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- W2022338495 abstract "Four electrocatalysts, including a commercial Pt on carbon black (Pt-CB), were compared for performance in the reduction of oxygen. Three of the catalysts were prepared on the basis of the deposition of Pt onto carbon nanotubes using (i) water-in-supercritical CO2 microemulsion (Pt-CNT SCME), (ii) direct supercritical CO2 fluid deposition (Pt-CNT SC), and (iii) water-in-hexane microemulsion (Pt-CNT ME). Cyclic voltammetric studies yielded an electrochemically active surface area for Pt-CNT SCME at 31.1 m2/g, which was the largest among all electrocatalysts tested in this work. Hydrodynamic polarization curves for oxygen reduction exhibited that the cell potential of the Pt-CNT SCME catalyst was over 350 mV more positive than the commercial Pt-CB system at 10 A/g of Pt. In chronoamperometric analyses, Pt-CNT SCME catalyst (6.6 × 103 A/g of Pt) generated 2.5 times more specific activity at 30 s than Pt-CNT ME (2.6 × 103 A/g of Pt) and 5 times more than the commercial Pt-CB (1.3 × 103 A/g of Pt). Tafel analysis indicated the exchange current density of 7.87 µA/cm2 for Pt-CNT SCME that was significantly higher than the commercial Pt-CB (1.37 µA/cm2)." @default.
- W2022338495 created "2016-06-24" @default.
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- W2022338495 date "2008-05-30" @default.
- W2022338495 modified "2023-10-05" @default.
- W2022338495 title "Water-in-Supercritical CO<sub>2</sub> Microemulsion for Synthesis of Carbon-Nanotube-Supported Pt Electrocatalyst for the Oxygen Reduction Reaction" @default.
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- W2022338495 doi "https://doi.org/10.1021/ef800052b" @default.
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