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Atomic-Resolution Spectroscopic Imaging of Ensembles of Nanocatalyst Particles Across the Life of a Fuel Cell

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type , Journal 07 Dec 2011Embargo end date: 01 Jan 2011Publisher:American Chemical Society (ACS)Journal:Nano Letters, volume 12, pages 490-497 (issn: 1530-6984, eissn: 1530-6992,

Authors: Junliang Zhang; David A. Muller; Lena F. Kourkoutis; Julia A. Mundy; Frederick T. Wagner; Robert Hovden; Randi Cabezas; +4 Authors

doi: 10.1021/nl203975u , 10.48550/arxiv.1111.6697

pmid: 22122715

arXiv: http://arxiv.org/abs/1111.6697 , 1111.6697

Atomic-Resolution Spectroscopic Imaging of Ensembles of Nanocatalyst Particles Across the Life of a Fuel Cell

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Abstract

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.

28 pages, 5 figures, accepted, nano letters

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Keywords

Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Bioelectric Energy Sources, Spectrum Analysis, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Image Enhancement, Microscopy, Atomic Force, Catalysis, Nanostructures, Materials Testing, Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	161
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 1%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 1%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 1%