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Synthesis and Evaluation of Highly Tolerant Pd Electrocatalysts as Cathodes in Direct Ethylene Glycol Fuel Cells (DEGFC)

Author

Listed:
  • F. Javier Rodríguez Varela

    (Grupo de Recursos Naturales y Energéticos, Cinvestav Unidad Saltillo, Carr. Saltillo-Monterrey Km. 13.5, Ramos Arizpe, Coahuila, C.P. 25900, Mexico)

  • Sergio Fraire Luna

    (Grupo de Recursos Naturales y Energéticos, Cinvestav Unidad Saltillo, Carr. Saltillo-Monterrey Km. 13.5, Ramos Arizpe, Coahuila, C.P. 25900, Mexico)

  • Oumarou Savadogo

    (Laboratoire d'Électrochimie et de Matériaux Énergétiques, École Polytechnique de Montréal, C.P. 6079, succ. Centre-Ville, Montréal, QC, H3C 3A7, Canada)

Abstract

Highly selective Pd electrocatalysts were synthesized by the formic acid (FA) method and evaluated as cathodes for DEGFC applications. In rotating disc measurements in acid medium, the Pd/C cathode showed important catalytic activity for the Oxygen Reduction Reaction (ORR). In the presence of ethylene glycol (EG, C 2 H 6 O 2 ), Pd/C exhibited a noteworthy electrochemical behavior and full tolerance to the organic molecule. No current density peaks associated to the EG oxidation reaction emerged and the shift in onset potential for the ORR ( E onset ) toward more negative potentials was negligible on this cathode. As a comparison, commercial Pt/C was tested under the same conditions showing a poor selectivity for the ORR when EG was present. The detrimental effect of EG on the Pt electrocatalysts resulted in high intensity current density peaks due to the oxidation of EG and a significant shift in E onset . The evaluation of Pd/C in a DEGFC operating at 80 °C demonstrated its good performance as cathode material. Given these results, it is expected that highly efficient Pd-based cathodes can find application in DEGFCs.

Suggested Citation

  • F. Javier Rodríguez Varela & Sergio Fraire Luna & Oumarou Savadogo, 2009. "Synthesis and Evaluation of Highly Tolerant Pd Electrocatalysts as Cathodes in Direct Ethylene Glycol Fuel Cells (DEGFC)," Energies, MDPI, vol. 2(4), pages 1-13, October.
    • Handle: RePEc:gam:jeners:v:2:y:2009:i:4:p:944-956:d:6024
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    Cited by:

    1. Bai, Zhengyu & Huang, Rumeng & Shi, Min & Zhang, Qing & Yang, Lin & Yang, Zongxian & Zhang, Jiujun, 2016. "Novel Ag@C nanocables supported Pd anodes and its implication in energy conversion using direct liquid fuel cells," Applied Energy, Elsevier, vol. 175(C), pages 429-434.

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