Kavli Affiliate: Lena Fitting Kourkoutis
| First 5 Authors: Huolin L. Xin, Julia A. Mundy, Zhongyi Liu, Randi Cabezas, Robert Hovden
| Summary:
The thousandfold increase in data-collection speed enabled by
aberration-corrected optics allows us to overcome an electron microscopy
paradox – how to obtain atomic-resolution chemical structure in individual
nanoparticles, yet record a statistically significant sample from an
inhomogeneous population. This allowed us to map hundreds of Pt-Co
nanoparticles to show atomic-scale elemental distributions across different
stages of the catalyst aging in a proton-exchange-membrane fuel cell, and
relate Pt-shell thickness to treatment, particle size, surface orientation, and
ordering.
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