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Electrochemical impedance spectroscopy of alkaline methanol oxidation

: Clees, Tanja; Nikitin, Igor; Nikitina, Lialia; Steffes-lai, Daniela; Pott, Sabine; Krewer, Ulrike; Windorfer, Theresa

International Academy, Research, and Industry Association -IARIA-:
Seventh International Conference on Advanced Communications and Computation, INFOCOMP 2017 : June 25 - 29, 2017, Venice, Italy
IARIA, 2017
ISBN: 978-1-61208-567-8
ISBN: 978-1-61208-073-4
International Conference on Advanced Communications and Computation (INFOCOMP) <7, 2017, Venice>
Fraunhofer SCAI ()
modeling of complex system; non-linear optimization; parameter identification; application; electrochemistry

Direct alkaline methanol fuel cell is a perspective technology for economic energy sources. The development of this technology requires advanced methods for the analysis of underlying chemical reactions. Electrochemical impedance spectroscopy is a popular method for analysis of dynamical processes in cells by a direct measurement of linear response function of the system to harmonic perturbations. In this paper, we propose a parameter identification procedure for electrochemical impedance spectroscopy of alkaline methanol oxidation. The procedure is based on decomposition of the linear response function in terms of poles and zeros and cross-fit of the obtained decomposition to the kinetic model using the methods of non-linear programming. The necessary conditions of the applicability of the proposed procedure have been derived and the stability of the method has been confirmed by the numerical experiments.