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

doi:10.1021/acs.jpcc.6b06926

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

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 language	English (US)
Pages (from-to)	22035-22044
Number of pages	10
Journal	Journal of Physical Chemistry C
Volume	120
Issue number	38
DOIs	https://doi.org/10.1021/acs.jpcc.6b06926
State	Published - Sep 29 2016

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.6b06926

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title = "Understanding the oxidation behavior of Fe/Ni/Cr and Fe/Cr/Ni core/alloy nanoparticles",

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.",

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T1 - Understanding the oxidation behavior of Fe/Ni/Cr and Fe/Cr/Ni core/alloy nanoparticles

AU - Pathade, Laxmikant

AU - Doane, Tennyson L.

AU - Slaton, Rahiem Davon

AU - Maye, Mathew M.

PY - 2016/9/29

Y1 - 2016/9/29

N2 - 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.

AB - 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.

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

Abstract

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