Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Electrochemical Anodic Formation of VO2 Nanotubes and Hydrogen Sorption Property

  • Lee, Hyeonkwon (Research Institute of Environmental Science & Technology, Kyungpook National University) ;
  • Jung, Minji (Department of Energy Engineering, Gyeongnam National University of Science and Technology (GNTECH)) ;
  • Oh, Hyunchul (Department of Energy Engineering, Gyeongnam National University of Science and Technology (GNTECH)) ;
  • Lee, Kiyoung (Research Institute of Environmental Science & Technology, Kyungpook National University)
  • Received : 2020.08.12
  • Accepted : 2020.10.28
  • Published : 2021.05.28
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Abstract

We investigated the feasibility of hydrogen storage with electrochemically formed VO2 nanotubes. The VO2 nanotubes were fabricated through the anodization of vanadium metal in fluoride ion-containing organic electrolyte followed by an annealing process in an Ar-saturated atmosphere at 673 K for 3 h at a heating rate of 3 K /min. During anodization, the current density significantly increased up to 7.93 mA/cm2 for approximately 500 s owing to heat generation, which led to a fast-electrochemical etching reaction of the outermost part of the nanotubes. By controlling the anodization temperature, highly ordered VO2 nanotubes were grown on the metal substrate without using any binders or adhesives. Furthermore, we demonstrated the hydrogen sorption properties of the anodic VO2 nanotubes.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2018R1A6A1A03024962. NRF-2019M3E6A1103980).

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