Revealing the atomic restructuring of Pt-Co nanoparticles.
basic_science · Level V
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- Record sourced from PubMed, PMID 24762053.
- Also identified by DOI 10.1021/nl500553a.
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Abstract
We studied Pt-Co bimetallic nanoparticles during oxidation in O2 and reduction in H2 atmospheres using an aberration corrected environmental transmission electron microscope. During oxidation Co migrates to the nanoparticle surface forming a strained epitaxial CoO film. It subsequently forms islands via strain relaxation. The atomic restructuring is captured as a function of time. During reduction cobalt migrates back to the bulk, leaving a monolayer of platinum on the surface.