layer on the tin oxide samples.
