Improve the catalytic property of La$ {0.6}$Sr$ {0.4}$Co$ {0.2}$Fe$ {0.8}$O$ {3}$-Ce$ {0.9}$Gd$ {0.1}$O$ {2}$ LSCF-CGO cathodes with CuO nanoparticles infiltrationReportar como inadecuado


Improve the catalytic property of La$ {0.6}$Sr$ {0.4}$Co$ {0.2}$Fe$ {0.8}$O$ {3}$-Ce$ {0.9}$Gd$ {0.1}$O$ {2}$ LSCF-CGO cathodes with CuO nanoparticles infiltration


Improve the catalytic property of La$ {0.6}$Sr$ {0.4}$Co$ {0.2}$Fe$ {0.8}$O$ {3}$-Ce$ {0.9}$Gd$ {0.1}$O$ {2}$ LSCF-CGO cathodes with CuO nanoparticles infiltration - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Publication Date: 2017-08-20

Journal Title: Electrochimica Acta

Volume: 246

Pages: 148-155

Type: Article

This Version: VoR

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Citation: Gao, C., Liu, Y., Xi, K., Jiao, S., Tomov, R. I., & Kumar, R. V. (2017). Improve the catalytic property of La$_{0.6}$Sr$_{0.4}$Co$_{0.2}$Fe$_{0.8}$O$_{3}$/Ce$_{0.9}$Gd$_{0.1}$O$_{2}$ (LSCF/CGO) cathodes with CuO nanoparticles infiltration. Electrochimica Acta, 246 148-155. https://doi.org/10.1016/j.electacta.2017.05.138

Abstract: LSCF/CGO composite cathodes decorated with small amount (less than 1 wt%) of nano CuO particles has been synthesized by infiltration technique. The area specific resistance (ASR) of the LSCF/CGO at 500 °C has been significantly reduced by the CuO infiltration from 15.5 Ω cm 2 and 0.62 Ω cm 2 to 3.9 Ω cm 2 and 0.32 Ω cm 2 at 500 °C and 650 °C respectively. The redox reaction of Cu 2+ /Cu 1+ at the interface of CuO and LSCF/CGO has been assigned as the main reason for the improvement. Lattice parameter change of LSCF at 500 °C has been detected by High Temperature XRD, indicating partial diffusion of Cu 2+ into the lattice of LSCF, and formation of a new Cu containing compound. The performance stability of the infiltrated samples has been investigated by aging at 500 °C and 650 °C for 150 hours in stagnant air. A slight degradation of the catalytic property was observed during the aging process. The degradation may be attributed to three factors: (i) the coarsening of CuO nanoparticles, (ii) segregation of the SrO due the lattice change and (iii) instability of the new Cu 2+ contained compounds.

Keywords: infiltration, solid oxide fuel cell, CuO, degradation

Sponsorship: The authors wish to acknowledge EPSRC grant “Tailoring of microstructural evolution in impregnated SOFC electrodes” for the financial support.

Identifiers:

External DOI: https://doi.org/10.1016/j.electacta.2017.05.138

This record's URL: https://www.repository.cam.ac.uk/handle/1810/267034



Rights: Attribution 4.0 International

Licence URL: http://creativecommons.org/licenses/by/4.0/





Autor: Gao, CLiu, YingjunXi, KJiao, STomov, Rumen IvanovKumar, Ramachandran Vasant

Fuente: https://www.repository.cam.ac.uk/handle/1810/267034



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