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dc.contributor.authorLizong Dai
dc.contributor.author戴李宗
dc.contributor.authorYiting Xu
dc.contributor.authorYunyou He
dc.contributor.authorJean-Yves Gal
dc.contributor.authorHuihuang Wu
dc.contributor.author吴辉煌
dc.date.accessioned2011-11-11T14:37:21Z
dc.date.available2011-11-11T14:37:21Z
dc.date.issued2005-05
dc.identifier.citationPOLYMER INTERNATIONAL,2005,54(9):1256-1261zh_CN
dc.identifier.issn0959-8103
dc.identifier.urihttp://dx.doi.org/doi:10.1002/pi.1838
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11162
dc.description.abstractThe redox behavior of polyanilines with ring-substituted groups synthesized by chemical polymerization, poly-2,5-dimethoxyaniline (PDMAn), poly-m-chloroaniline (PmClAn) and poly-o-toluidine (POT), was studied and the morphology and crystal orientation of platinum particles deposited on these polymer membranes was compared. The oxidation of isopropanol on platinized polyaniline-modified electrodes as a model reaction was also investigated to examine the electrocatalytic properties of the polymers. The results show that the first oxidation potential of the polymers increases in the following sequence: PDMAn, POT and then PmClAn, which can be explained in terms of the electronic and steric effects of ring-substituted groups. The growth of Pt particles electrodeposited on doping-state POT and PDMAn polymer membranes takes place by a 'progressive nucleation mechanism', but by an 'instantaneous nucleation mechanism' on PmClAn. Platinum crystallites trend towards preferred-orientation and Pt (200) is the preferred face, but the degree of preferred orientation depends on the polymer. The oxidation potentials of isopropanol are located near 0.3 V, and the oxidation currents increase on platinized polymer-modified electrodes, indicating that the interaction of polymer with Pt particles might improve the catalytic activity of Pt. Polyanilines act not only as dispersion media but also change the electronic properties of Pt crystalline grains. (c) 2005 Society of Chemical Industry.zh_CN
dc.language.isoenzh_CN
dc.publisherJOHN WILEY & SONS LTDzh_CN
dc.subjectring-substituted polyanilineszh_CN
dc.subjectmetallized polymerzh_CN
dc.subjectisopropanol oxidationzh_CN
dc.subjectpolymer membrane modified electrodeszh_CN
dc.titleA comparative study on the electrochemical properties of ring-substituted polyanilineszh_CN
dc.typeArticlezh_CN


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