NDLI: Synthesis and electrocatalytic properties of polypyrrole doped by phosphonolybdic acid anions

Content Provider	IEEE Xplore Digital Library
Author	Pokhodenko, V.D. Koshechko, V.G. Titov, V.E. Barsukov, E.P.
Copyright Year	1994
Description	Author affiliation: L.V. Pisarzhevsky Institute of Physical Chemistry of the Academy of Sciences of Ukraine (Pokhodenko, V.D.)
Abstract	Summary form only given. New routes to obtain Keggin structure phosphomolybdic heteropolyacid aniones doped polypyrrole were elaborated, and its spectral and electrochemical characteristics investigated. Pyrrole was found to be oxidized by non-aqueous phosphomolybdenic acid and its salts in CH/sub 3/CN, that cause polymerization. As was revealed, phosphomolybdic heteropoly acid anions are capable of catalysing pyrrole electrochemical polymerization. The chemicaly and electrochemicaly produced polypyrrole was shown to be doped by heteropolyanions of the structure H/sub (3+k)=n/Pmo/sub 12/O/sub 40'/ where (0< k< 6), (0< n< 3). The charge-discharge characteristics of the resulting material were studied by CVA and chroncamperometry techniques. The results evidence involvement heteropolyanions dopants in the redox conversions of the material. The electrochemical oxidation of a variety of organic substrates (naphtalene, antracene, tetramethylhydroquinone, hydroquinone, 2,6-ditertbutylphenol, tri-p-tolylamine, benzylalcohol etc.) on a platinum electrode coated with a heteropoly anions doped polypyrrole was studied. The electrocatalytic effect of anodic tetra methylhydroquinone, hydroquinone and tri-p-tolylamine oxidation on such electrodes was revealed. This makes it possible to effect oxidation of the above compounds on an electrode covered with heteropolyanions doped polypyrrole at lower potentials and a higher current density compered to perchlorate-anions doped polypyrrole electrode and an unmodified Pt electrode. The effect found is ascribed to the electrocatalytic action of heteropolyacid anions in the course of anodic oxidation.
Starting Page	299
Ending Page	299
File Size	101988
Page Count	1
File Format	PDF
DOI	10.1109/STSM.1994.835331
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-07-24
Publisher Place	Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Chemistry Platinum Oxidation Polymers Current density Chemicals
Content Type	Text
Resource Type	Article

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