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...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2017-06-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-03509-y |
| _version_ | 1818429624517918720 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-14T15:20:29Z |
| format | Article |
| id | doaj.art-269823b29a654ea5b71eae0ab4a331ea |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-14T15:20:29Z |
| publishDate | 2017-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-269823b29a654ea5b71eae0ab4a331ea2022-12-21T22:56:10ZengNature PortfolioScientific Reports2045-23222017-06-01711910.1038/s41598-017-03509-yHighly conductive nano-sized Magnéli phases titanium oxide (TiOx)Aditya F. Arif0Ratna Balgis1Takashi Ogi2Ferry Iskandar3Akihiro Kinoshita4Keitaro Nakamura5Kikuo Okuyama6Department of Chemical Engineering, Graduate School of Engineering, Hiroshima UniversityDepartment of Chemical Engineering, Graduate School of Engineering, Hiroshima UniversityDepartment of Chemical Engineering, Graduate School of Engineering, Hiroshima UniversityDepartment of Physics, Institut Teknologi BandungResearch Center for Production and Technology, Nisshin Seifun Group Inc.Research Center for Production and Technology, Nisshin Seifun Group Inc.Department of Chemical Engineering, Graduate School of Engineering, Hiroshima UniversityAbstract 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.https://doi.org/10.1038/s41598-017-03509-y |
| spellingShingle | Aditya F. Arif Ratna Balgis Takashi Ogi Ferry Iskandar Akihiro Kinoshita Keitaro Nakamura Kikuo Okuyama Highly conductive nano-sized Magnéli phases titanium oxide (TiOx) Scientific Reports |
| title | 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_short | Highly conductive nano-sized Magnéli phases titanium oxide (TiOx) |
| title_sort | highly conductive nano sized magneli phases titanium oxide tiox |
| url | https://doi.org/10.1038/s41598-017-03509-y |
| 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 |