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• W2468877980 abstract "Nitrogen and fluorine co-doped graphite nanofibers (NF–GNFs) are explored as highly corrosion-resistant support materials and investigated for their possible interaction with Pt as an efficient oxygen reduction reaction (ORR) catalyst in an acidic medium. The Pt/NF–GNF catalyst exhibits enhanced ORR behavior with greater electrochemical stability, which is exclusively attributed to the simultaneous presence of N and F heteroatoms, which induces charge delocalization in the GNF matrix based on the electronegativity difference between carbon and heteroatoms. This facilitates a uniform deposition of Pt nanoparticles over NF–GNFs and interaction between Pt nanoparticles and the GNF support matrix. The Pt/NF–GNF catalyst was subjected to 10,000 repeated potential cycles between 0 and 1.05 V in acidic media, resulting in a 30-mV loss in ORR activity, compared to the activity loss of about 200 mV for commercial Pt/C catalysts. The carbon corrosion and catalyst stability are also determined with more stringent corrosive test cycles, that is, maintaining the potential of the cell as high as 1.4 V for 180 s and later decreasing it to 0.6 V for 30 s versus reversible hydrogen electrode (RHE) for 500 cycles, mimicking the actual conditions of operating fuel cells. Under these harsh corrosive conditions, the Pt/NF–GNF catalyst displayed excellent stability with only a 90-mV loss in E1/2 in relation to the 270-mV loss in E1/2 for commercial Pt/C catalysts. While evaluating the performance of the Pt/NF–GNF catalyst in a polymer electrolyte membrane fuel cell (PEMFC), a peak power density of 867 mW cm−2 was achieved with a minimal Pt loading of 0.1 mg cm−2, which demonstrates the potential application of this catalyst as a cathode catalyst in fuel cell reactions." @default.
• W2468877980 created "2016-07-22" @default.
• W2468877980 creator A5029274203 @default.
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• W2468877980 date "2016-10-01" @default.
• W2468877980 modified "2023-10-03" @default.
• W2468877980 title "Platinum nanoparticles supported on nitrogen and fluorine co-doped graphite nanofibers as an excellent and durable oxygen reduction catalyst for polymer electrolyte fuel cells" @default.
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• W2468877980 doi "https://doi.org/10.1016/j.carbon.2016.06.021" @default.
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