Understanding the oxidation behavior of Fe/Ni/Cr and Fe/Cr/Ni core/alloy nanoparticles

Laxmikant Pathade, Tennyson L. Doane, Rahiem Davon Slaton, Mathew M Maye

Research output: Contribution to journalArticle

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Abstract

In this work we describe a method to prepare core/alloy nanoparticles (CA-NPs) based on transition metal alloys with tunable oxidation properties. We investigated the use of chromium and nickel carbonyl based precursors to control shell deposition and thickness at α-Fe cores producing Fe/Cr/Ni and Fe/Ni/Cr CA-NPs. We compared the systems by monitoring resistance to oxidation and found that it is highly dependent on the shell and alloy sequence as well as thickness, with thin Fe/Cr/Ni having the best stainless behavior. The CA-NP growth was monitored by TEM, and composition was assessed by XPS. Oxidation was quantified by both powder XRD and XPS. The results were analyzed in light of alloy miscibility and diffusion, as well as lattice strains and interfacial oxidation rates.

Original languageEnglish (US)
Pages (from-to)22035-22044
Number of pages10
JournalJournal of Physical Chemistry C
Volume120
Issue number38
DOIs
StatePublished - Sep 29 2016

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ASJC Scopus subject areas

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

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