A comparative study of the electrodeposition of polypyrrole from protic and aprotic ionic liquids

Campos de Jordao

Simposio; XIX Simpósio Brasileiro de Eletroquímica e Eletroanalítica,; 2013

SBQ

Abstract: Protic ionic liquids (PILs) are promising electrolytes for improving electrochemical performance of modified electrodes. PILs are a subset of ionic liquids which are formed through proton transfer from a Brønsted acid to a Brønsted base. These ionic liquids, having one available proton, can be employed in the synthesis of conducting polymers, bringing together two of the most interesting areas of research in recent years. Conducting polymers, certainly, have the potential to allow the fabrication of electrochemical devices like batteries, chemical sensors, supercapacitors, and electrochromics actuators [1,2]. In this work, the electropolymerization of pyrrole were carried out by cyclic voltammetry in a protic ionic liquid: N-methylpiperidinium tetrafluoroborate [MHP][BF4] and an aprotic ionic liquid: 1-butyl-2,3-dimethylimidazolium tetrafluoroborate [BMMI][BF4], containing 0.1 molL-1 of pyrrole. In order to understand if the species that participated in the charge balancing process is mainly the proton, Cyclic voltammetry (CVs) of modified electrodes in both ILs containing the same anion and different cations were performed.