S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Nano-structured Pt–Cr anode catalyst over carbon support, for direct methanol fuel cell
- Choi, Jae-Sik; Chung, Won Seob; Ha, Heung Yong; Lim, Tae-Hoon; Oh, In-Hwan; Hong, Seong-Ahn; Lee, Ho-In
- Issue Date
- Journal of Power Sources 156 (2006) 466–471
- In this study, several kinds of carbon were used as the support for the Pt-based catalyst of the direct methanol fuel cell (DMFC). Mesoporous
carbons with large BET surface area and a commercial carbon were used as the support for the anode catalyst. The maximum current densities
of the catalysts were compared by cyclic voltammogram. The catalyst supported on Vulcan XC-72, the commercial carbon support, showed
the highest catalytic activity because of its high electric conductivity in spite of small BET surface area. Transition metals such as Cr, Mn,
Y, or Zn were impregnated simultaneously with a Pt precursor on Vulcan XC-72, respectively, and then the catalytic activity was tested. The
Pt–Cr/C catalyst showed the highest catalytic activity among this catalyst series, and was more active than the Pt/C catalyst. Furthermore, in
order to improve the activity of the Pt–Cr/C catalyst, sintering of active metals by thermal reduction during the preparation should be avoided.
Therefore, alkaline aluminum leaching method was applied for the purpose of decreasing the particle size of the active metals by reducing
the sintering of Pt and Cr. Aluminum precursor was introduced together with Pt and Cr precursors into the commercial carbon support in the
preparation process. After reduction of the sample, aluminum species were selectively leached out. The catalyst showed a much improved
activity as expected and characterized by H2 chemisorption and TEM analyses.
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