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Title: Nanoporous high-entropy alloy by liquid metal dealloying
Authors: Okulov, A. V.
Joo, S. -H.
Kim, H. S.
Kato, H.
Okulov, I. V.
Issue Date: 2020
Publisher: MDPI AG
Citation: Nanoporous high-entropy alloy by liquid metal dealloying / A. V. Okulov, S. -H. Joo, H. S. Kim, et al. — DOI 10.3390/met10101396 // Metals. — 2020. — Vol. 10. — Iss. 10. — P. 1-7. — 1396.
Abstract: High-entropy nanomaterials possessing high accessible surface areas have demonstrated outstanding catalytic performance, beating that found for noble metals. In this communication, wereport about the synthesis of a new, nanoporous, high-entropy alloy (HEA) possessing open porosity. The nanoporous, high-entropy Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%) was fabricated from a precursor (TaMoNbV)25Ni75 alloy (at%) by liquid metal dealloying using liquid magnesium (Mg). Directly after dealloying, the bicontinuous nanocomposite consisting of a Mg-rich phase and a phase with a bulk-centered cubic (bcc) structure was formed. The Mg-rich phase was removed with a 3M aqueous solution of nitric acid to obtain the open, porous, high-entropy Ta19.1Mo20.5Nb22.9V30Ni7.5 alloy (at%). The ligament size of this nanoporous HEA is about 69 ± 9 nm, indicating the high surface area in this material. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85094603714
PURE ID: 20127178
ISSN: 20754701
DOI: 10.3390/met10101396
metadata.dc.description.sponsorship: This research was funded by the International Collaboration Center, Institute for Materials Research (ICC-IMR), Tohoku University, Japan (no grant number) and the German Science Foundation under the Leibniz Program, grant number MA 3333/13-1.
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