Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Methanol Electro-Oxidation Properties of Pt Electro-Catalysts Embedded by Porous Carbon Nanofiber Supports

다공성 탄소나노섬유 지지체에 담지된 백금촉매의 메탄올 산화 특성 연구

  • Sin, Dong-Yo (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • An, Geon-Hyoung (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Ahn, Hyo-Jin (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 신동요 (서울과학기술대학교 신소재공학과) ;
  • 안건형 (서울과학기술대학교 신소재공학과) ;
  • 안효진 (서울과학기술대학교 신소재공학과)
  • Received : 2015.01.08
  • Accepted : 2015.01.23
  • Published : 2015.03.27
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Abstract

To improve the methanol electro-oxidation in direct methanol fuel cells(DMFCs), Pt electrocatalysts embedded on porous carbon nanofibers(CNFs) were synthesized by electrospinning followed by a reduction method. To fabricate the porous CNFs, we prepared three types of porous CNFs using three different amount of a styrene-co-acrylonitrile(SAN) polymer: 0.2 wt%, 0.5 wt%, and 1 wt%, respectively. A SAN polymer, which provides vacant spaces in porous CNFs, was decomposed and burn out during the carbonization. The structure and morphology of the samples were examined using field emission scanning electron microscopy and transmission electron microscopy and their surface area were measured using the Brunauer-Emmett-Teller(BET). The crystallinities and chemical compositions of the samples were examined using X-ray diffraction and X-ray photoelectron spectroscopy. The electrochemical properties on the methanol electro-oxidation were characterized using cyclic voltammetry and chronoamperometry. Pt electrocatalysts embedded on porous CNFs containing 0.5 wt% SAN polymer exhibited the improved methanol oxidation and electrocatalytic stability compared to Pt/conventional CNFs and commercial Pt/C(40 wt% Pt on Vulcan carbon, E-TEK).

Keywords

References

  1. Y-S Kim, S-H Nam, H-S Shim, H-J Ahn, M-An and WB Kim, Electrochem. Commun., 10, 1016 (2008). https://doi.org/10.1016/j.elecom.2008.05.003
  2. M-Winter and R-J Brodd, Chem. Rev., 104, 4245 (2004). https://doi.org/10.1021/cr020730k
  3. H-J Ahn, W- J Moon, T-Y Seong and D-Wang, Electrochem. Comm., 11, 635 (2009). https://doi.org/10.1016/j.elecom.2008.12.056
  4. G-H An and H-J Ahn, J. Electroanal. Chem., 707, 74 (2013). https://doi.org/10.1016/j.jelechem.2013.08.024
  5. S-Sharma and B-G Pollet, J. Power. Sources, 208, 96 (2012). https://doi.org/10.1016/j.jpowsour.2012.02.011
  6. G-H An and H-J Ahn, Kor. J. Mater. Res., 23, 2 (2013).
  7. B-Y Koo, G-H An and H-J Ahn, J. Kor. Powd. Met. Inst., 21, 2 (2014).
  8. G-H An and H-J Ahn, Carbon, 65, 87 (2013). https://doi.org/10.1016/j.carbon.2013.08.002
  9. S-Kang, S-Lim, D-H Peck, S-K Kim, D-H Jung, S-H Hong, H-G Jung and Y-Shul., Int. J. Hydrogen Energy, 37, 4685 (2012). https://doi.org/10.1016/j.ijhydene.2011.04.119
  10. D-Sebastian, J-C Calderon, J-A Gonzalez-Exposito, EPastor, M-V Martlnez-Huerta, I-Suelves, R- Moliner and M-J Lazaro, Int. J. Hydrogen Energy, 35, 9934 (2010). https://doi.org/10.1016/j.ijhydene.2009.12.004
  11. B-S Lee, S-B Son, K-M Park, G-S Lee, K-H Oh, S-H Lee and W-R Yu, ACS Appl. Mater. Interfaces, 4, 6702 (2012). https://doi.org/10.1021/am301873d
  12. Tijmen G-Ros, Adrianus J-van Dillen, John W-Geus and Diederik C-Koningsberger, Chem. Eur. J., 8, 5 (2002). https://doi.org/10.1002/1521-3765(20020104)8:1<5::AID-CHEM5>3.0.CO;2-K
  13. X-Ye, J-Sha, Z-Jiao and L- Zhang, Nanostruct. Mater., 8, 919 (1997). https://doi.org/10.1016/S0965-9773(98)00013-0
  14. J-F Moulder, W-F Stickle, P-E Sobol and K-D Bomben, Handbook of X-ray Photoelectron Spectroscopy, Physical Electronics, Eden Pairie, MN, U.S.A, p.180-181 (1995).

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