An EQCM study of the deposition and doping/dedoping behavior of polypyrrole from phosphoric acid solutions

Influence of electrodeposition potential on composition and ion exchange of polypyrrole films in aqueous hexafluoroaluminate featured by EQCM molar mass to charge factors

“…Mass fluxes accompanying redox switching of polypyrrole have been measured using the EQCM dc method [1] and the EQCM ac method [2]. However, in the most cases, the ion transport processes that were analyzed, involved predominantly monovalent anionic species, as in a case of aqueous polypyrrole phosphate system where H 2 PO À 4 and Na 2 PO À 4 have being the only transported ionic species under consideration [3]. The electropolymerization process of polypyrrole in the presence of naphthalene monosulfonates, disulfonates and trisulfonates has been considered to produce the cross-linking structures with consequences for the ionic transport in the film deposited on an electrode [4].…”

Preparation and electrochemical nanogravimetric study on the ruthenium(III) trichloride-polypyrrole nanocomposite

“…1 [waves PP(red) and PP(ox)], albeit they are somewhat merged with waves I, II and IV. We can assign these waves to the redox transformations of the polypyrrole since the peak potentials are close to those observed for PP films in this electrolyte [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. In order to check the assignment of waves, PP(red) and PP(ox) polypyrroles layers were deposited on the top of (PP) x (RuCl 3 ) y microcrystals by electropolymerization of pyrrole from aqueous solution of 3 × 10 −2 mol dm −3 pyrrole and 0.5 mol dm −3 NaCl.…”

Suppression of the loss of an electroactive dopant from polypyrrole by using a non-aqueous electrolyte of dopant-phobicity

“…To satisfy the conditions of rigid layers which the Sauerbrey equation can apply to [13] and to avoid the viscoelastic effects that can be observed in the case of thick films [14,15], less than 1 lm thin films were used for the EQCM measurements. A linear dependence of the plot Df versus oxidation charge used for polymerization (Q ox ) guaranteed the rigid nature of the polymer film [16].…”