Dissolution and redeposition on Pt nanoparticles under electrochemical conditions
Journal article, 2011

We present a Schottky-type model describing Pt2+ dissolution and redeposition on Pt nanoparticles in polymer electrolyte fuel cells. The charge transfer is considered to occur near the surface of nanoparticles so that the potential barrier for the reaction is formed by the double-layer potential and the image interaction. With increasing electrode potential, the transfer coefficient for dissolution is found to decrease from 0.6-0.7 down to 0.3-0.4. Its dependence on the effective dielectric constant of the double layer is appreciable while the dependence on the particle size is weak. (C) 2011 Elsevier B.V. All rights reserved.

quartz-crystal microbalance

fuel-cells

platinum dissolution

degradation

catalyst

pt(111)

kinetics

dynamic mechanistic model

electrolyte

polymer electrolyte

reduction

Author

Vladimir Zhdanov

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

Bengt Herbert Kasemo

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

Chemical Physics Letters

0009-2614 (ISSN)

Vol. 509 4-6 134-137

Subject Categories

Chemical Sciences

DOI

10.1016/j.cplett.2011.04.075

More information

Created

10/8/2017