Reverse-Current Decay in Hydroxide Exchange Membrane Fuel Cells
| Autor: | Mariah D. Woodroof, Robert B. Kaspar, Wittkopf Jarrid, Matthew Armstrong, Yushan Yan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Base (chemistry) 020209 energy Inorganic chemistry chemistry.chemical_element Proton exchange membrane fuel cell 02 engineering and technology Internal resistance 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law 0202 electrical engineering electronic engineering information engineering Materials Chemistry Electrochemistry chemistry.chemical_classification Renewable Energy Sustainability and the Environment Condensed Matter Physics Cathode 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode Membrane chemistry Hydroxide Carbon Nuclear chemistry |
| Zdroj: | Journal of The Electrochemical Society. 163:F377-F383 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/2.041605jes |
| Popis: | In proton exchange membrane fuel cells (PEMFCs), the cathode carbon support corrodes during startup and shutdown by reverse-current decay (RCD). We show for the first time that hydroxide exchange membrane fuel cells (HEMFCs) also undergo RCD. We find that decreasing the oxygen reduction reaction (ORR) activity of the anode catalyst mitigates RCD: a Ru anode causes less corrosion than Pt, Ir, and Pd anodes, as expected from their ORR activities. After an intensive 6 h RCD test, an HEMFC based on Ru shows six times lower internal resistance compared to Pt (1.02 vs. 6.01 Ω cm2). Due to its enhanced ORR activity in base, carbon alone can sustain RCD. To minimize RCD the carbon support should be eliminated from the anode catalyst. |
| Databáze: | OpenAIRE |
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