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A Tungsten-Based Nanolaminated Ternary Carbide: (W,Ti)(4)C4-x
Drexel Univ, PA 19104 USA; Drexel Univ, PA 19104 USA.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Nucl Res Ctr Negev, Israel.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-5036-2833
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2019 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 58, no 2, p. 1100-1106Article in journal (Refereed) Published
Abstract [en]

Nanolamellar transition metal carbides are gaining increasing interests because of the recent developments of their twodimensional (2D) derivatives and promising performance for a variety of applications from energy storage, catalysis to transparent conductive coatings, and medicine. To develop more novel 2D materials, new nanolaminated structures are needed. Here we report on a tungsten based nanolaminated ternary phase, (W,Ti)(4)C4-x, synthesized by an Al catalyzed reaction of W, Ti, and C powders at 1600 degrees C for 4 h, under flowing argon. X-ray and neutron diffraction, along with Z-contrast scanning transmission electron microscopy, were used to determine the atomic structure, ordering, and occupancies. This phase has a layered hexagonal structure (P6(3)/mmc) with lattice parameters, a = 3.00880(7) angstrom, and c = 19.5633(6) angstrom and a nominal chemistry of (W,Ti)(4)C4-x (actual chemistry, W2.1(1)Ti1.6(1)C2.6(1)). The structure is comprised of layers of pure W that are also twin planes with two adjacent atomic layers of mixed W and Ti, on either side. The use of Al as a catalyst for synthesizing otherwise difficult to make phases, could in turn lead to the discovery of a large family of nonstoichiometric ternary transition metal carbides, synthesized at relatively low temperatures and shorter times.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2019. Vol. 58, no 2, p. 1100-1106
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-154693DOI: 10.1021/acs.inorgchem.8b02226ISI: 000456633400018PubMedID: 30608675OAI: oai:DiVA.org:liu-154693DiVA, id: diva2:1292638
Note

Funding Agencies|Swedish Foundation for Strategic Research (SSF) through a Synergy Grant; Knut and Alice Wallenberg (KAW) Foundation [KAW 2015.0043]; Swedish Research Council [642-2013-8020, 621-2014-4890]

Available from: 2019-02-28 Created: 2019-02-28 Last updated: 2019-06-28

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The full text will be freely available from 2020-01-04 16:13
Available from 2020-01-04 16:13

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Lu, JunDahlqvist, MartinHalim, JosephRosén, JohannaHultman, Lars
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