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High surface area LaNiO3 electrodes for oxygen electrocatalysis in alkaline media

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Abstract

LaNiO3 coatings on nickel-foam supports were prepared by brush painting. The electrochemical properties were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Comparative studies were performed with LaNiO3-pelleted electrodes. The roughness factors were determined by CV and found to be 5,208 ± 350 and 4,037 ± 250 for the pelleted and coated electrodes, respectively. EIS measurements confirm the results obtained by CV. Values lower than 0.3 were calculated for the morphology factors for both electrodes, indicating low electrochemical porosity. The experimental method used in this work to synthesise the oxide coupled with the use of Ni foam as support has proved to be very effective in producing oxide electrodes with surface areas higher than those referred to in relevant literature.

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Acknowledgments

This work was partially financed by Fundação para a Ciência e Tecnologia (FCT), under contract no. PTDC/CTM/102545/2008. C.O. Soares acknowledged a grant from FCT under the same contract.

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Authors and Affiliations

  1. Departamento de Química e Bioquímica, C.C.M.M., Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal

    C. O. Soares, M. D. Carvalho, M. E. Melo Jorge, A. Gomes & M. I. da Silva Pereira

  2. Fuel Cells and Hydrogen Unit, Laboratório Nacional de Energia e Geologia, Paço do Lumiar 22, 1649-038, Lisbon, Portugal

    R. A. Silva & C. M. Rangel

Authors
  1. C. O. Soares
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  2. M. D. Carvalho
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  3. M. E. Melo Jorge
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  4. A. Gomes
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  5. R. A. Silva
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  6. C. M. Rangel
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  7. M. I. da Silva Pereira
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Correspondence to M. I. da Silva Pereira.

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Soares, C.O., Carvalho, M.D., Melo Jorge, M.E. et al. High surface area LaNiO3 electrodes for oxygen electrocatalysis in alkaline media. J Appl Electrochem 42, 325–332 (2012). https://doi.org/10.1007/s10800-012-0399-z

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  • DOI: https://doi.org/10.1007/s10800-012-0399-z

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