Electrochemical systems away from thermodynamic equilibrium have received great attention in the scientific community, mainly due to the ease with which instabilities emerge and also for simple manipulation of the control parameters. The study of electro-oxidation of small organic molecules is certainly one of the main issues in the research of electrocatalysis due to potential use in systems converters of chemical energy into electricity. In alkaline medium, such systems represent some peculiarities in the dynamic instabilities, when compared with reactions at low pH values. It can be stated that apart from a few isolated experimental observations, very little is currently known about the oscillatory dynamics of such systems, as well as its kinetic properties compared with conventional scheme. This project aims at studying the mechanistic point of view, the oscillatory electro-oxidation of some short-chain polyols on alkaline surfaces on polycrystalline platinum, palladium and gold means. To this end, online chromatographic analysis and electrochemical quartz crystal (NECQ) in situ in conjunction with conventional electrochemical techniques in order to elucidate the mechanism associated with instabilities nanobalança be performed. The combination of electrochemical techniques and High Performance Liquid Chromatography (HPLC) will be online, so it can be made a direct correspondence with the variation of concentration of polyols and their soluble reaction products along the reaction. Among the experimental parameters to be investigated (concentration of the organic molecule, electrolyte, electrical control parameters, among others), will be studied even if the effect of the nature of the alkali cation present in the supporting electrolyte. Experimental studies will be complemented by modeling and numerical simulations.
News published in Agência FAPESP Newsletter about the scholarship: