Fuel Cell Measurements with Cathode Catalysts of Sputtered Pt3Y Thin Films
Artikel i vetenskaplig tidskrift, 2018

Fuel cells are foreseen to have an important role in sustainable energy systems, provided that catalysts with higher activity and stability are developed. In this study, highly active sputtered thin films of platinum alloyed with yttrium (Pt 3 Y) are deposited on commercial gas diffusion layers and their performance in a proton exchange membrane fuel cell is measured. After acid pretreatment, the alloy is found to have up to 2.5 times higher specific activity than pure platinum. The performance of Pt 3 Y is much higher than that of pure Pt, even if all of the alloying element was leached out from parts of the thin metal film on the porous support. This indicates that an even higher performance is expected if the structure of the Pt 3 Y catalyst or the support could be further improved. The results show that platinum alloyed with rare earth metals can be used as highly active cathode catalyst materials, and significantly reduce the amount of platinum needed, in real fuel cells.

electrocatalysis

thin films

fuel cells

rare earths

platinum

Författare

Niklas Lindahl

Chalmers, Fysik, Kondenserade materiens fysik

Björn Eriksson

Kungliga Tekniska Högskolan (KTH)

Henrik Grönbeck

Chalmers, Fysik, Kemisk fysik

R. W. Lindstrom

Kungliga Tekniska Högskolan (KTH)

Göran Lindbergh

Kungliga Tekniska Högskolan (KTH)

C. Lagergren

Kungliga Tekniska Högskolan (KTH)

Björn Wickman

Chalmers, Fysik, Kemisk fysik

ChemSusChem

1864-5631 (ISSN) 1864-564X (eISSN)

Vol. 11 1438-1445

Ämneskategorier

Kemiska processer

Annan kemiteknik

Annan kemi

DOI

10.1002/cssc.201800023