1. Internal Currents, CO2 Emissions and Decrease of the Pt Electrochemical Surface Area during Fuel Cell Start-Up and Shut-Down
- Author
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Adrien Lamibrac, Gaël Maranzana, Joseph D. Fairweather, Rodney L. Borup, Olivier Lottin, Sophie Didierjean, Jérôme Dillet, Rangachary Mukundan, Dusan Spernjak, Julien Durst, Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and Los Alamos National Laboratory (LANL)
- Subjects
Hydrogen ,Analytical chemistry ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Residence time (fluid dynamics) ,Electrochemistry ,01 natural sciences ,7. Clean energy ,Nitrogen ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,[SPI]Engineering Sciences [physics] ,chemistry ,law ,Electrode ,0210 nano-technology ,Carbon - Abstract
International audience; This work explores the links between internal currents measured during fuel cell start-up (SU) and shut-down (SD) and the CO2 emissions in the cathode exhaust gases associated with the oxidation of the electrode carbon support. The total charge exchanged between the active and passive regions of a cell appears to be a function of the common residence time of air (or nitrogen) and hydrogen in the anode compartment during SU/SD operation. Both the CO2 emissions and the charges exchanged between the active and passive regions of the cell increase with this residence time. However, the complete oxidation of carbon to CO2 does not seem to be the main contribution to the reverse currents.
- Published
- 2013
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