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Study of voltage cycling conditions on Pt oxidation and dissolution in polymer electrolyte fuel cells Full article

Journal Journal of Power Sources
ISSN: 0378-7753
Output data Year: 2021, Volume: 493, Article number : 229693, Pages count : DOI: 10.1016/j.jpowsour.2021.229693
Tags Butler–Volmer reaction rate; Platinum dissolution; Platinum surface blockage; Polymer-electrolyte fuel cell; Potential cycling; Reaction–diffusion
Authors Kovtunenko V.A. 1,2 , Karpenko-Jereb L. 3
Affiliations
1 Lavrentyev Institute of Hydrodynamics, Siberian Division of the Russian Academy of Sciences
2 Institute for Mathematics and Scientific Computing, Karl-Franzens University of Graz
3 Institute of Electronic Sensor Systems, Graz University of Technology

Abstract: This paper is devoted to study the electrochemical behavior of Pt catalyst in a polymer electrolyte fuel cell at various operating conditions and at different electric potential difference (also known as voltage) cycling applied in accelerated stress tests. The degradation of platinum is considered with respect to the Pt dissolution and the Pt oxide coverage of catalyst described by a one-dimensional model. In the model, degradation rate increases with temperature and decreasing particle diameter of Pt nano-particles. The theoretical study of the underlying diffusion system with the nonlinear reactions is presented by analytical methods and gives explicit solutions through a first integral of the ODE system. Numerical tests are obtained using a second order implicit–explicit scheme. The computer simulation shows that the lifetime of the catalyst depends on the voltage profile and the upper potential level. By this Pt mass loss is more significant at the membrane surface than at the gas diffusion layer.
Cite: Kovtunenko V.A. , Karpenko-Jereb L.
Study of voltage cycling conditions on Pt oxidation and dissolution in polymer electrolyte fuel cells
Journal of Power Sources. 2021. V.493. 229693 . DOI: 10.1016/j.jpowsour.2021.229693 WOS Scopus РИНЦ OpenAlex
Identifiers:
Web of science: WOS:000637753900003
Scopus: 2-s2.0-85101985830
Elibrary: 46761893
OpenAlex: W3133797032
Citing:
DB Citing
Scopus 13
OpenAlex 13
Elibrary 10
Web of science 13
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