Journal of Advances in Nanomaterials

Download PDF (665.8 KB) PP. 97 - 104 Pub. Date: April 19, 2017

DOI: 10.22606/jan.2017.22002

• J.Vilana, M. Montiel
  Ge-CPN, Departament de Ciència de Materials i Química Física and Institut de Nanociència i Nanotecnologia (IN2UB). C/Martí i Franquès, 1-11, 08028 Barcelona, Spain
• N. Gimeno
  
  Ge-CPN, Departament de Ciència de Materials i Química Física and Institut de Nanociència i Nanotecnologia (IN2UB). C/Martí i Franquès, 1-11, 08028 Barcelona, Spain
• E. Gómez
  
  Ge-CPN, Departament de Ciència de Materials i Química Física and Institut de Nanociència i Nanotecnologia (IN2UB). C/Martí i Franquès, 1-11, 08028 Barcelona, Spain
• E. Vallés^*
  
  Ge-CPN, Departament de Ciència de Materials i Química Física and Institut de Nanociència i Nanotecnologia (IN2UB). C/Martí i Franquès, 1-11, 08028 Barcelona, Spain

Pt-Co thin films have been prepared by means of electrodeposition method, due to the interest of this alloy as catalyst in acid fuel cells. As the stability of the catalyst is fundamental to consider its applicability, the behavior of the films as a function of the composition during voltammetry activation in acidic medium has been studied. The Pt₃Co films show high stability, maintaining their morphology, X-ray diffraction profile, composition and high surface area, and show good catalytic behaviour for methanol electro-oxidation in acidic medium. However, the Pt_0.7≤x≤1Co films present low stability and evolve during the test to flatter films of lower effective area and Pt₃Co stoichiometry, by losing cobalt. Only Pt-Co electrodeposited films of defined compositions show the enough stability and properties to be used as good materials for electro-oxidation processes in acidic media.

PtCo films, electrodeposition, catalyst for acid fuel cells, voltammetry, electro-oxidation processes.

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