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Kinetic instabilities in electrocatalysis: mechanism and spatio-temporal dynamics

Grant number: 09/16449-1
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): April 01, 2010
Effective date (End): March 31, 2013
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Hamilton Brandão Varela de Albuquerque
Grantee:Cristiane Pontes de Oliveira
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:09/07629-6 - Electrocatalysis IV: fundamental and applied aspects of electrocatalytic processes, bio-electrocatalysis and kinetic instabilities, AP.BIOEN.TEM


The emergence of spatial structures in chemical systems results of the interplay between the system's dynamics and the spatial coupling among different locations. As far as the solid/liquid interface is concerned, electrocatalytic reactions such as the oxidation of small organic molecules (C1 and C2), are especially susceptible to undergo kinetic instabilities and are of great interest. This is because studying those far from equilibrium reactions is an interesting alternative, since different reaction steps are simultaneously accessed under certain conditions. The present project deals with the systematic investigation of the complex kinetics associated to adsorption and oxidation processes of small organic molecules such as formic acid, methanol, and ethanol on polycrystalline platinum surfaces. The study will be carried out mainly under oscillatory conditions, by means of conventional electrochemical techniques and the nature of reaction intermediates will be investigated with in situ (surface enhanced infrared absorption spectroscopy and quartz crystal nanobalance) and on line (differential electrochemical mass spectrometry) techniques.

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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)
OLIVEIRA, CRISTIANE P.; LUSSARI, NATALIA V.; SITTA, ELTON; VARELA, HAMILTON. Oscillatory electro-oxidation of glycerol on platinum. Electrochimica Acta, v. 85, p. 674-679, . (09/07629-6, 09/16449-1, 11/07226-9)
SANTOS, ADRIANO L.; NAGAO, RAPHAEL; OLIVEIRA, CRISTIANE P.; DE LIMA, ROBERTO B.; VARELA, HAMILTON. The role of HBF4 in electro-catalysis: Arsenic contamination and anion adsorption. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 660, n. 1, p. 147-152, . (09/07629-6, 07/06037-2, 09/00153-6, 09/16449-1)

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