Characterization of Pt-​based catalyst materials by voltammetric techniques

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)

Interna författare/redaktörer

Publikationens författare: Koponen U, Kumpulainen H, Bergelin M, Keskinen J, Peltonen T, Valkiainen M, Wasberg M
Publiceringsår: 2003
Tidskrift: Journal of Power Sources
Tidskriftsakronym: JPS
Volym: 118
Nummer: 1-2
Artikelns första sida, sidnummer: 325
Artikelns sista sida, sidnummer: 333
ISSN: 0378-7753
eISSN: 1873-2755


Catalyst materials in inks, in half-​MEAs and in a polymer electrolyte membrane (PEM) fuel cell were characterized by cyclic voltammetry. Lab.-​made Pt inks were modified with Ru, Os and Ru+Ir and the MeOH oxidn. activity of the created surfaces was tested. A novel electrode, which enables the study of the O redn. reaction on the cathode was introduced. With this measuring device it was possible to vary the O content on the ink side and the p activity of the electrolyte on the membrane side of a half-​MEA. Catalyst layers based on Pt, Pt-​Ru and Pt-​Co inside a PEM-​unit cell were also characterized in situ by cyclic voltammetry. The active surface areas are linearly dependent on the Pt mass d. in the catalyst layers. Approx. 30​% of the Pt loading in the MEA was electroactive.

Senast uppdaterad 2020-27-09 vid 02:37