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Electrocatalytic properties of Co, Pt, and Pt-Co on carbon for the reduction of oxygen in alkaline fuel cells
KTH, School of Chemical Science and Engineering (CHE).
1996 (English)In: Journal of the Electrochemical Society, ISSN 00134651 (ISSN), Vol. 143, no 7, 2152-2157 p.Article in journal (Refereed) Published
Abstract [en]

The effect of cobalt, platinum, and cobalt-platinum, alloys on high surface area carbons for oxygen reduction in alkaline electrolyte was investigated. The Pt-Co catalyst with ca. 1:3 atomic ratio was prepared by addition of H2PtCl6 solution to a mixture of methanol and a 5% surfactant in deionized water containing cobalt acetate and carbon suspension. This was followed by drying and heat-treatment at 700 and 900°C in a flow of hydrogen and nitrogen gas mixtures. Polarization curves and kinetic parameters for Pt, Co, and Pt-Co were conducted and compared in 6 M KOH and at 80°C. Higher activities were observed for the Pt-Co alloy, that had been heat treated at 900°C. In addition to increased activity of this catalyst, the unalloyed base metal (Co) contributes to total performance improvement of the oxygen reduction process. Furthermore, surface, structural, and chemical characterizations of the catalysts were carried out using transmission electron microscopy, x-ray diffraction, Brunauer, Emmett, and Teller method, and atomic absorption spectroscopy. Dissolution of cobalt from the electrodes, both from the single cobalt phase and Pt-Co alloy catalysts, has been established. The x-ray results demonstrated a shift to lower lattice parameters (3.618 Å) by the Pt-Co alloys, prepared at 900°C, than the pure platinum catalyst (3.919 Å).

Place, publisher, year, edition, pages
1996. Vol. 143, no 7, 2152-2157 p.
Keyword [en]
Carbon, Catalyst activity, Catalysts, Cobalt, Cobalt alloys, Electrochemistry, Oxygen, Platinum, Reaction kinetics, Reduction, Transmission electron microscopy, X ray diffraction analysis, Alkaline fuel cells, High surface area carbons, Fuel cells
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-62361OAI: diva2:480211
References: Bagotzky, V.S., Khruscheva, E.I., Tarasevich, M.R., Shumilova, N.A., (1982) J. Power Sources, 8, p. 301; Tilak, B.V., Yeo, R.S., Srinivasan, S., (1981) Comprehensive Treatise of Electrochemistry, 3, p. 63. , J. O'M. Bockris, B. E. Conway, E. Yeager, and R. E. White, Editors, Plenum, New York; Blurton, K.F., Kunz, H.R., Rutt, D.R., (1978) Electrochim. Acta, 23, p. 183; Tomantscheger, K., Findlay, R., Hanson, M., Kordesch, K., Srinivasan, S., (1992) J. Power Sources, 39, p. 21; Tseung, A.C.C., Dhara, S.C., (1975) Electrochim. Acta, 20, p. 681; Honji, A., Mori, T., Tamura, K., Hishinuma, Y., (1988) This Journal, 135, p. 355; Bett, J.A.S., Kinoshita, K., Stonehart, P., (1976) J. Catal., 41, p. 124; Gruver, G.A., (1978) This Journal, 125, p. 1719; Ruckenstein, E., Pulvermacher, B., (1973) J. Catal., 29, p. 224; Ross, P.N., (1979) This Journal, 126, p. 67; Kinoshita, K., (1990) This Journal, 137, p. 845; Ross, P.N., (1991) Electrochim. Acta, 36, p. 2053. , and references cited therein; Jalan, V.M., U.S. Pat. 4,202,934 (1980)Luczak, F.J., Landsman, D.A., U.S. Pat. 4,677,092 (1987)Beard, B.C., Ross, P.N., (1988) This Journal, 133, p. 1839; Beard, B.C., Ross, P.N., (1990) This Journal, 137, p. 3368; Paffett, M.T., Beery, J.G., Gottesfeld, S., (1988) This Journal, 135, p. 1431; Kim, K.T., Hwang, J.T., Kim, Y.G., Chung, J.S., (1993) This Journal, 140, p. 31; Watanabe, M., Tsurumi, K., Mizukami, T., Nakamura, T., Stonehart, P., (1994) This Journal, 141, p. 2659; Jalan, V., Taylor, E.J., (1983) This Journal, 130, p. 2299; Kiros, Y., Schwartz, S., (1991) J. Power Sources, 36, p. 547; Kiros, Y., Lindström, O., Kaimakis, T., (1993) J. Power Sources, 45, p. 219; Klug, H.P., Alexander, L.E., (1974) X-Ray Diffraction Procedures for Polycrstalline and Amorphous Materials, p. 656. , John Wiley & Sons, New York; Cullity, B.D., (1978) Elements of X-Ray Diffraction, 2nd Ed., p. 506. , Addison-Wesley, Reading, MA; Kirk-Othmer, (1979) Encyclopedia of Chemical Technology, Vol.6, 3rd Ed., 6, p. 490. , John Wiley & Sons, New York and references cited therein; Martin, D.L., (1958) Trans. Metall. Soc. AIME, 212, p. 478; Bugnard, J.M., Baudoing-Savois, R., Gauthier, Y., Hill, E.K., (1993) Surf. Sci., 281, p. 62; Fuller, T.F., Luczak, F.J., Wheeler, D.J., (1995) This Journal, 142, p. 1752; McCabe, W.L., Smith, J.C., (1976) Unit Operations of Chemical Engineering, 3rd Ed., p. 808. , McGraw-Hill, New York; Sepa, D.B., Vojnovic, M.V., Damjanovic, A., (1980) Electrochim. Acta, 25, p. 1491; Sepa, D.B., Vijnovic, M.V., Damjanovic, A., (1981) Electrochim. Acta, 26, p. 781; Tarasevich, M.R., Radushkina, K.A., (1971) Elektrokhimiya, 7, p. 248; Damjanovic, A., Genshaw, M.A., Bockris, J.O'M., (1967) This Journal, 114, p. 1107; Vogel, W.M., Lundquist, J.T., (1970) This Journal, 117, p. 1512; Kim, K.T., Kim, Y.G., Chung, J.S., (1995) This Journal, 142, p. 1531; Srinivasan, S., Velev, O.A., Parthasarathy, A., Manko, D.J., Appleby, A.J., (1991) J. Power Sources, 36, p. 299; Jiang, S.P., Lin, Z.G., Tseung, A.C.C., (1990) This Journal, 137, p. 764 NR 20140805Available from: 2012-01-19 Created: 2012-01-19 Last updated: 2012-01-19Bibliographically approved

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