1. Preparation and characterization of Pt–Rare Earth/C electrocatalysts using an alcohol reduction process for methanol electro-oxidation
- Author
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Neto, Almir Oliveira, Watanabe, André Y., Brandalise, Michele, Tusi, Marcelo M., de S. Rodrigues, Rita M., Linardi, Marcelo, Spinacé, Estevam V., and Forbicini, Christina A.L.G.O.
- Subjects
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PLATINUM catalysts , *ELECTROLYTIC reduction , *ELECTROCATALYSIS , *ELECTROLYTIC oxidation , *METHANOL , *X-ray spectroscopy , *RARE earth oxides , *X-ray diffraction - Abstract
Abstract: 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. [Copyright &y& Elsevier]
- Published
- 2009
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