| Grant number: | 12/21204-0 |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| Start date: | May 01, 2013 |
| End date: | May 31, 2017 |
| Field of knowledge: | Physical Sciences and Mathematics - Chemistry - Physical-Chemistry |
| Principal Investigator: | Hamilton Brandão Varela de Albuquerque |
| Grantee: | Bruno Alarcon Fernandes Previdello |
| Host Institution: | Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| Associated research grant: | 13/16930-7 - ELECTROCATALYSIS V: ELECTROCATALYTIC PROCESSES OF CHEMICAL AND ELECTRICAL ENERGY INTERCONVERSION, AP.TEM |
| Associated scholarship(s): | 14/23073-6 - Ethanol electrooxidation on PtNi nanoparticles: electrocatalysis and non-linear kinetics, BE.EP.PD |
Abstract Many physical-chemistry systems exhibit complex behavior when distant from thermodynamic equilibrium. Multi-stability and oscillatory kinetics, for example, have complex behavior in reactive systems. Electrochemical systems are particularly interesting when it comes to investigations. It is due to the intrinsic simplicity of the experimental manipulation and detailed temporal dynamics associated with electro-oxidation reactions of small organic molecules. This present project proposes the experimental study of temporal self-organization in electro-oxidation reactions of methanol, ethanol and glycerol. The oscillatory kinetics will be investigated on platinum in different acidic mediums (H3PO4, H2SO4 and HClO4). Among the principal experimental parameters to be explored will be to investigate the water ratio effect in the acid concentration range and temperature differences, as well as the surface structure of working electrodes (Pt (111); Pt(100); Pt(110)). The gaseous formation products will also be identified online in some cases with help of a Differential Electrochemical Mass Spectrometry (DEMS) equipment. These results will be accompanied by temporal evolution of certain volatile species at interesting water concentrations and temperatures, both in conventional configuration with electroplated platinum as in massive electrodes case using coupled flowcell. | |
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