Stability of Porous Platinum Nanoparticles: Combined In Situ TEM and Theoretical Study

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Porous platinum nanoparticles provide a route for the development of catalysts that use less platinum without sacrificing catalytic performance. Here, we examine porous platinum nanoparticles using a combination of in situ transmission electron microscopy and calculations based on a first-principles-parametrized thermodynamic model. Our experimental observations show that the initially irregular morphologies of the as-sythesized porous nanoparticles undergo changes at high temperatures to morphologies having faceted external surfaces with voids present in the interior of the particles. The increasing size of stable voids with increasing temperature, as predicted by the theoretical calculations, shows excellent agreement with the experimental findings. The results indicate that hollow-structured nanoparticles with an appropriate void-to-total-volume ratio can be stable at high temperatures.
Original languageEnglish
JournalJournal of Physical Chemistry Letters
Publication date2012
Volume3
Issue9
Pages1106-1110
ISSN1948-7185
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 5

Keywords

  • Porous particles, In situ TEM, First-principles calculations, Thermal stability
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