Effect of ordering of PtCu₃ nanoparticle structure on the activity and stability for the oxygen reduction reaction.
In this study the performance enhancement effect of structural ordering for the oxygen reduction reaction (ORR) is systematically studied. Two samples of PtCu3 nanoparticles embedded on a graphitic carbon support are carefully prepared with identical initial composition, particle dispersion and size distribution, yet with different degrees of structural ordering. Thus we can eliminate all coinciding effects and unambiguously relate the improved activity of the ORR and more importantly the enhanced stability to the ordered nanostructure. Interestingly, the electrochemically induced morphological changes are common to both ordered and disordered samples. The observed effect could have a groundbreaking impact on the future directions in the rational design of active and stable platinum alloyed ORR catalysts.
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck Str. 1, 40237 Düsseldorf, Germany. hodnik@mpie.de mayrhofer@mpie.de.
Nejc
N
Hodnik
Chinnaiah
C
Jeyabharathi
Josef C
JC
Meier
Alexander
A
Kostka
Kanala L
KL
Phani
Aleksander
A
Rečnik
Marjan
M
Bele
Stanko
S
Hočevar
Miran
M
Gaberšček
Karl J J
KJ
Mayrhofer