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Ethanol electrooxidation on PtNi nanoparticles: electrocatalysis and non-linear kinetics

Grant number: 14/23073-6
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): January 01, 2015
Effective date (End): December 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Hamilton Brandão Varela de Albuquerque
Grantee:Bruno Alarcon Fernandes Previdello
Supervisor abroad: Peter Strasser
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Local de pesquisa : Technical University of Berlin (TU), Germany  
Associated to the scholarship:12/21204-0 - Temporal self-organization in electro-oxidation of small organic molecules: surface structure effect, water concentration and temperature, BP.PD

Abstract

A Direct Ethanol Fuel Cell (DEFC) is a device where chemical energy is converted to electricity with a high theoretical efficiency. However, an operating DEFC reaches values lower than expected, compromising its potential commercial applications. This problem is due to a poisoning of the catalysts by the reaction's intermediates, summed to the unfavorable kinetics of the ethanol complete oxidation to carbon dioxide (CO2). Therefore, to devise strategies regarding the deployment of DEFC technology, it is necessary further knowledge of the system. For such, bimetallic catalysts have been employed to study the ethanol electro-oxidation. Despite increases in selectivity for this reaction, no viable catalyst has been developed yet. Then, this project intends to study bimetallic nanoparticulated PtNi catalysts for the electro-oxidation of ethanol. This one is a versatile material, since it is possible to control its geometry, surface properties and particle size depending on the treatment used. Additionally, PtNi nanoparticles have presented promising results for the electro-oxidation of carbon monoxide (CO), one of the intermediates that strongly blocks the catalyst's sites. The electrochemical studies will be performed using different configurations of PtNi in an oscillatory regime, in order to study the reaction's selectivity. Methanol will be used as a probe for better comprehension of the results. (AU)

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)
PREVIDELLO, B. A. F.; FERNANDEZ, P. S.; TREMILIOSI-FILHO, G.; VARELA, H. Probing the surface fine structure through electrochemical oscillations. Physical Chemistry Chemical Physics, v. 20, n. 8, p. 5674-5682, FEB 28 2018. Web of Science Citations: 1.
PREVIDELLO, B. A. F.; FERNANDEZ, P. S.; TREMILIOSI-FILHO, G.; VARELA, H. Oscillatory Electro-oxidation of Methanol on Platinum Single Crystal Electrodes. ELECTROCATALYSIS, v. 7, n. 4, p. 276-279, JUL 2016. Web of Science Citations: 6.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.