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Electrochemistry of modified electrodes in protic ionic liquids

Grant number: 11/20711-3
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): April 01, 2012
Effective date (End): January 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Roberto Manuel Torresi
Grantee:Ricardo Ariel Fernández
Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:09/53199-3 - Molecular recognition and energy storage: fundamental studies concerning geometry, size and synthesis effects on the optimization of the chemical properties of electroactive materials, AP.TEM


Protic ionic liquids (PILs) are promising electrolytes to obtain an improved electrochemical performance of modified electrodes. This fact is associated with their unique physicochemical properties, such that the transport of protons is in a dry environment (<30 ppm water). Many studies of aprotic ionic liquids derived nitrogen cation with various anions have been performed, but PILs were not yet much explored in relation to its ability to improve the performance of redox phenomena of modified electrodes.In order to study the electrochemical properties of different materials using PILs as electrolytes, it is intended to use PILs derived from imidazolium, piridium and pirrolidinium cations with different acids. It will be performed FTIR, NMR, thermogravimetry (TG) and differential scanning calorimetry (DSC) experiments to characterize the physicochemical properties of the PILs and also different electrochemical techniques for the study of modified electrodes with transition metal oxides or conductive polymers in these new electrolytic medium. The electrode materials studied were chosen considering during the redox processes, the electroneutralization is carried mainly by protons when the electrolyte is aqueous. However, it is known that many transition metal oxides or conductive polymers undergo decomposition or inactivation processes in these media. This is the main motivation for choosing PILs where it is expected that the processes that cause the decrease of electroactivity are minimized or eliminated. These studies are of fundamental importance for applications of these matrices for electroactive materials for sensors and supercacitores.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FERNANDEZ, R. A.; BENEDETTI, T. M.; TORRESI, R. M.. Comparative electrochemical performance of electrodeposited polypyrrole in protic and aprotic ionic liquids. Journal of Electroanalytical Chemistry, v. 737, n. SI, p. 23-29, . (09/53199-3, 12/02117-0, 11/20711-3)
FERNANDEZ, R. A.; BENEDETTI, T. M.; TORRESI, R. M.. Comparative electrochemical performance of electrodeposited polypyrrole in protic and aprotic ionic liquids. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 737, p. 7-pg., . (11/20711-3, 09/53199-3, 12/02117-0)

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