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Electrocatalysis under oscillatory regime: in situ IR spectroscopy in ATR-SEIRAS configuration

Grant number: 14/08030-9
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): November 01, 2014
Effective date (End): February 28, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Hamilton Brandão Varela de Albuquerque
Grantee:Fabian Hartl
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
Associated scholarship(s):17/07286-8 - Electrocatalysis under oscillatory regime: in situ IR spectroscopy in ATR-SEIRAS configuration and spatiotemporal patterns, BE.EP.DD


Many electrochemical systems are known to present kinetic instabilities under some conditions. In particular during the electro-oxidation of small organic molecules, kinetic instabilities have been recently used to provide mechanistic insights, inaccessible under regular regime. The goal of this proposal is to use in situ surface-enhanced infrared absorption spectroscopy, in the attenuated total reflection mode, to the study of the oscillatory electro-oxidation of small organic molecules and sulfur-containing species. The research plan aims to investigate theses systems on platinum, palladium and gold catalysts, to clarify the role of adsorbates on the dynamics under different constraints. It is crucial to get more information in this challenging topic for a better understanding of the processes during oscillations, not least to improve the performance of catalysis in fuel cells, but to get a general model of mechanisms and kinetics of these systems. (AU)

Scientific publications (6)
(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)
CALDERON-CARDENAS, ALFREDO; HARTL, FABIAN W.; GALLAS, JASON A. C.; VARELA, HAMILTON. Modeling the triple-path electro-oxidation of formic acid on platinum: Cyclic voltammetry and oscillations. CATALYSIS TODAY, v. 359, n. SI, p. 90-98, JAN 1 2021. Web of Science Citations: 6.
HARTL, FABIAN W.; VARELA, HAMILTON; CUESTA, ANGEL. The oscillatory electro-oxidation of formic acid: Insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 840, p. 249-254, MAY 1 2019. Web of Science Citations: 0.
MELLE, GABRIEL B.; HARTL, FABIAN W.; VARELA, HAMILTON; SITTA, ELTON. The effect of solution pH on the oscillatory electro-oxidation of methanol. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 826, p. 164-169, OCT 1 2018. Web of Science Citations: 4.
HARTL, FABIAN W.; VARELA, HAMILTON. The Effect of Solution pH and Temperature on the Oscillatory Electro-Oxidation of Formic Acid on Platinum. CHEMISTRYSELECT, v. 2, n. 27, p. 8679-8685, SEP 21 2017. Web of Science Citations: 3.
HARTL, FABIAN W.; ZULKE, ALANA A.; FONTE, BRUNO J.; VARELA, HAMILTON. Temperature dependence of the evolving oscillations along the electrocatalytic oxidation of methanol. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 800, p. 99-105, SEP 1 2017. Web of Science Citations: 3.
CABELLO, GEMA; DAVOGLIO, ROGERIO A.; HARTL, FABIAN W.; MARCO, JOSE F.; PEREIRA, ERNESTO C.; BIAGGIO, SONIA R.; VARELA, HAMILTON; CUESTA, ANGEL. Microwave-Assisted Synthesis of Pt-Au Nanoparticles with Enhanced Electrocatalytic Activity for the Oxidation of Formic Acid. Electrochimica Acta, v. 224, p. 56-63, JAN 10 2017. Web of Science Citations: 21.

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