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

F. Javier Rodríguez Varela, Sergio Luna and Oumarou Savadogo

Article (2009)

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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 degrees 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.

Uncontrolled Keywords

Pd-based cathodes; T; Pd-based cathodes; oxygen reduction reaction; tolerance to organic molecules; ethylene glycol as fuel; direct ethylene glycol fuel cells; ethylene glycol as fuel; tolerance to organic molecules; DOAJ:Technology and Engineering; oxygen reduction reaction; direct ethylene glycol fuel cells; DOAJ:Chemical Technology; Chemical technology; TP1-1185; Technology

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
2300 Fuel and energy technology > 2303 Other sources of energy (solar, wind, etc.)
Department: Department of Chemical Engineering
Research Center: Other
Funders: National Council for Science and Technology
Grant number: 52024
PolyPublie URL: https://publications.polymtl.ca/3393/
Journal Title: Energies (vol. 2, no. 4)
Publisher: MDPI
DOI: 10.3390/en20400944
Official URL: https://doi.org/10.3390/en20400944
Date Deposited: 13 Dec 2018 10:52
Last Modified: 11 Apr 2024 10:07
Cite in APA 7: Rodríguez Varela, F. J., Luna, S., & Savadogo, O. (2009). Synthesis and Evaluation of Highly Tolerant Pd Electrocatalysts as Cathodes in Direct Ethylene Glycol Fuel Cells (DEGFC). Energies, 2(4), 944-956. https://doi.org/10.3390/en20400944

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