Synthesis of a hole‐containing polypyrrole film modified by copper cementation

Abstract

A simple procedure enables to obtain a hole-containing PPy film on SAE 4140 steel in sodium bis(2-ethylhexyl) sulfosuccinate (AOT) solutions. The film characterization was made by electrochemical and morphological studies. The effects of electropolymerization parameters on the obtained morphology are discussed. The formation of the coating is conditioned by the nature of the substrate and surfactant and the electrochemical technique employed. Electrochemical investigations demonstrate that the hole-containing PPy film presents an increase in surface area. The polymer was modified by cementation of copper particles. The modified polymer offers a higher electrocatalytic activity for the HER than usual PPy.

The Synthesis of 2,6-Pyridinedicarboxylic Acid Modified Porous Polypyrrole Electrodes and Its Energy Storage Application

“…This type structure allows easy access of ions to the electrode/electrolyte interface, which was a crucial factor for the faradaic reactions in supercapacitor applications. 53 The electrochemical performances of the PPy/ DCA electrodes supported the SEM analyzes with an increase in the capacitance values of the macroporous structure. The illustration of the interactions between dicarboxylic acid and PPy is shown in Scheme 1.…”

“…As shown in SEM images, large voids provided negligible contribution to the surface area and eliminated the bulk density and good ion exchange ability. 53 By adding 2,6-pyridinedicarboxylic acid, which contains two carboxyl functional groups, as a dopant to the PPy structure, it added new properties that increase the capacitance performance of the polypyrrole electrodes.…”