Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-16T18:05:31.614Z Has data issue: false hasContentIssue false
  • English
  • Français

Ion Beam Modification of Pt Electrocatalyst Nanoparticles for Polymer Electrolyte Membrane Fuel Cells

Published online by Cambridge University Press:  31 January 2011

Tetsuya Yamaki ,
Shunya Yamamoto ,
Teruyuki Hakoda  and
Hiroshi Koshikawa
Tetsuya Yamaki
Affiliation:
[email protected], Japan Atomic Energy Agency, Quantum Beam Science Directorate, Takasaki, Japan
Shunya Yamamoto
Affiliation:
[email protected], Japan Atomic Energy Agency, Quantum Beam Science Directorate, Takasaki, Gunma, Japan
Teruyuki Hakoda
Affiliation:
[email protected], Japan Atomic Energy Agency, Quantum Beam Science Directorate, Takasaki, Gunma, Japan
Hiroshi Koshikawa
Affiliation:
[email protected], Japan Atomic Energy Agency, Quantum Beam Science Directorate, Takasaki, Gunma, Japan
Get access

Abstract

Platinum (Pt) nanoparticles were prepared on a glassy carbon plate by a sputtering method and then irradiated with proton (H+) beams at energies of 0.38 and 10 MeV at room temperature. Cyclic voltammetry in an aqueous 0.5 mol/dm3 H2SO4 solution suggested that the lower-energy beam irradiation enhanced the active surface area of the Pt nanoparticles, calculated from the coulombic charge for hydrogen desorption. Thus, the nanoparticles would be modified by H+ beam-induced electronic excitation so that they have higher surface activity. The mechanism of this irradiation effect seems to be rather complicated and is still unclear at present, but we may discuss it in relation to a change in the interfacial crystal structure during the irradiation.

Keywords

catalyticPtion-beam processing
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1217: Symposium Y – Catalytic Materials for Energy, Green Processes and Nanotechnology , 2009 , 1217-Y08-26
Copyright
Copyright © Materials Research Society 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Vielstich, W., Lamm, A. and Gasteiger, H.A., Handbook of Fuel Cells: Fundamentals, Technology, and Applications; Volume 2: Fuel Cell Electrocatalysis (John Wiley & Son, Ltd., England, 2003).Google Scholar
2 Wang, L.-M., Radiation Effects and Ion-Beam Processing of Materials (Mater. Res. Soc. Symp. Proc. 792, Boston, MA, 2004).Google Scholar
3 Yamaki, T., Yamada, T., Asai, K., Ishigure, K. and Shibata, H., Thin Solid Films 327–329, 581 (1998).Google Scholar
4 Yamaki, T., Asai, K., Ishigure, K. and Shibata, H., Radiat. Phys. Chem. 50, 199 (1997).Google Scholar
5 Hirano, S., Kim, J. and Srinivasan, S., Electrochim. Acta 42, 1587 (1997).Google Scholar
6 Ziegler, J.F., Biersack, J.P., and Littmack, U., The Stopping Range of Ions in Solids (Pergamon Press, New York, 1985).Google Scholar
7 Bard, A.J. and Faulkner, L.R., Electrochemical Methods: Fundamentals and Applications, 2nd ed. (John Wiley & Son, Inc., Hoboken, NJ, 2001).Google Scholar
8 Mukerjee, S., Srinivasan, S. and Appleby, A.J., Electrochim. Acta 38, 1661 (1993).Google Scholar
9 Wang, S., Jiang, S.P., White, T.J., Guo, J. and Wang, X., J. Phys. Chem. C 113, 18935 (2009).Google Scholar
10 Kobayashi, N., Hasegawa, M., Kobayashi, H., Hayashi, N., Shinohara, M., Ohtani, F. and Asari, M., Nucl. Instrum. Meth. B 59-60, 149 (1991).Google Scholar
11 Clavilier, J., Rodes, A., Elachi, K. and Zamakhchari, M.A., J. Chim. Phys. PCB 88, 1291 (1991).Google Scholar
12 Tian, N., Zhou, Z.-Y., Sun, S.-G., Ding, Y. and Wang, Z.L., Science 316, 732 (2007).Google Scholar