Electrochemistry of ethanol, glycerol and other organic Cn molecules

• Grant number: 18/23443-9
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): December 01, 2018
• Effective date (End): November 30, 2019
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal researcher: Germano Tremiliosi Filho
• Grantee: Nelson Alexandre Galiote Silva
• Home 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

Abstract

The research aims to perform fundamental studies specially on the mechanistic aspects of the electro-oxidation reactions of ethanol, glycerol, and other organic molecules Cn on well-defined single crystal surfaces. It also contemplates the synthesis and characterization of nanostructured electrocatalysts formed by the combination of metals and oxides of noble metals and non-noble catalysts for the oxidation reactions of ethanol, glycerol, and other organic molecules Cn, with and without photon assistance. These electrocatalytic and photoelectrocatalytic studies, in a fundamental level, will involve quantitative determination of the reaction intermediates and products by in situ FTIR spectroscopy, on-line differential electrochemistry mass spectrometry, liquid and ion chromatographies. Gas chromatography also can be employed using electrochemical half-cell with stagnant and flow (under conditions of controlled mass transport) electrolytes. The investigations will include correlations between electrocatalytic and photoelectrocatalytic activity and stability with the composition and structure of the nanoparticles. The applied studies will be carried out in a PEM type unitary fuel cell using electrodes of 5 cm ² feed with ethanol or glycerol at the anode and oxygen at the cathode, for evaluation of current density and energy efficiency. Current distribution measurements will be made in order to improve the conditions of preparation of the membrane electrode assembly (MEA), with the focus on the cell operation conditions. These studies will also involve the quantitative determination of the reaction products using techniques such as mass spectrometry, gas, liquid and ion chromatographies. These operational studies on fuel cells with and without UV light assistance will be carried out on the most active electrocatalysts and photoelectrocatalysts investigated in the previous stages.

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)

BARBOSA, AMAURY F. B.; DEL COLLE, VINICIUS; GALIOTE, NELSON A.; TREMILIOSI-FILHO, GERMANO. Reprint of ``Effect of tin deposition over electrogenerated random defects on Pt(111) surfaces onto ethanol electrooxidation: Electrochemical and FTIR studies{''}. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 875, n. SI, OCT 15 2020. (16/13100-1, 18/23443-9)

ALMEIDA, C. V. S.; GALIOTE, N. A.; EGUILUZ, K. I. B.; SALAZAR-BANDA, G. R.; DEL COLLE, V.; TREMILIOSI-FILHO, G.. Evidence of surface restructuration on Pt-Rh/C and Pt-Rh-Ni/C to ethanol electrooxidation reaction. Electrochimica Acta, v. 351, AUG 10 2020. (18/23443-9, 13/16930-7)

BARBOSA, AMAURY F. B.; DEL COLLE, VINICIUS; GALIOTE, NELSON A.; TREMILIOSI-FILHO, GERMANO. Effect of tin deposition over electrogenerated random defects on Pt(111) surfaces onto ethanol electrooxidation: Electrochemical and FTIR studies. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 857, JAN 15 2020. (16/13100-1, 18/23443-9)