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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Huang, Hong
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2016The influence of microstructure and functional-grading on the electrochemical response of Pt/Yttria-stabilized zirconia nanocomposite thin films in micro-solid oxide fuel cellscitations
- 2015Microstructures of Reduced Graphene Oxide/Sulfur Nanocomposites and Their Impacts on Lithium Storage Performancescitations
- 2011Synthesis and Characteristics of Nano-Ceria Supported Bimetallic Catalysts For S-Tolerant SOFCs
- 2010Increased Cathodic Kinetics on Platinum in IT-SOFCs by Inserting Highly Ionic-Conducting Nanocrystalline Materialscitations
- 2007Oxygen Reduction Characteristics on Ag, Pt, and Ag-Pt Alloys in Low-Temperature SOFCscitations
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article
Oxygen Reduction Characteristics on Ag, Pt, and Ag-Pt Alloys in Low-Temperature SOFCs
Abstract
<jats:p>Oxygen reduction reactions on Pt, Ag, and Pt-Ag alloys were investigated at temperatures between 300oC and 500oC with the help of electrochemical impedance spectroscopy. The rate-determining step in oxygen reduction reactions was found to depend on the choice of material as well as porosity and thickness. On 600nm dense Ag, dissociative adsorption/reduction of oxygen was dominant. On porous Pt charge transfer reaction in the vicinity of triple phase boundary is rate determining. Slow oxygen diffusion was rate dominant with 600nm dense Ag3Pt. I-V characterization was also performed at 350oC on fuel cells consisting of different metal cathodes. Silver-based alloys were found not suitable as cathodic catalysts for low temperature solid oxide fuel cells due to formation of silver oxide, in turn leading to a rapid decline in voltage with increasing current densities. Among the investigated metals, thin porous Pt was identified as the best cathode.</jats:p>