Understanding the Oxidation Behavior of Fe/Ni/Cr and Fe/Cr/Ni Core/Alloy Nanoparticles
| Autor: | Laxmikant Pathade, Rahiem Davon Slaton, Tennyson L. Doane, Mathew M. Maye |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Nickel Carbonyl Alloy Nanoparticle chemistry.chemical_element 02 engineering and technology Powder xrd engineering.material 010402 general chemistry 01 natural sciences Miscibility Chromium X-ray photoelectron spectroscopy Transition metal Physical and Theoretical Chemistry Metallurgy technology industry and agriculture equipment and supplies 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Chemical engineering chemistry engineering 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 120:22035-22044 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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