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- W2017618318 abstract "cell DMFC stack was fabricated and operated with the load of 4 A for 4000 hrs. After 4000 hrs opera- tion peak power density of the stack reduced by 27.3%. Two of the five cells did now show performance degradation, the performance of other two was reduced by 40% and the performance of the other decreased by 60%. The amount of performance degradation of each cell by long-term operation did not correlate with the position in the stack. Platinum particle size in the anode catalyst layer of the MEA with the strongest degradation increased and the increase was severer on the position of methanol inlet than on the position of methanol outlet. However, platinum particle size in the cathode catalyst layers did not changed for all the MEA's. Ruthenium crossover from the anode catalyst layer to the cathode catalyst layer through the membrane was observed after 4,000 hrs operation by SEM-EDX and it occurred for all MEA's regardless of the degree of performance degradation. Atomic ratio of ruthenium to platinum in the cathode catalyst layer was the highest in the MEA with the strongest performance degradation" @default.
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- W2017618318 date "2011-12-01" @default.
- W2017618318 modified "2023-09-26" @default.
- W2017618318 title "Diagnosis of Performance Degradation of Direct Methanol Fuel Cell Stack after Long-Term Operation" @default.
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- W2017618318 doi "https://doi.org/10.9713/kcer.2011.49.6.775" @default.
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