Oxygen reduction on carbon supported platinum catalysts in high temperature polymer electrolytes

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Abstract

Oxygen reduction on carbon supported platinum catalysts has been investigated in H3PO4, H3PO4-doped Nafion and polybenzimidazole (PBI) polymer electrolytes in a temperature range up to 190 degrees C. Compared with pure H3PO4, the combination of H3PO4 and polymer electrolytes can significantly improve the oxygen reduction kinetics due to increased oxygen solubility and suppressed adsorption of phosphoric acid anions. Further enhancement of the catalytic activity can be obtained by operating the polymer electrolytes at higher temperatures. Efforts have been made to develop a polymer electrolyte membrane fuel cell based on H3PO4-doped PBI for operation at temperatures between 150 and 200 degrees C. (C) 2000 Elsevier Science Ltd. All rights reserved.
Original languageEnglish
JournalElectrochimica Acta
Volume45
Issue number25-26
Pages (from-to)4219-4226
ISSN0013-4686
DOIs
Publication statusPublished - 2000
Event3rd Electrocatalysis Meeting (ECS 99) - Portoroz, Slovenia
Duration: 1 Jan 1999 → …
Conference number: 3

Conference

Conference3rd Electrocatalysis Meeting (ECS 99)
Number3
CountrySlovenia
CityPortoroz
Period01/01/1999 → …

Keywords

  • Oxygen reduction
  • Platinum
  • Nafion
  • Polybenzimidazole
  • Phosphoric acid

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