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Title: Molybdenum-Ruthenium-Carbon Solid-Solution Alloy Nanoparticles: Can They Be Pseudo-Technetium Carbide?
Authors: Okazoe, Shinya
Kusada, Kohei  kyouindb  KAKEN_id  orcid (unconfirmed)
Yoshida, Yukihiro
Maesato, Mitsuhiko
Yamamoto, Tomokazu
Toriyama, Takaaki
Matsumura, Syo
Kawaguchi, Shogo
Kubota, Yoshiki
Nanba, Yusuke
Aspera, Susan Menez
Koyama, Michihisa
Kitagawa, Hiroshi
Author's alias: 岡副, 眞也
草田, 康平
吉田, 幸大
前里, 光彦
北川, 宏
Keywords: Alloys
Electronic structure
Magnetic properties
Issue Date: 8-Nov-2023
Publisher: American Chemical Society (ACS)
Journal title: Journal of the American Chemical Society
Volume: 145
Issue: 44
Start page: 24005
End page: 24011
Abstract: Technetium (Tc), atomic number 43, is an element that humans cannot freely use even in the 21st century because Tc is radioactive and has no stable isotope. In this report, we present molybdenum–ruthenium–carbon solid-solution alloy (Mo_xRu_{1-x}C_y) nanoparticles (NPs) that are expected to have an electronic structure similar to that of technetium carbide (TcC_y). Mo_xRu_{1-x}C_y NPs were synthesized by annealing under a helium/hydrogen atmosphere following thermal decomposition of metal precursors. The obtained NPs had a solid-solution structure in the whole composition range. Mo_xRu_{1-x}C_y with a cubic structure (down to 30 atom % Mo in the metal ratio) showed a superconducting state, and the transition temperature (Tc) increased with increasing Mo composition. The continuous change in Tc across that of TcC_y indicates the continuous control of the electronic structure by solid-solution alloying, leading to pseudo-TcC_y. Density functional theory calculations indicated that the synthesized Mo_{0.53}Ru_{0.47}C_{0.41} has a similar electronic structure to TcC_{0.41}.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in [Journal of the American Chemical Society], Copyright © 2023 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
The full-text file will be made open to the public on 26 October 2024 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1021/jacs.3c06594
PubMed ID: 37883673
Appears in Collections:Journal Articles

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