Preparation and characterization of Pt-Rare Earth/C electrocatalysts using an alcohol reduction process for methanol electro-oxidation

作者：Neto Almir Oliveira^*; Watanabe Andre Y; Brandalise Michele; Tusi Marcelo M; Rodrigues Rita M de S; Linardi Marcelo; Spinace Estevam V; Forbicini Christina A L G O

来源：Journal of Alloys and Compounds, 2009, 476(1-2): 288-291.

DOI：10.1016/j.jallcom.2008.08.073

• Pt-Rare Earth/C
• Alcohol reduction process
• Methanol oxidation
• Fuel cell

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.

• 出版日期2009-5-12