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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.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
Nucl Res Ctr Negev, Israel.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0001-5036-2833
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2019 (engelsk)Inngår i: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 58, nr 2, s. 1100-1106Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC , 2019. Vol. 58, nr 2, s. 1100-1106
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Identifikatorer
URN: urn:nbn:se:liu:diva-154693DOI: 10.1021/acs.inorgchem.8b02226ISI: 000456633400018PubMedID: 30608675OAI: oai:DiVA.org:liu-154693DiVA, id: diva2:1292638
Merknad

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]

Tilgjengelig fra: 2019-02-28 Laget: 2019-02-28 Sist oppdatert: 2019-06-28

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