Stability of porous platinum nanoparticles: Combined in situ TEM and theoretical study

Lan-Yun Chang, Amanda S. Barnard, Christian Dwyer, Thomas W. Hansen, Jakob B. Wagner, Rafal E. Dunin-Borkowski, Matthew Weyland, Hiromi Konishi, Huifang Xu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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 (US)
Pages (from-to)1106-1110
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume3
Issue number9
DOIs
StatePublished - May 3 2012
Externally publishedYes

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Platinum
platinum
Nanoparticles
Transmission electron microscopy
voids
nanoparticles
transmission electron microscopy
Temperature
hollow
routes
Thermodynamics
catalysts
thermodynamics
Catalysts
temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Stability of porous platinum nanoparticles : Combined in situ TEM and theoretical study. / Chang, Lan-Yun; Barnard, Amanda S.; Dwyer, Christian; Hansen, Thomas W.; Wagner, Jakob B.; Dunin-Borkowski, Rafal E.; Weyland, Matthew; Konishi, Hiromi; Xu, Huifang.

In: Journal of Physical Chemistry Letters, Vol. 3, No. 9, 03.05.2012, p. 1106-1110.

Research output: Contribution to journalArticle

Chang, L-Y, Barnard, AS, Dwyer, C, Hansen, TW, Wagner, JB, Dunin-Borkowski, RE, Weyland, M, Konishi, H & Xu, H 2012, 'Stability of porous platinum nanoparticles: Combined in situ TEM and theoretical study', Journal of Physical Chemistry Letters, vol. 3, no. 9, pp. 1106-1110. https://doi.org/10.1021/jz3001823
Chang, Lan-Yun ; Barnard, Amanda S. ; Dwyer, Christian ; Hansen, Thomas W. ; Wagner, Jakob B. ; Dunin-Borkowski, Rafal E. ; Weyland, Matthew ; Konishi, Hiromi ; Xu, Huifang. / Stability of porous platinum nanoparticles : Combined in situ TEM and theoretical study. In: Journal of Physical Chemistry Letters. 2012 ; Vol. 3, No. 9. pp. 1106-1110.
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