Selective oxidation of Pd and compositional reconstruction in Pd70Ag30 alloy nanoparticles

Kuan Wen Wang, Shu Ru Chung, Tsong P. Perng

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The Pd70Ag30 alloy nanoparticles were heated in air at 250-450 °C. During heating, segregation of Ag to the surface driven by its lower surface energy competes with the oxidation of Pd. At 250 °C, selective oxidation of Pd occurred preferentially, and the formation of large free Ag crystallites was observed. As temperature increased, oxidation of Pd became more intensive and dominating, which attracted more Pd to the surface for reaction, resulting in fewer and smaller free Ag particles on the surface.

Original languageEnglish
Pages (from-to)60-62
Number of pages3
JournalJournal of Alloys and Compounds
Volume417
Issue number1-2
DOIs
StatePublished - 29 Jun 2006

Keywords

  • Nanocrystalline materials
  • Oxidation
  • Palladium
  • Silver

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