Oxidation of hydrogen at platinum-polypyrrole electrodes

✍ Scribed by F.T.A. Vork; L.J.J. Janssen; E. Barendrecht

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 532 KB
• Volume: 31
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(86)87076-1

✦ Synopsis

Polypyrrole, an electronic conducting polymer, is used as a matrix for the dispersion of Pt particles . These particles can be included by two methods, viz . (1) by electrochemical deposition of platinum particles on a polypyrrole covered glassy carbon disc and (2) by incorporation of Pt particles during the polymerization of pyrrole on a glassy carbon disc . As a model reaction the oxidation of hydrogen at these electrodes is studied. The polypyrrole electrodes prepared by method (1) exhibit a good catalytic behaviour, The other type of electrodes however show, despite the higher Pt loading, much less activity . Additionally, electrodes were prepared according to method (1) with poly(N-methylpyrrole) and polyaniline as the conducting polymer. These electrodes show a similar diffusion limited behaviour for the oxidation of hydrogen as polypyrrole-modified electrodes, however the oxidation starts at a much higher potential .