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Ultrathin multilayer Sb-SnO2/IrTaOx/TiO2 nanotube arrays as anodes for the selective oxidation of chloride ions.

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Title: Ultrathin multilayer Sb-SnO2/IrTaOx/TiO2 nanotube arrays as anodes for the selective oxidation of chloride ions.
Authors: Lee, Yebin1 (AUTHOR), Park, Yiseul1 (AUTHOR) dewpark@pknu.ac.kr
Source: Journal of Alloys & Compounds. Nov2020, Vol. 840, pN.PAG-N.PAG. 1p.
Subjects: Chloride ions, Anodes, Oxidation, Oxygen evolution reactions, Precious metals, Hypochlorites, Electroforming, Carbon dioxide reduction
Abstract: The oxidation of chloride ions (Cl−) to oxidized chlorine species (chlorine/hypochlorous acid/hypochlorite) is emerging as a promising alternative to the oxygen evolution reaction because it has a lower overpotential than the latter, and can also produce value-added anodic products. Here, an ultrathin multilayer electrode (Sb-SnO 2 /IrTaO x /TiO 2 nanotube (TNT)) has been fabricated by simple dipping and electrodeposition methods for the production of hypochlorous acid by Cl− oxidation. The use of non-noble metal-based electrodes significantly reduced the use of noble metals and increased the selectivity for Cl− oxidation even at the neutral pH and low concentration of NaCl, resulting in the reduction of cost and energy consumption. The nanotube structure of Sb-SnO 2 /IrTaO x /TNT affords an increased active surface area and loading amounts of the catalysts compared to the structure of the flat electrodes, making the Sb-SnO 2 /IrTaO x /TNT more efficient than flat electrodes for Cl− oxidation. The Faradaic efficiency of Sb-SnO 2 /IrTaO x /TNT for Cl− oxidation was ∼95%, indicating that water oxidation was almost suppressed. Compared to the commercial dimensionally stable anode (DSA), the overpotential of Sb-SnO 2 /IrTaO x /TNT for water oxidation is much larger than for Cl− oxidation, therefore, the Sb-SnO 2 /IrTaO x /TNT could exhibit the high selectivity for Cl− oxidation by suppressing the competitive water oxidation. Image 1 • Ultrathin multilayer electrode has been fabricated as an anode for Cl− oxidation. • Sb-SnO 2 /IrTaO x /TiO 2 nanotube reduced the use of noble metals. • Sb-SnO 2 catalyst layer increased the selectivity for Cl− oxidation at neutral pH. • The Faradaic efficiency for Cl− oxidation was ∼95% by suppressing water oxidation at neutral pH. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 143765978
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Ultrathin multilayer Sb-SnO2/IrTaOx/TiO2 nanotube arrays as anodes for the selective oxidation of chloride ions.
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  Data: <searchLink fieldCode="AR" term="%22Lee%2C+Yebin%22">Lee, Yebin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Park%2C+Yiseul%22">Park, Yiseul</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dewpark@pknu.ac.kr</i>
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  Data: <searchLink fieldCode="DE" term="%22Chloride+ions%22">Chloride ions</searchLink><br /><searchLink fieldCode="DE" term="%22Anodes%22">Anodes</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Precious+metals%22">Precious metals</searchLink><br /><searchLink fieldCode="DE" term="%22Hypochlorites%22">Hypochlorites</searchLink><br /><searchLink fieldCode="DE" term="%22Electroforming%22">Electroforming</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide+reduction%22">Carbon dioxide reduction</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The oxidation of chloride ions (Cl−) to oxidized chlorine species (chlorine/hypochlorous acid/hypochlorite) is emerging as a promising alternative to the oxygen evolution reaction because it has a lower overpotential than the latter, and can also produce value-added anodic products. Here, an ultrathin multilayer electrode (Sb-SnO 2 /IrTaO x /TiO 2 nanotube (TNT)) has been fabricated by simple dipping and electrodeposition methods for the production of hypochlorous acid by Cl− oxidation. The use of non-noble metal-based electrodes significantly reduced the use of noble metals and increased the selectivity for Cl− oxidation even at the neutral pH and low concentration of NaCl, resulting in the reduction of cost and energy consumption. The nanotube structure of Sb-SnO 2 /IrTaO x /TNT affords an increased active surface area and loading amounts of the catalysts compared to the structure of the flat electrodes, making the Sb-SnO 2 /IrTaO x /TNT more efficient than flat electrodes for Cl− oxidation. The Faradaic efficiency of Sb-SnO 2 /IrTaO x /TNT for Cl− oxidation was ∼95%, indicating that water oxidation was almost suppressed. Compared to the commercial dimensionally stable anode (DSA), the overpotential of Sb-SnO 2 /IrTaO x /TNT for water oxidation is much larger than for Cl− oxidation, therefore, the Sb-SnO 2 /IrTaO x /TNT could exhibit the high selectivity for Cl− oxidation by suppressing the competitive water oxidation. Image 1 • Ultrathin multilayer electrode has been fabricated as an anode for Cl− oxidation. • Sb-SnO 2 /IrTaO x /TiO 2 nanotube reduced the use of noble metals. • Sb-SnO 2 catalyst layer increased the selectivity for Cl− oxidation at neutral pH. • The Faradaic efficiency for Cl− oxidation was ∼95% by suppressing water oxidation at neutral pH. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jallcom.2020.155622
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Chloride ions
        Type: general
      – SubjectFull: Anodes
        Type: general
      – SubjectFull: Oxidation
        Type: general
      – SubjectFull: Oxygen evolution reactions
        Type: general
      – SubjectFull: Precious metals
        Type: general
      – SubjectFull: Hypochlorites
        Type: general
      – SubjectFull: Electroforming
        Type: general
      – SubjectFull: Carbon dioxide reduction
        Type: general
    Titles:
      – TitleFull: Ultrathin multilayer Sb-SnO2/IrTaOx/TiO2 nanotube arrays as anodes for the selective oxidation of chloride ions.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Lee, Yebin
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          Name:
            NameFull: Park, Yiseul
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          Dates:
            – D: 05
              M: 11
              Text: Nov2020
              Type: published
              Y: 2020
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              Value: 09258388
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              Value: 840
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            – TitleFull: Journal of Alloys & Compounds
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