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Nanomaterials 2016, 6(8), 148; doi:10.3390/nano6080148

Methanol-Tolerant Platinum-Palladium Catalyst Supported on Nitrogen-Doped Carbon Nanofiber for High Concentration Direct Methanol Fuel Cells

1
Fuel Cell Research Center, Korea Institute of Energy Research (KIER), Daejeon 305-343, Korea
2
Advanced Energy Technology and System, University of Science and Technology (UST), Daejeon 305-333, Korea
3
Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 816-8580, Japan
*
Authors to whom correspondence should be addressed.
Academic Editor: Thomas Nann
Received: 19 July 2016 / Revised: 19 July 2016 / Accepted: 8 August 2016 / Published: 15 August 2016
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Abstract

Pt-Pd catalyst supported on nitrogen-doped carbon nanofiber (N-CNF) was prepared and evaluated as a cathode electrode of the direct methanol fuel cell (DMFC). The N-CNF, which was directly synthesized by the catalytic chemical vapor deposition from acetonitrile at 640 °C, was verified as having a change of electrochemical surface properties such as oxygen reduction reaction (ORR) activities and the electrochemical double layer compared with common carbon black (CB). To attain the competitive oxygen reduction reaction activity with methanol tolerance, the Pt and Pd metals were supported on the CB or the N-CNF. The physical and electrochemical characteristics of the N-CNF–supported Pt-Pd catalyst were examined and compared with catalyst supported on the CB. In addition, DMFC single cells using these catalysts as the cathode electrode were applied to obtain I-V polarization curves and constant current operating performances with high-concentration methanol as the fuel. Pt-Pd catalysts had obvious ORR activity even in the presence of methanol. The higher power density was obtained at all the methanol concentrations when it applied to the membrane electrode assembly (MEA) of the DMFC. When the N-CNF is used as the catalyst support material, a better performance with high-concentration methanol is expected. View Full-Text
Keywords: nitrogen doped carbon nanofiber; methanol tolerant; oxygen reduction reaction; direct methanol fuel cell nitrogen doped carbon nanofiber; methanol tolerant; oxygen reduction reaction; direct methanol fuel cell
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MDPI and ACS Style

Kim, J.; Jang, J.-S.; Peck, D.-H.; Lee, B.; Yoon, S.-H.; Jung, D.-H. Methanol-Tolerant Platinum-Palladium Catalyst Supported on Nitrogen-Doped Carbon Nanofiber for High Concentration Direct Methanol Fuel Cells. Nanomaterials 2016, 6, 148.

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