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NEMCA effect: why are the work function changes of the gas exposed catalyst-electrode surface one-to-one related to the changes in the catalyst working electrode potential?

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Abstract

In the present work, an important point concerning the NEMCA effect is addressed. We analyse the reasons why the changes in the work function Φ of the gas exposed catalyst-electrode surface are one to one related to the changes in the catalyst working electrode potential E with respect to a reference electrode. It is concluded that this is due to the unique properties of the catalyst/solid electrolyte interface: the structure of the double layer in this region is very different from that in liquid electrolytes, being the potential difference at this interface mainly determined by the specific adsorption of the mobile species in the solid electrolyte.

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Notes

  1. This assumption on the composition of this solid electrolyte is made for concrete discussion purposes. A similar analysis could be made for example with Y203-stabilized ZrO2, replacing Na + by O2– as conducting ion.

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Acknowledgements

We thank CONICET, Agencia Cordoba Ciencia, Secyt UNC and Program BID 1201/OC-AR PICT No 06-04505 for financial support. Language assistance by Karina Plasencia is gratefully acknowledged.

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Authors and Affiliations

  1. Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, 5000, Córdoba, Argentina

    Ezequiel P. M. Leiva

  2. Atomistic Simulation Group, School of Mathematics and Physics, Queen's University Belfast, Belfast, Northern Ireland, BT7 1NN, United Kingdom

    C. G. Sánchez

Authors
  1. Ezequiel P. M. Leiva
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  2. C. G. Sánchez
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Correspondence to Ezequiel P. M. Leiva.

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Dedicated to Prof. Wolf Vielstich on the occasion of his 80th birthday in recognition of his numerous contributions to interfacial electrochemistry

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Leiva, E.P.M., Sánchez, C.G. NEMCA effect: why are the work function changes of the gas exposed catalyst-electrode surface one-to-one related to the changes in the catalyst working electrode potential?. J Solid State Electrochem 7, 588–592 (2003). https://doi.org/10.1007/s10008-003-0417-5

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