Carbothermal shock synthesis of high-entropy-alloy nanoparticles
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- 30 March 2018
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 359 (6383), 1489-1494
- https://doi.org/10.1126/science.aan5412
Abstract
The controllable incorporation of multiple immiscible elements into a single nanoparticle merits untold scientific and technological potential, yet remains a challenge using conventional synthetic techniques. We present a general route for alloying up to eight dissimilar elements into single-phase solid-solution nanoparticles, referred to as high-entropy-alloy nanoparticles (HEA-NPs), by thermally shocking precursor metal salt mixtures loaded onto carbon supports [temperature ~2000 kelvin (K), 55-millisecond duration, rate of ~105 K per second]. We synthesized a wide range of multicomponent nanoparticles with a desired chemistry (composition), size, and phase (solid solution, phase-separated) by controlling the carbothermal shock (CTS) parameters (substrate, temperature, shock duration, and heating/cooling rate). To prove utility, we synthesized quinary HEA-NPs as ammonia oxidation catalysts with ~100% conversion and >99% nitrogen oxide selectivity over prolonged operations.Keywords
Funding Information
- National Science Foundation (CMMI-1619743)
- National Science Foundation (DMR-1410636)
- National Science Foundation (DMR-0959470)
- U.S. Department of Defense (National Defense Science and Engineering Graduate (NDSEG) Fellowship)
- Office of Naval Research (ONR-MURI)
This publication has 41 references indexed in Scilit:
- Finely controlled multimetallic nanocluster catalysts for solvent-free aerobic oxidation of hydrocarbonsScience Advances, 2017
- Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysisScience, 2016
- Bimetallic Nanocrystals: Syntheses, Properties, and ApplicationsChemical Reviews, 2016
- Polyelemental nanoparticle librariesScience, 2016
- High-performance transition metal–doped Pt 3 Ni octahedra for oxygen reduction reactionScience, 2015
- Heterogeneous nucleation and shape transformation of multicomponent metallic nanostructuresNature Materials, 2014
- Interfacial Effects in Iron-Nickel Hydroxide–Platinum Nanoparticles Enhance Catalytic OxidationScience, 2014
- A total-synthesis framework for the construction of high-order colloidal hybrid nanoparticlesNature Chemistry, 2011
- Synthesis and Optical Properties of Hybrid and Alloy Plasmonic NanoparticlesChemical Reviews, 2011
- Magnetic nanoparticles: synthesis, functionalization, and applications in bioimaging and magnetic energy storageChemical Society Reviews, 2009