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- W2325916498 abstract "One of the major aims of this investigation is to fill the gap of the micro-structural organization of ionomer particles and Pt/C aggregates dispersed in a catalyst ink. The dispersion of Nafion® ionomer particles and Pt/C catalyst aggregates in liquid media was studied using ultra small angle x-ray scattering (USAXS) and cryogenic TEM technologies. A systematic approach was taken to study the dispersion of each component (i.e. ionomer particles and Pt/C aggregates) first, then the combination, last the catalyst ink. A multiple curve fitting was used to extract the particle size, size distribution and geometry from scattering data. The results suggest that the particle size, size distribution and geometry of each system are not uniform, rather, vary significantly. The results also indicate that interaction among components (i.e. ionomer particles and Pt/C aggregates) exists. The cryogenic TEM, by which the size and geometry of particles in a liquid can be directly observed, was used to validate the scattering results, which shows the excellent agreement. Based on this study, a methodology of analyzing dispersion of Pt/C particles, Nafion particles in a catalyst ink has been developed and it can serve as a powerful tool for making a desired catalyst ink which is the crtical step for making rational designed MEA." @default.
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- W2325916498 date "2010-10-01" @default.
- W2325916498 modified "2023-09-26" @default.
- W2325916498 title "Investigation of Catalyst Ink Dispersion Using Small Angle X-ray and Small Angle Neutron Scattering" @default.
- W2325916498 doi "https://doi.org/10.1149/1.3484625" @default.
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