Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)

Abstract Despite the strong recent revival of Magnéli phase TiOx as a promising conductive material, synthesis of Magnéli phase TiOx nanoparticles has been a challenge because of the heavy sintering nature of TiO2 at elevated temperatures. We have successfully synthesized chain-structured Magnéli ph...

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Autores principales:	Aditya F. Arif, Ratna Balgis, Takashi Ogi, Ferry Iskandar, Akihiro Kinoshita, Keitaro Nakamura, Kikuo Okuyama
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/269823b29a654ea5b71eae0ab4a331ea
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spelling	oai:doaj.org-article:269823b29a654ea5b71eae0ab4a331ea2021-12-02T12:30:37ZHighly conductive nano-sized Magnéli phases titanium oxide (TiOx)10.1038/s41598-017-03509-y2045-2322https://doaj.org/article/269823b29a654ea5b71eae0ab4a331ea2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03509-yhttps://doaj.org/toc/2045-2322Abstract Despite the strong recent revival of Magnéli phase TiOx as a promising conductive material, synthesis of Magnéli phase TiOx nanoparticles has been a challenge because of the heavy sintering nature of TiO2 at elevated temperatures. We have successfully synthesized chain-structured Magnéli phases TiOx with diameters under 30 nm using a thermal-induced plasma process. The synthesized nanoparticles consisted of a mixture of several Magnéli phases. A post-synthesis heat-treatment was performed to reduce the electrical resistivity without changing the particle morphology. The resistivity of the heat-treated particle was as low as 0.04 Ω.cm, with a specific surface area of 52.9 m2 g−1. The effects of heat-treatment on changes in the crystal structure and their correlation with the electron conductivity are discussed based on transmission electron microscopy images, X-ray diffraction spectra, and X-ray adsorption fine structure spectra. Electrochemical characterization using cyclic voltammetry and potentiodynamic scan shows a remarkable electrochemical stability in a strongly oxidizing environment.Aditya F. ArifRatna BalgisTakashi OgiFerry IskandarAkihiro KinoshitaKeitaro NakamuraKikuo OkuyamaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Aditya F. Arif Ratna Balgis Takashi Ogi Ferry Iskandar Akihiro Kinoshita Keitaro Nakamura Kikuo Okuyama Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)
description	Abstract Despite the strong recent revival of Magnéli phase TiOx as a promising conductive material, synthesis of Magnéli phase TiOx nanoparticles has been a challenge because of the heavy sintering nature of TiO2 at elevated temperatures. We have successfully synthesized chain-structured Magnéli phases TiOx with diameters under 30 nm using a thermal-induced plasma process. The synthesized nanoparticles consisted of a mixture of several Magnéli phases. A post-synthesis heat-treatment was performed to reduce the electrical resistivity without changing the particle morphology. The resistivity of the heat-treated particle was as low as 0.04 Ω.cm, with a specific surface area of 52.9 m2 g−1. The effects of heat-treatment on changes in the crystal structure and their correlation with the electron conductivity are discussed based on transmission electron microscopy images, X-ray diffraction spectra, and X-ray adsorption fine structure spectra. Electrochemical characterization using cyclic voltammetry and potentiodynamic scan shows a remarkable electrochemical stability in a strongly oxidizing environment.
format	article
author	Aditya F. Arif Ratna Balgis Takashi Ogi Ferry Iskandar Akihiro Kinoshita Keitaro Nakamura Kikuo Okuyama
author_facet	Aditya F. Arif Ratna Balgis Takashi Ogi Ferry Iskandar Akihiro Kinoshita Keitaro Nakamura Kikuo Okuyama
author_sort	Aditya F. Arif
title	Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)
title_short	Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)
title_full	Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)
title_fullStr	Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)
title_full_unstemmed	Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)
title_sort	highly conductive nano-sized magnéli phases titanium oxide (tiox)
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/269823b29a654ea5b71eae0ab4a331ea
work_keys_str_mv	AT adityafarif highlyconductivenanosizedmagneliphasestitaniumoxidetiox AT ratnabalgis highlyconductivenanosizedmagneliphasestitaniumoxidetiox AT takashiogi highlyconductivenanosizedmagneliphasestitaniumoxidetiox AT ferryiskandar highlyconductivenanosizedmagneliphasestitaniumoxidetiox AT akihirokinoshita highlyconductivenanosizedmagneliphasestitaniumoxidetiox AT keitaronakamura highlyconductivenanosizedmagneliphasestitaniumoxidetiox AT kikuookuyama highlyconductivenanosizedmagneliphasestitaniumoxidetiox
_version_	1718394323327778816

Highly conductive nano-sized Magnéli phases titanium oxide (TiOx)

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