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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Modeling the triple-path electro-oxidation of formic acid on platinum: Cyclic voltammetry and oscillations

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Calderon-Cardenas, Alfredo [1, 2] ; Hartl, Fabian W. [1] ; Gallas, Jason A. C. [3, 4, 5] ; Varela, Hamilton [1, 3]
Total Authors: 4
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Narino, GIFBA, San Juan De Pasto 1175, Narino - Colombia
[3] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden - Germany
[4] Inst Altos Estudos Paraiba, Rua Silvino Lopes 419-2502, BR-58039190 Joao Pessoa, Paraiba - Brazil
[5] Complex Sci Ctr, 9225 Collins Ave Suite 1208, Surfside, FL 33154 - USA
Total Affiliations: 5
Document type: Journal article
Source: CATALYSIS TODAY; v. 359, n. SI, p. 90-98, JAN 1 2021.
Web of Science Citations: 6

A renewed electrochemical model for the oscillatory electro-oxidation of formic acid on platinum in acidic medium is presented. The model includes recently reported mechanistic findings and evaluates three reaction pathways towards the production of CO2. Two of these processes consist of dehydrogenation and dehydration of the formic acid with adsorbed formate species as common intermediate. The third and most active pathway includes a fast oxidation of the formate ion. The proposed mechanism is translated into a kinetic model and tested in numerical simulations under voltammetric and oscillatory regimes. Numerical results are further compared with experimental ones. A successful adjustment of the oscillatory characteristics, namely frequency and amplitude of the oscillations suggest a good approximation to the actual mechanism of the oxidation of formic acid on platinum. The role of electrochemical oscillations in mechanistic studies is discussed and a comparison with previous models is also provided. Finally, some perspectives are suggested. (AU)

FAPESP's process: 14/08030-9 - Electrocatalysis under oscillatory regime: in situ IR spectroscopy in ATR-SEIRAS configuration
Grantee:Fabian Hartl
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 12/24152-1 - Complex kinetics in electrochemical systems: mechanisms, stoichiometric network analysis and numerical simulations
Grantee:Hamilton Brandão Varela de Albuquerque
Support type: Scholarships abroad - Research
FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
Grantee:Edson Antonio Ticianelli
Support type: Research Projects - Thematic Grants