Abstract
Three different methods for the preparation and modification of conducting polymer/noble metal catalyst systems consisting of polypyrrole (PPy) and platinum (Pt) are described for the anodic oxidation of methanol. The first method consists of the electrochemical deposition of a thin PPy film on glassy carbon substrate, which is modified with Pt either by electroreduction of hexachloroplatinate, codeposition from a nanodispersed Pt solution, or incorporation of tetrachloroplatinate as counterion followed by cathodic reduction. A second method is based on the preparation of nanoscale PPy(PSS) particles by chemical polymerization with polystyrenesulfonate PSS– as the counterion. This material is a favorable catalyst support for nanodispersed Pt due to its mixed electronic and cationic conductivity. To study the electrochemical properties, the particulate system PPy(PSS)/Pt is fixed in a carbon fiber electrode. A third method was developed which brings the polypyrrole in close contact to a proton exchanger membrane (Nafion) using a special chemical deposition procedure. This method is useful for preparing a membrane electrode assembly (MEA) consisting of Nafion/PPy/Pt. The structural, morphological, and electrocatalytic properties for methanol oxidation were studied depending on the preparation method applied using surface analytical techniques (TEM, SEM, and EDX) and electrochemical measurements (cyclic voltammetry and transient techniques).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
Handbook of Conducting Polymers, Skotheim, T.A., Elsenbaumer, R.L., and Reynolds, J.R., Eds., New York: Marcel Dekker, 1998.
Nalwa, H.S., Handbook of Organic Conductive Molecules and Polymers, Chichester: Wiley, 1997, vols. 1–4.
Weidlich, C., Mangold, K.-M., and Jüttner, K., Electrochim. Acta, 2001, vol. 47, p. 741.
Weidlich, C., Mangold, K.-M., and Jüttner, K., Synth. Met., 2001, vol. 119, p. 263.
Laborde, H., Léger, J.M., and Lamy, C., J. Electroanal. Chem., 1994, vol. 24, pp. 219, 1019.
Bouzek, K., Mangold, K.-M., and Jüttner, K., Electrochim. Acta, 2000, vol. 46, p. 661.
Bouzek, K., Mangold, K.-M., and Jüttner, K., J. Appl. Electrochem., 2001, vol. 31, p. 501.
Díaz, A.F., Kanazawa, K.K., and Gardini, G.P., J. Chem. Soc. Chem. Commun., 1979, p. 635.
Mangold, K.-M., Weidlich, C., Leuze, M., Schäfer, S., and Jüttner, K., Elektrochemische Verfahren für neue Technologien, Kolb, D.M., Mund, K., and Russow, J., Eds., Ges. Deutsch. Chem., 2000, vol. 21, p. 62.
Qi, Z. and Pickup, P.G., Chem. Mater., 1997, vol. 9, p. 2934.
Shan, J. and Pickup, P.G., Electrochim. Acta, 2000, vol. 46, p. 119.
Kessler, T. and Castro Luna, A.M., J. Appl. Electrochem., 2002, vol. 32, p. 825.
Vork, F.T.A., Janssen, L.J.J., and Barendrecht, E., Electrochim. Acta, 1986, vol. 31, p. 1569.
Hepel, M., Yi, M., and Stimming, U., New Materials for Fuel Cell Systems I, Les Edition de l'École Polytechnique de Montréal, Collection “Actes de colloque,” Savadogo, O., Roberge, P.R., and Veziroglu, T.N., Eds., Montreal, Quebec, Canada, 1995, p. 629.
Lai, E.K.W., Beattie, P.D., Orfino, F., Simon, E., and Holdcroft, S., Electrochim. Acta, 1999, vol. 44, p. 2559.
Mangold, K.-M., Meik, F., and Jüttner, K., Synth. Met. (in preparation).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Jüttner, K., Mangold, KM., Lange, M. et al. Preparation and Properties of Composite Polypyrrole/Pt Catalyst Systems. Russian Journal of Electrochemistry 40, 317–325 (2004). https://doi.org/10.1023/B:RUEL.0000019671.39269.25
Issue Date:
DOI: https://doi.org/10.1023/B:RUEL.0000019671.39269.25