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Electrochemical reduction of NO and O2 on La2−x Sr x CuO4-based electrodes

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Abstract

A series of La2 − x Sr x CuO4 (x = 0.0, 0.05, 0.15, 0.25 and 0.35) compounds was investigated for the use of direct electrochemical reduction of NO in an all-solid-state electrochemical cell. The materials were investigated using cyclic voltammetry in 1% NO in Ar and 10% O2 in Ar. The most selective electrode material was La2CuO4, which had an activity of NO reduction that was 6.8 times higher than that of O2 at 400 °C. With increasing temperature, activity increased while selectivity decreased. Additionally, conductivity measurements were carried out, and the materials show metallic conductivity behavior which follows an adiabatic small polaron hopping mechanism.

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Acknowledgements

We would like to thank the staff at the Fuel Cells and Solid State Chemistry Department, Risø National Laboratory, especially Dr. M. Mogensen and Dr. Martin Søgaard for many fruitful discussions and help in the lab.

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Authors and Affiliations

  1. Fuel Cells and Solid State Chemistry Department, National Laboratory for Sustainable Energy, Technical University of Denmark, Frederiksborgvej 399 - building 227, 4000, Roskilde, Denmark

    Vibe L. E. Simonsen, Linda Nørskov & Kent Kammer Hansen

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  1. Vibe L. E. Simonsen
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  2. Linda Nørskov
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  3. Kent Kammer Hansen
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Correspondence to Vibe L. E. Simonsen.

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Simonsen, V.L.E., Nørskov, L. & Hansen, K.K. Electrochemical reduction of NO and O2 on La2−x Sr x CuO4-based electrodes. J Solid State Electrochem 12, 1573–1577 (2008). https://doi.org/10.1007/s10008-008-0514-6

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  • DOI: https://doi.org/10.1007/s10008-008-0514-6

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