Ab initio insights on the shapes of platinum nanocatalysts.

Catalytic, chemical, optical, and electronic properties of nanocrystals are strongly influenced by their faceting. A variational approach based on quantum mechanical energies is introduced to evaluate stable and metastable shapes of Pt nanocrystals. The method leads to a nanoscale equation of state, which is solved self-consistently. It is found that the surface energy dependence on the lattice parameter is the key factor controlling the equilibrium stability of the crystal shapes. The variational approach, capable of predicting the changes in the hierarchy of crystals' shapes with respect to size, explains experimental results and establishes a new direction to search for better catalysts.

Full Text

Duke Authors

Cited Authors

  • Chepulskii, RV; Curtarolo, S

Published Date

  • January 25, 2011

Published In

Volume / Issue

  • 5 / 1

Start / End Page

  • 247 - 254

PubMed ID

  • 21171575

Electronic International Standard Serial Number (EISSN)

  • 1936-086X

Digital Object Identifier (DOI)

  • 10.1021/nn102570c

Language

  • eng

Citation Source

  • PubMed