Size and Shape Effects on the Phase Diagrams of Nickel-Based Bimetallic Nanoalloys

G. Guisbiers, R. Mendoza-Pérez, L. Bazán-Díaz, R. Mendoza-Cruz, J. Jesús Velázquez-Salazar, M. José-Yacamán

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Nickel-based bimetallic nanoalloys (nickel-palladium, nickel-platinum, nickel-rhodium, and nickel-iridium) play an important role in catalysis, electrocatalysis, and magnetic applications. To improve the performance of those materials at the nanoscale, the knowledge of their phase diagrams is critically needed. However, such knowledge is still lacking because calorimetry experiments are extremely challenging to perform at the nanoscale. Then, a smart and necessary alternative to those challenging and time-consuming experiments is to obtain this knowledge from theoretical predictions by using nanothermodynamics. The phase diagrams at the nanoscale for the considered alloys are therefore predicted for various polyhedral shapes, while the nature of the surface segregated element is established by using two segregation rules. Finally, the theoretical results are supported by advanced transmission electron microscopy characterization.

Original languageEnglish (US)
Pages (from-to)6930-6939
Number of pages10
JournalJournal of Physical Chemistry C
Volume121
Issue number12
DOIs
StatePublished - Mar 30 2017
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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