On the Activity and Stability of Sr3NiPtO6 and Sr3CuPtO6 as Electrocatalysts for the Oxygen Reduction Reaction in a Polymer Electrolyte Fuel Cell
Artikel i vetenskaplig tidskrift, 2007

Sr3NiPtO6 and Sr3CUPtO6 were evaluated as low-platinum alternative oxygen reduction catalysts in a solid polymer electrolyte fuel cell at 80 degrees C. The oxides were synthesised using a new method based on an organometallic precursor route. The electrochemical evaluation showed similar oxygen reduction performance for Sr3NiPtO6 and Sr3CUPtO6, with a slightly higher activity for Sr3NiPtO6. In comparison with the oxides, the oxygen reduction activity for a commercial Pt/C catalyst was approximately 10 times higher. XRD analysis of the used electrodes revealed that the oxides were not stable in the PEMFC environment, and converted into platinum during operation. Elemental analysis of the used electrodes also showed a difference in platinum formation, where the platinum content on the surface of the electrode facing the gas diffusion layer was several times higher for Sr3NiPtO6 than Sr3CUPtO6. This indicates that the Sr3NiPtO6 electrode may be more susceptible to platinum migration.

Författare

Per Kjellin

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Henrik Ekström

The Royal Institute of Technology (KTH)

Göran Lindbergh

The Royal Institute of Technology (KTH)

Anders Palmqvist

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Journal of Power Sources

0378-7753 (ISSN)

Vol. 168 346-350

Ämneskategorier

Materialteknik

Kemiteknik

Annan naturresursteknik

Kemi

DOI

10.1016/j.jpowsour.2007.02.051