Abstract:Anomalous small-angle X-ray scattering (ASAXS) is a powerful technique for probing catalyst particle sizes on the nanometer scale making it ideal for monitoring particle size distributions (PSDs) of Pt-based cathode electrocatalysts for polymer electrolyte fuel cells. Potential cycling experiments were performed on Pt nano-particles in both aqueous and membrane-electrode assembly (MEA) environments. PSDs were resolved through in-situ ASAXS and used to calculate geometric surface areas (GSA) and mass losses. A … Show more
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