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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.)

Coupled Dynamics of Anode and Cathode in Proton-Exchange Membrane Fuel Cells

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Author(s):
Nogueira, Jessica A. [1] ; Krischer, Katharina [2] ; Varela, Hamilton [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Chem Sao Carlos, POB 780, BR-13560970 Sao Carlos, SP - Brazil
[2] Tech Univ Munich, Dept Phys, James Franck Str 1, D-85748 Garching - Germany
Total Affiliations: 2
Document type: Journal article
Source: ChemPhysChem; v. 20, n. 22, SI AUG 2019.
Web of Science Citations: 0
Abstract

An external reference electrode was used to monitor individually the evolution of the anodic and cathodic potentials during the stationary as well as oscillatory operation of a Direct Formic Acid Fuel Cell (DFAFC) and a Direct Methanol Fuel Cell (DMFC). Besides evidencing the large activation loss in both cells, we were able to observe how the oscillatory operation of such devices affects their cathodes. In fact, cathodic oscillations synchronized with the cell voltage dynamics were observed, hitherto never reported on fuel cells. We have addressed these phenomena taking into account two main coupling processes: through the proton concentration and a global coupling stemming from the control mode (potentiostatic or galvanostatic). (AU)

FAPESP's process: 15/09295-9 - Dynamic behavior in low-temperature fuel cells based on oxidation of small organic molecules
Grantee:Jéssica Alves Nogueira
Support type: Scholarships in Brazil - Doctorate
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
FAPESP's process: 17/17644-9 - Stability of electrocatalysts towards the electro-oxidation of organic molecules
Grantee:Jéssica Alves Nogueira
Support type: Scholarships abroad - Research Internship - Doctorate