Size-selected platinum clusters as electrocatalysts for the oxygen reduction reaction

TY - GEN

T1 - Size-selected platinum clusters as electrocatalysts for the oxygen reduction reaction

AU - Nesselberger, Markus

AU - Kunz, Sebastian

AU - Schweinberger, Florian

AU - Hartl, Katrin Gabriele

AU - Mayrhofer, Karl

AU - Heiz, Ueli

AU - Arenz, Matthias

PY - 2013

Y1 - 2013

N2 - In the present study size-selected platinum clusters fabricated by a laser ablation source are investigated with respect to the oxygen reduction reaction. Pt46 Clusters were deposited onto planar carbon surfaces leading to different cluster coverages between 0.018 clusters / nm2 and 0.115 clusters / nm2. In all cases the coverage on the glassy carbon support was low enough to avoid cluster agglomeration and hence probe the activity of isolated Pt46 clusters. The result shows that the specific ORR activity of the Pt46 clusters, i.e. the reaction rate normalized with respect to the electrochemical active surface area, depends on the cluster coverage and increases with higher coverage.

AB - In the present study size-selected platinum clusters fabricated by a laser ablation source are investigated with respect to the oxygen reduction reaction. Pt46 Clusters were deposited onto planar carbon surfaces leading to different cluster coverages between 0.018 clusters / nm2 and 0.115 clusters / nm2. In all cases the coverage on the glassy carbon support was low enough to avoid cluster agglomeration and hence probe the activity of isolated Pt46 clusters. The result shows that the specific ORR activity of the Pt46 clusters, i.e. the reaction rate normalized with respect to the electrochemical active surface area, depends on the cluster coverage and increases with higher coverage.

U2 - 10.1149/05002.1333ecst

DO - 10.1149/05002.1333ecst

M3 - Conference article

SN - 1938-6737

VL - 50

SP - 1333

EP - 1338

JO - ECS Transactions

JF - ECS Transactions

IS - 2

ER -