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| Naji, M. |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Azam, Siraj |
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| Azevedo, Nuno Monteiro |
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Bitschnau, Brigitte
in Cooperation with on an Cooperation-Score of 37%
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Publications (6/6 displayed)
- 2024INNOVATIVE STRUCTURED OXYGEN CARRIERS FOR ENHANCED GREEN HYDROGEN PRODUCTION
- 2022Ag-MnxOy on Graphene Oxide Derivatives as Oxygen Reduction Reaction Catalyst in Alkaline Direct Ethanol Fuel Cellscitations
- 2019Novel highly active carbon supported ternary PdNiBi nanoparticles as anode catalyst for the alkaline direct ethanol fuel cellcitations
- 2017Bifunctional electrode performance for zinc-air flow cells with pulse chargingcitations
- 2017Ethanol tolerant precious metal free cathode catalyst for alkaline direct ethanol fuel cellscitations
- 2014Order vs. disorder — a huge increase in ionic conductivity of nanocrystalline LiAlO2 embedded in an amorphous-like matrix of lithium aluminatecitations
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article
Ethanol tolerant precious metal free cathode catalyst for alkaline direct ethanol fuel cells
Abstract
La0.7Sr0.3(Fe0.2Co0.8)O3 and La0.7Sr0.3MnO3 based cathode catalysts are synthesized by the sol-gel method. These perovskite cathode catalysts are tested in half cell configuration and compared to MnO2 as reference material in alkaline direct ethanol fuel cells (ADEFCs). The best performing cathode is tested in single cell setup using a standard carbon supported Pt0.4Ru0.2 based anode. A backside Luggin capillary is used in order to register the anode potential during all measurements. Characteristic processes of the electrodes are investigated using electrochemical impedance spectroscopy. Physical characterizations of the perovskite based cathode catalysts are performed with a scanning electron microscope (SEM) and by X-ray diffraction showing phase pure materials. In half cell setup, La0.7Sr0.3MnO3 shows the highest tolerance toward ethanol with a performance of 614 mA cm2 at 0.65 V vs. RHE in 6 M KOH and 1 M EtOH at RT. This catalyst outperforms the state-of-the-art precious metal-free MnO2 catalyst in presence of ethanol. In fuel cell setup, the peak power density is 27.6 mW cm2 at a cell voltage of 0.345 V and a cathode potential of 0.873 V vs. RHE.