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

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

Abstract

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

(7)

(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)

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. (13/16930-7, 17/07286-8, 14/08030-9)

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. (13/16930-7, 13/07296-2, 14/08030-9)

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, p. 9-pg., 2021-01-01. (12/24152-1, 14/08030-9, 13/16930-7)

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. (12/24152-1, 13/16930-7, 14/08030-9)

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. (13/16930-7, 14/08030-9)

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. (14/23916-3, 13/16930-7, 13/07296-2, 14/08030-9)

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. (13/16930-7, 12/21204-0, 09/07629-6, 14/08030-9)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

HARTL, Fabian. The dependence of temperature, the bulk solution pH and other parameters in the electro-oxidation of small organic molecules. 2019. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) São Carlos.