Atomic-resolution spectroscopic imaging of ensembles of nanocatalyst particles across the life of a fuel cell.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22122715.
- Also identified by DOI 10.1021/nl203975u.
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Abstract
The thousand-fold 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.
Medical subject headings
- Bioelectric Energy Sources
- Image Enhancement
- Materials Testing
- Microscopy, Atomic Force
- Nanostructures
- Spectrum Analysis