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Article Dans Une Revue Thin Solid Films Année : 2012

Activity of PtSnRh/C nanoparticles for the electrooxidation of C1 and C2 alcohols

Résumé

A systematic investigation of alcohol adsorption and oxidation on binary and ternary electrocatalysts in acid medium was performed. Binary (PtRh) and ternary (PtRhSn) were prepared by the Pechini modified method on carbon Vulcan XC-72, and different nominal compositions were characterized by energy dispersive X-ray and X-ray diffraction (XRD) techniques. The XRD results showed that the Pt80Rh20/C and Pt70Sn10Rh20/C electrocatalysts consisted of the Pt displaced phase, suggesting the formation of a solid solution between the metals Pt/Rh and Pt/Sn. Electrochemical investigations on these different electrode materials were carried out as a function of the electrocatalyst composition, in acidmedium(0.5 mol dm(-3) H2SO4), and in the absence and presence of different alcohols (methanol, ethanol and ethylene glycol). The electrochemical results obtained at room temperature have shown that the Pt70Sn10Rh20/C catalyst display better catalytic activity for alcohol oxidation compared with the binary catalyst.

Dates et versions

hal-00819274 , version 1 (30-04-2013)

Identifiants

Citer

F. E. Teran, D.M. Santos, J. Ribeiro, K.B. Kokoh. Activity of PtSnRh/C nanoparticles for the electrooxidation of C1 and C2 alcohols. Thin Solid Films, 2012, 520 (18), pp.5846-5850. ⟨10.1016/j.tsf.2012.05.022⟩. ⟨hal-00819274⟩
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