Pt Diffusion Dynamics for the Formation Cr–Pt Core–Shell Nanoparticles

G. Gupta, P. Iqbal, F. Yin, J. Liu, R. E. Palmer, S. Sharma, Ken C F Leung, P. M. Mendes*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

14 Citations (Scopus)


Layered core-shell bimetallic Cr-Pt nanoparticles were prepared by the formation and later reduction of an intermediate Pt-ion-containing supramolecular complex onto preformed Cr nanoparticles. The resultant nanoparticles were characterized by X-ray diffraction analysis, transmission electron microscopy, X-ray photoelectron spectroscopy, and aberration-corrected scanning transmission electron microscopy. The results are consistent with the presence of Pt diffusion during or after bimetallic nanoparticle formation, which has resulted in a Pt/Cr-alloyed core and shell. We postulate that such Pt diffusion occurs by an electric-field-assisted process according to Cabrera-Mott theory and that it originates from the low work function of the preformed oxygen-defective Cr nanoparticles and the rather large electron affinity of Pt.

Original languageEnglish
Pages (from-to)6917-6923
Number of pages7
Issue number24
Early online date15 Jun 2015
Publication statusPublished - 23 Jun 2015

Scopus Subject Areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


Dive into the research topics of 'Pt Diffusion Dynamics for the Formation Cr–Pt Core–Shell Nanoparticles'. Together they form a unique fingerprint.

Cite this