Nanoscale Morphological and Structural Transformations of PtCu Alloy Electrocatalysts during Potentiodynamic Cycling

Journal article


Publication Details

Author(s): Khalakhan I, Waidhas F, Brummel O, Vorokhta M, Kus P, Yakovlev Y, Bertram M, Dopita M, Matolinova I, Libuda J, Matolin V
Journal: Journal of Physical Chemistry C
Publisher: AMER CHEMICAL SOC
Publication year: 2018
Volume: 122
Journal issue: 38
Pages range: 21974-21982
ISSN: 1932-7447


Abstract

PtCu bimetallic alloys are known to provide better activity than pure platinum in proton exchange membrane fuel cells. However, such catalysts undergo complex degradation processes during fuel cell operation, resulting in deterioration of their activity. By using in situ electrochemical (EC) atomic force microscopy combined with in situ EC infrared reflection absorption spectroscopy, we provide a comprehensive investigation of morphological and structural transformations of PtCu model thin film catalysts during accelerated degradation tests (ADTs). The ADTs consist of potentiodynamic cycling to three different upper potentials relevant for different modes of fuel cell operation. The results show that, depending on the upper potential limit, PtCu alloy electrocatalysts are subject to drastic changes in the surface composition, morphology, and structure.


FAU Authors / FAU Editors

Bertram, Manon
Lehrstuhl für Physikalische Chemie II
Brummel, Olaf Dr.
Lehrstuhl für Physikalische Chemie II
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie
Waidhas, Fabian
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions
Univerzita Karlova v Praze / Charles University in Prague


How to cite

APA:
Khalakhan, I., Waidhas, F., Brummel, O., Vorokhta, M., Kus, P., Yakovlev, Y.,... Matolin, V. (2018). Nanoscale Morphological and Structural Transformations of PtCu Alloy Electrocatalysts during Potentiodynamic Cycling. Journal of Physical Chemistry C, 122(38), 21974-21982. https://dx.doi.org/10.1021/acs.jpcc.8b06840

MLA:
Khalakhan, Ivan, et al. "Nanoscale Morphological and Structural Transformations of PtCu Alloy Electrocatalysts during Potentiodynamic Cycling." Journal of Physical Chemistry C 122.38 (2018): 21974-21982.

BibTeX: 

Last updated on 2019-21-02 at 09:08