Electrochemical Deposition of Poly(o-phenylenediamine) Films on Type 304 Stainless Steel

Abstract

Adherent electroactive films of poly͑o-phenylenediamine͒ ͑PPD͒ were obtained by electropolymerization of o-phenylenediamine ͑o-PD͒ on 304 stainless steel under potentiostatic conditions. The in situ Fourier transform infrared reflectance spectroscopy study suggests a phenazine ring ladder-structure polymer. Open circuit potential and potentiodynamic studies of PPD-coated steel electrodes, in chloride aqueous solution show a positive shift of the corrosion potential.

<i>In Situ</i> UV–Vis Spectroelectrochemical Studies on the Copolymerization of Diphenylamine and <i>o</i>-Phenylenediamine

“…Due to the potential applications of poly (o-pheny-lenediamine) (POPD) in the fields of electrochromism [22], sensors [23][24][25], rechargeable batteries [26] and corrosion protection [27], etc, the copolymers of OPD and other aniline derivatives have been widely studied in order to improve the properties of homopolymers. Recently, Holze et al [28,29] have reported the electrochemical copolymerization of OPD with o-toluidine (OT) and MT, respectively, both being substituted anilines, with various concentrations of OPD in the feed.…”

Electrochemical copolymerization of o-toluidine and o-phenylenediamine

“…A close analysis of the literature shows a large number of reports on the chemical and electrochemical synthesis of polytoluidine, polyphenylenediamine and their copolymers with aniline and other substituted anilines [10][11][12][13][14][15][16][17][18]. These homo-and copolymers have also been tested for various applications in sensors [19,20], in corrosion inhibition [21] and in rechargeable batteries [22]. So far there is no report on the chemical or electrochemical copolymerization of phenylenediamine with o-toluidine.…”

Application of poly(o-phenylenediamine) in rechargeable cells

“…PoPD shows only one redox process at all pH values instead of two redox processes as in polyaniline [12,13]. PoPD has been tested for applications in humidity sensors [14], biosensors [15], corrosion inhibition [16] and electrocatalysis [17][18][19][20]. A composite electrode of PoPD incorporated with Pt microparticles has been tested for the electrocatalytic reduction of hydrogen peroxide [19] and oxidation of methanol [20].…”