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Intrinsic photoelectrocatalytic activity in oriented, photonic TiO2 nanotubes.

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Title: Intrinsic photoelectrocatalytic activity in oriented, photonic TiO2 nanotubes.
Authors: Fleischer, Christian1, Chatzitakis, Athanasios1 a.e.chatzitakis@smn.uio.no, Norby, Truls1
Source: Materials Science in Semiconductor Processing. Dec2018, Vol. 88, p186-191. 6p.
Subjects: Titanium catalyst activity, Titanium oxide nanotubes, Electrocatalysis, Semiconductors, Impedance spectroscopy, Photocatalysts
Abstract: Abstract In this work, we grow oriented photonic TiO 2 nanotubes (TNTs) with a well-established anodization method and their intrinsic catalytic and electronic properties are studied by means of (photo)electrochemical methods. The oriented photonic TNTs are assessed by the R ct C dl (ΩF) product, which is a measure of the intrinsic photoelectrocatalytic activity (IPA) of the material. The R ct C dl product decouples any surface area effects and it can be applied at any potential and accompanied reaction without knowing the actual electrochemically active surface area (EASA). Moreover, electrochemical impedance spectroscopy (EIS) is used in order to investigate the frequency dispersion in the single frequency Mott-Schottky (MS) measurement. The choice of frequency and the frequency dispersion in MS measurements in nanostructured and of high surface area semiconductors are rarely addressed and can result in erroneous values of two important parameters, i.e. flat band position and donor or acceptor densities. This work provides further insights into important electrochemical aspects and catalytic properties of high surface area nanomaterials for photoelectrochemical applications. Graphical abstract fx1 [ABSTRACT FROM AUTHOR]
Copyright of Materials Science in Semiconductor Processing is the property of Pergamon Press - An Imprint of Elsevier Science 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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Header DbId: egs
DbLabel: Engineering Source
An: 131592361
AccessLevel: 6
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PubTypeId: academicJournal
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  Data: Intrinsic photoelectrocatalytic activity in oriented, photonic TiO2 nanotubes.
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  Data: <searchLink fieldCode="AR" term="%22Fleischer%2C+Christian%22">Fleischer, Christian</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chatzitakis%2C+Athanasios%22">Chatzitakis, Athanasios</searchLink><relatesTo>1</relatesTo><i> a.e.chatzitakis@smn.uio.no</i><br /><searchLink fieldCode="AR" term="%22Norby%2C+Truls%22">Norby, Truls</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+in+Semiconductor+Processing%22">Materials Science in Semiconductor Processing</searchLink>. Dec2018, Vol. 88, p186-191. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Titanium+catalyst+activity%22">Titanium catalyst activity</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+oxide+nanotubes%22">Titanium oxide nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Electrocatalysis%22">Electrocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Semiconductors%22">Semiconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Impedance+spectroscopy%22">Impedance spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysts%22">Photocatalysts</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract In this work, we grow oriented photonic TiO 2 nanotubes (TNTs) with a well-established anodization method and their intrinsic catalytic and electronic properties are studied by means of (photo)electrochemical methods. The oriented photonic TNTs are assessed by the R ct C dl (ΩF) product, which is a measure of the intrinsic photoelectrocatalytic activity (IPA) of the material. The R ct C dl product decouples any surface area effects and it can be applied at any potential and accompanied reaction without knowing the actual electrochemically active surface area (EASA). Moreover, electrochemical impedance spectroscopy (EIS) is used in order to investigate the frequency dispersion in the single frequency Mott-Schottky (MS) measurement. The choice of frequency and the frequency dispersion in MS measurements in nanostructured and of high surface area semiconductors are rarely addressed and can result in erroneous values of two important parameters, i.e. flat band position and donor or acceptor densities. This work provides further insights into important electrochemical aspects and catalytic properties of high surface area nanomaterials for photoelectrochemical applications. Graphical abstract fx1 [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science in Semiconductor Processing is the property of Pergamon Press - An Imprint of Elsevier Science 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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    Identifiers:
      – Type: doi
        Value: 10.1016/j.mssp.2018.08.009
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 186
    Subjects:
      – SubjectFull: Titanium catalyst activity
        Type: general
      – SubjectFull: Titanium oxide nanotubes
        Type: general
      – SubjectFull: Electrocatalysis
        Type: general
      – SubjectFull: Semiconductors
        Type: general
      – SubjectFull: Impedance spectroscopy
        Type: general
      – SubjectFull: Photocatalysts
        Type: general
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      – TitleFull: Intrinsic photoelectrocatalytic activity in oriented, photonic TiO2 nanotubes.
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            NameFull: Fleischer, Christian
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            NameFull: Chatzitakis, Athanasios
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            NameFull: Norby, Truls
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            – D: 01
              M: 12
              Text: Dec2018
              Type: published
              Y: 2018
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              Value: 88
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            – TitleFull: Materials Science in Semiconductor Processing
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