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  Electrochemical Degradation of Multiwall Carbon Nanotubes at High Anodic Potential for Oxygen Evolution in Acidic Media

Yi, Y., Tornow, J., Willinger, E., Willinger, M. G., Ranjan, C., & Schlögl, R. (2015). Electrochemical Degradation of Multiwall Carbon Nanotubes at High Anodic Potential for Oxygen Evolution in Acidic Media. ChemElectroChem, 2(12), 1929-1937. doi:10.1002/celc.201500268.

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 Creators:
Yi, Youngmi1, 2, Author           
Tornow, Julian1, Author           
Willinger, Elena1, Author           
Willinger, Marc Georg1, 2, Author           
Ranjan, Chinmoy2, Author
Schlögl, Robert1, 2, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Department of Heterogeneous Catalysis, Max-Planck-Institute for Chemical Energy Conversion, Stiftstarsse 34-36, 45470 Mülheim a.d. Ruhr (Germany), ou_persistent22              

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Free keywords: carbon oxidation;electrochemical degradation;electrode stability;multiwall carbon nanotubes;oxygen evolution
 Abstract: There is great interest in electrochemical water splitting for the efficient utilization of sustainable energy. As an alternative to high-priced materials, carbon offers considerable potential. However, carbon is limited as an electrode material for the oxygen evolution reaction (OER), owing to its thermodynamic instability against electrochemical oxidation. In this study, we investigated the electrochemical degradation of multiwall carbon nanotubes (MWCNTs) under the acidic OER environment. Electrochemical oxidation of MWCNTs induces structural changes and the formation of oxygen-containing functional groups on the carbon surface. As a consequence, the electrochemical and physicochemical properties of the MWCNTs are changed during electrochemical oxidation. We carried out electrochemical, microstructural, and spectroscopic analysis to investigate the degradation of MWCNTs. By changing of the electrochemical properties of MWCNTs during the oxidation process, the carbon electrode is initially activated and can then be kinetically stabilized with prolonged oxidation under the OER conditions.

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Language(s): eng - English
 Dates: 2015-06-232015-08-062015-08-192015-12
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/celc.201500268
 Degree: -

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Title: ChemElectroChem
  Abbreviation : ChemElectroChem
Source Genre: Journal
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Publ. Info: Weinheim, Germany : WILEY-VCH Verlag GmbH & Co. KGaA
Pages: 9 Volume / Issue: 2 (12) Sequence Number: - Start / End Page: 1929 - 1937 Identifier: ISSN: 2196-0216
CoNE: https://pure.mpg.de/cone/journals/resource/2196-0216