Intermediate temperature fuel cell and oxygen reduction studies with carbon-supported platinum alloy catalysts in phosphoric acid based systems
- Intermediate temperature fuel cell and oxygen reduction studies with carbon-supported platinum alloy catalysts in phosphoric acid based systems
- Mohamed Mamlouk; 장종현; Keith Scott
- PEMFC; high temperature; catalyst; phosphoric acid; polybenzimidazole; PBI; Pt alloy; electrocatalyst; oxygen reduction; fuel cell
- Issue Date
- Journal of fuel cell science and technology
- VOL 9, NO 1, 011002-1-011002-9
- The oxygen reduction activities of platinum and platinum alloy catalysts were evaluated
at temperatures up to 150 ℃ in phosphoric acid solution. The oxygen reduction currents
and open circuit potentials were measured using chronoamperometry with double potential
steps to eliminate the effects of double layer charging currents and metal deactivation
could be eliminated effectively. Based on the mass activity at 0.7 V versus Ag/AgCl, the
commercial PtNi catalyst showed higher performances than commercial Pt catalyst at
150 ℃. The commercial PtCo catalyst showed high activities at 90 ℃ and 120 ℃. Intermediate
temperature fuel cells based on phosphoric acid doped polybenzimidazole membranes
were tested with the alloy cathode catalysts. In the case of Pt–Fe alloy an
enhanced performance was achieved in comparison to that with Pt carbon catalysts.
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