Journal
SOLID STATE SCIENCES
Volume 13, Issue 8, Pages 1612-1615Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2011.06.011
Keywords
Direct methanol fuel cells; Pt; Porous; Methanol electro-oxidation; Colloidal crystals
Funding
- National Research Foundation of Korea(NRF)
- Ministry of Education, Science and Technology [2010-0005302]
- National Research Foundation of Korea [2010-0005302] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We have fabricated macroporous Pt wire electrodes via electroplating by using polycarbonate membranes with the pores filled with polystyrene colloidal crystals. The macroporous structure of the resulting Pt wire electrodes is the inverse replica of the colloidal crystal templates. Scanning electron microscopy, Transmission electron microscopy, and X-ray diffraction analysis show the successful formation of macroporous Pt wire electrodes. The catalytic activity of methanol electro-oxidation on the resulting macroporous Pt-wire electrodes due to the three dimensional continuous porous structures is 21.0 mA/cm(2) at 0.718 V, which is 3.8 times higher that of the dense Pt wire electrodes, 5.4 mA/cm(2), obtained without use of the colloidal crystals as templates. The chronoamperometry results demonstrate that the macroporous Pt wire electrodes exhibit superior catalytic stability as compared with the dense Pt wire electrode and the commercial Pt/C catalyst. (C) 2011 Elsevier Masson SAS. All rights reserved.
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