Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지
DOI QR코드

DOI QR Code

Pt Electrocatalysts Composited on Electro-Spun Pt Nanowires for Direct Methanol Fuel Cells

  • 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)
  • Received : 2012.07.10
  • Accepted : 2012.07.28
  • Published : 2012.08.27
Download PDF
⟨ Previous Next ⟩

Abstract

Two types of Pt nanoparticle electrocatalysts were composited on Pt nanowires by a combination of an electrospinning method and an impregnation method with NaBH4 as a reducing agent. The structural properties and electrocatalytic activities for methanol electro-oxidation in direct methanol fuel cells were investigated by means of scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry. In particular, SEM, HRTEM, XRD, and XPS results indicate that the metallic Pt nanoparticles with polycrystalline property are uniformly decorated on the electro-spun Pt nanowires. In order to investigate the catalytic activity of the Pt nanoparticles decorated on the electro-spun Pt nanowires, two types of 20 wt% Pt nanoparticles and 40 wt% Pt nanoparticles decorated on the electro-spun Pt nanowires were fabricated. In addition, for comparison, single Pt nanowires were fabricated via an electrospinning method without an impregnation method. As a result, the cyclic voltammetry and chronoamperometry results demonstrate that the electrode containing 40 wt% Pt nanoparticles exhibits the best catalytic activity for methanol electro-oxidation and the highest electrochemical stability among the single Pt nanowires, the 20 wt% Pt nanoparticles decorated with Pt nanowires, and the 40 wt% Pt nanoparticles decorated with Pt nanowires studied for use in direct methanol fuel cells.

Keywords

References

  1. M. Winter and R. J. Brodd, Chem. Rev., 104, 4245 (2004). https://doi.org/10.1021/cr020730k
  2. 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
  3. E. Antolini, Mater. Chem. Phys., 78, 563 (2003). https://doi.org/10.1016/S0254-0584(02)00389-9
  4. H. -J. Ahn, H. -S. Shim, W. B. Kim, Y. E. Sung and T. -Y. Seong, J. Alloy. Comp., 471, L39 (2009). https://doi.org/10.1016/j.jallcom.2008.04.008
  5. H, -J. Ahn, J. -S. Jang, Y. E. Sung and T. -Y. Seong, J. Alloy. Comp., 473, L28 (2009). https://doi.org/10.1016/j.jallcom.2008.06.063
  6. J. M. Kim, H. -I. Joh, S. M. Jo, D. J. Ahn, H. Y. Ha, S. -A. Hong and S. K. Kim, Electrochim. Acta, 55, 4827 (2010). https://doi.org/10.1016/j.electacta.2010.03.036
  7. Y. S. Kim, S. H. Nam, H. -S. Shim, H. -J. Ahn, M. Anand and W. B. Kim, Electrochem. Comm., 10, 1016 (2008). https://doi.org/10.1016/j.elecom.2008.05.003
  8. Y. -J. Song, S. -B. Han and K. -W. Park, Mater. Lett., 64, 1981 (2010). https://doi.org/10.1016/j.matlet.2010.06.041
  9. J. F. Moulder, W. F. Stickle, P. E. Sobol and K. D. Bomben, Handbook of X-ray Photoelectron Spectroscopy, p.180-181, Physical Electronics, Eden Pairie, MN, USA (2004).
  10. Z. Liu, L. Hong and S. W. Tay, Mater. Chem. Phys., 105, 222 (2007). https://doi.org/10.1016/j.matchemphys.2007.04.045
  11. K. -W. Park, J. -H. Choi, K. -S. Ahn and Y. E. Sung, J. Phys. Chem. B, 108, 5989 (2004). https://doi.org/10.1021/jp037458i
  12. B. R. Rauhe, F. R. Mclarnon and E. J. Cairns, J. Electrochem. Soc., 142, 1073 (1995). https://doi.org/10.1149/1.2044547
  13. Y. -S. Yeom and H. -J. Ahn, Kor. J. Mater. Res., 21, 8 (2011) (in Korean). https://doi.org/10.3740/MRSK.2011.21.1.008

Cited by

  1. Sn Nanoparticles in Carbon Nanofibers Using Co-Electrospinning vol.23, pp.2, 2013, https://doi.org/10.3740/MRSK.2013.23.2.143
  2. Electrochemical Behavior of Well-dispersed Catalysts on Ruthenium Oxide Nanofiber Supports vol.24, pp.2, 2017, https://doi.org/10.4150/KPMI.2017.24.2.96
  3. Templated bipolar electrolysis for fabrication of robust Co and Pt nanorods vol.54, pp.74, 2018, https://doi.org/10.1039/C8CC05986A