
Preparation and characterization of Pt–Rare Earth/C electrocatalysts using an alcohol reduction process for methanol electro-oxidation
2008; Elsevier BV; Volume: 476; Issue: 1-2 Linguagem: Inglês
10.1016/j.jallcom.2008.08.073
ISSN1873-4669
AutoresAlmir Oliveira Neto, André Y. Watanabe, Michele Brandalise, Marcelo Marques Tusi, Rita M. de S. Rodrigues, Marcelo Linardi, Estevam V. Spinacé, Christina A.L.G.O. Forbicini,
Tópico(s)Fuel Cells and Related Materials
ResumoPt–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.
Referência(s)