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- W2890909741 abstract "Sulfonated graphitic carbon nitride (s-GCN) is first realized as an effective bifunctional filler in modifying the Nafion membrane for direct methanol fuel cell (DMFC) application. Carbon nitride with amino (−NH2) and imino (−NH) functional groups was successfully synthesized through one-step calcination of melamine (C3H6N6) and thereafter surface functionalized to incorporate sulfonic acid (−SO3H) groups. The proton transfer in the Nafion–s-GCN hybrid membrane is enhanced by the presence of sulfonic acid groups in the filler and also by acid–base interaction between −NH2 groups present on the GCN with −SO3H groups of hybrid membrane. The Nafion–s-GCN hybrid membrane with an optimized filler content exhibits a proton conductivity of 183 mS cm–1, which is about 36% higher in relation to the pristine Nafion membrane. In addition, porous nature of GCN nanosheets in the hybrid membrane enhances movement of hydronium ions while acting as a barrier for methanol molecule. As a result, the Nafion–s-GCN hybrid membranes displayed much lower methanol crossover current density than that of the pristine Nafion membrane. The DMFC comprising Nafion–s-GCN (0.5 wt %) hybrid membrane delivers a peak power density of 125 mW cm–2 at 70 °C under ambient pressure, while a peak power density of 65 mW cm–2 is realized for pristine Nafion membrane under similar operating conditions." @default.
- W2890909741 created "2018-09-27" @default.
- W2890909741 creator A5029274203 @default.
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- W2890909741 date "2018-09-04" @default.
- W2890909741 modified "2023-10-16" @default.
- W2890909741 title "Graphitic Carbon Nitride Nanosheets—Nafion as a Methanol Barrier Hybrid Membrane for Direct Methanol Fuel Cells" @default.
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- W2890909741 doi "https://doi.org/10.1021/acs.jpcc.8b06042" @default.
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