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Classical, phenomenological analysis of the kinetics of reactions at the gas-exposed surface of mixed ionic electronic conductors

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Abstract

The kinetics of reactions occurring at the gas-exposed surfaces of charged mixed ionic electronic conductors (MIECs) are examined from theoretical first principles. Analysis based on the classical electrochemical potential-transition state theory model reveals that the nature of the reactions is electrochemical in general. However, the influence of the surface potential on the reaction rate is opposite for adsorption and incorporation reactions. Two-dimensional finite volume models of an MIEC as working electrode in a half-cell configuration are presented. The results for a simple, two-step reduction process show that the effect of the surface potential on the rate of reactions is minimal for incorporation-limited reactions but more influential for adsorption-limited reactions.

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Acknowledgements

This work was supported by the U. S. Department of Energy, the National Energy Technology Laboratory, through the SECA Core Technology Program (Grant No. DE-FC26-02NT41572). Additional support for David Mebane is provided by The Boeing Company, through a Boeing Fellowship.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA

    David S. Mebane & Meilin Liu

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  1. David S. Mebane
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  2. Meilin Liu
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Correspondence to Meilin Liu.

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An erratum to this article is available at http://dx.doi.org/10.1007/s10008-006-0165-4.

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Mebane, D.S., Liu, M. Classical, phenomenological analysis of the kinetics of reactions at the gas-exposed surface of mixed ionic electronic conductors. J Solid State Electrochem 10, 575–580 (2006). https://doi.org/10.1007/s10008-006-0144-9

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  • DOI: https://doi.org/10.1007/s10008-006-0144-9

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