Mamlouk, Mohamed Jang, Jong Hyun Scott, Keith 2024-01-20T15:32:23Z 2024-01-20T15:32:23Z 2021-09-05 2012-02 1550-624X https://pubs.kist.re.kr/handle/201004/129596 The oxygen reduction activities of platinum and platinum alloy catalysts were evaluated at temperatures up to 150 degrees C 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 deactivationcould 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 degrees C. The commercial PtCo catalyst showed high activities at 90 degrees C and 120 degrees C. 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. DOI: 10.1115/1.4004461] English ASME POLYMER ELECTROLYTE MEMBRANE PT-CO ALLOYS DOPED POLYBENZIMIDAZOLE MICROEMULSION METHOD PARTICLE-SIZE ELECTROCATALYSTS PERFORMANCE SURFACE FE NI Intermediate Temperature Fuel Cell and Oxygen Reduction Studies With Carbon-Supported Platinum Alloy Catalysts in Phosphoric Acid Based Systems Article 10.1115/1.4004461 1 JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY, v.9, no.1 JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY 9 1 scie scopus 000298542000002 2-s2.0-84855398099 Electrochemistry Energy & Fuels Electrochemistry Energy & Fuels Article POLYMER ELECTROLYTE MEMBRANE PT-CO ALLOYS DOPED POLYBENZIMIDAZOLE MICROEMULSION METHOD PARTICLE-SIZE ELECTROCATALYSTS PERFORMANCE SURFACE FE NI phosphoric acid polybenzimidazole PBI Pt alloy electrocatalyst oxygen reduction PEMFC fuel cell