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Ternary Fe- or Mo-Au-Ni/GDC as Candidate Fuel Electrodes for the Internal Dry Reforming of CH 4 : Physicochemical and Kinetic Investigation

Author

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  • Evangelia Ioannidou

    (Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas (FORTH/ICE-HT), GR-26504 Patras, Greece)

  • Stylianos G. Neophytides

    (Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas (FORTH/ICE-HT), GR-26504 Patras, Greece)

  • Dimitrios K. Niakolas

    (Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas (FORTH/ICE-HT), GR-26504 Patras, Greece
    Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece)

Abstract

The present study deals with the physicochemical and catalytic/kinetic investigation of Fe, Au, Fe-Au, and Mo-Au modified Ni/GDC electrocatalysts towards their performance for the DRM, RWGS, and CH 4 decomposition reactions. For this purpose, Au-NiO/GDC (where Au = 1 or 3 wt.%), Fe-NiO/GDC (where Fe = 0.5 or 2 wt.%), 0.5Fe-3Au-NiO/GDC, and 0.4Mo-3Au-NiO/GDC were synthesized via deposition (co-) precipitation. There is discussion on the structural properties of the electrocatalysts on the oxidized and reduced state, as well as their use as electrolyte-supported (half) cells. A key remark after H 2 -reduction is the formation of binary or ternary solid solutions. Ni/GDC was the most active for the catalytic CO 2 reforming of CH 4 and the CH 4 decomposition reactions and as a result the most prone to carbon deposition. On the other hand, the modified 3Au-Ni/GDC, 0.5Fe-3Au-Ni/GDC, and 0.4Mo-3Au-Ni/GDC exhibited the following properties: (i) the highest E a,app for the non-desired RWGS reaction, (ii) high tolerance to carbon formation due to lower activity for the CH 4 decomposition, and (iii) were also less active for H 2 and CO production. Finally, 0.4Mo-3Au-Ni/GDC seems to perform the DRM reaction through a different mechanism when compared to Ni/GDC. Overall, the above three samples are proposed as potential fuel electrodes for further electrocatalytic measurements for the SOFC internal DRM process.

Suggested Citation

  • Evangelia Ioannidou & Stylianos G. Neophytides & Dimitrios K. Niakolas, 2023. "Ternary Fe- or Mo-Au-Ni/GDC as Candidate Fuel Electrodes for the Internal Dry Reforming of CH 4 : Physicochemical and Kinetic Investigation," Energies, MDPI, vol. 17(1), pages 1-23, December.
    • Handle: RePEc:gam:jeners:v:17:y:2023:i:1:p:184-:d:1309549
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    References listed on IDEAS

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    1. Liu, Ming & van der Kleij, A. & Verkooijen, A.H.M. & Aravind, P.V., 2013. "An experimental study of the interaction between tar and SOFCs with Ni/GDC anodes," Applied Energy, Elsevier, vol. 108(C), pages 149-157.
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