Preparation and characterization of Pt-rare earth/C electrocatalysts using and alcohol reduction process for methanol electro-oxidation
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Journal of Alloys and Compounds
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Pt-Rare Earth/C electrocatalysts (Rare Earth = La, Ce, Pr, Nd, Sm, Tb, Dy, Ho and Er) were prepared by an alcohol reduction process using ethylene glycol as reduction agent and solvent and Vulcan XC72 as support. The electrocatalysts were characterized by energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electro-oxidation of methanol was studied in acid medium by cyclic voltammetry and chronoamperometry using thin porous coating technique. The XRD patterns indicate that all electrocatalysts present the face-centered cubic (fcc) structure of Pt and the presence of Rare Earth hydroxides. PtEr/C, PtTb/C, PtLa/C, PtDy/C and PtNd/C electrocatalysts prepared by this methodology showed superior performance for methanol electro-oxidation at room temperature compared to Pt/C.
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OLIVEIRA NETO, ALMIR; WATANABE, ANDRE Y.; BRANDALISE, MICHELE; TUSI, MARCELO M.; RODRIGUES, RITA M. de S.; LINARDI, MARCELO; SPINACE, ESTEVAM V.; FORBICINI, CHRISTINA A.L.G.O. Preparation and characterization of Pt-rare earth/C electrocatalysts using and alcohol reduction process for methanol electro-oxidation. Journal of Alloys and Compounds, v. 476, n. 1-2, p. 288-291, 2009. DOI: 10.1016/j.jallcom.2008.08.073. Disponível em: http://repositorio.ipen.br/handle/123456789/4852. Acesso em: 30 Dec 2025.
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