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  Large-scale Production of Carbon-Supported Cobalt-based Functional Nanoparticles for Oxygen Evolution Reaction

Bähr, A., Petersen, H., & Tüysüz, H. (2021). Large-scale Production of Carbon-Supported Cobalt-based Functional Nanoparticles for Oxygen Evolution Reaction. ChemCatChem, 13(17), 3824-3835. doi:10.1002/cctc.202100594.

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Genre: Journal Article

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 Creators:
Bähr, Alexander1, Author           
Petersen, Hilke2, Author           
Tüysüz, Harun1, Author           
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
2Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              

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Free keywords: cobalt-based nanoparticles; oxygen evolution reaction; sustainable carbon support; tea leaf templating
 Abstract: A series of Co-based nanoparticles supported on activated carbon was synthesized by using waste tea leaves as a template as well as a sustainable carbon source. The crystal structure of the Co particles was adjusted by post-treatments with H2O2, ethanol vapor, and H2, which result in Co3O4, CoO, and metallic Co phases, respectively. After these different treatments, the composite materials consist of small Co-based nanoparticles with an average particle size of 6-14 nm supported on activated carbon with specific surface areas up to 1065 m2 g-1. Correlations between the structure of the materials and their activity for the oxygen evolution reaction (OER) were established, whereby the post-treatment with ethanol vapor was found to yield the most effective electrocatalyst. The material shows good stability at 10 mA cm-2 over 10 hours and reaches a mass activity of 2.9 A mgCo-1, which is even higher than pristine ordered mesoporous Co3O4. The superior electrocatalytic performance is ascribed to a high dispersion of Co-based nanoparticles and the conductivity of the activated carbon that facilitate the charge transport.

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Language(s): eng - English
 Dates: 2021-04-232021-07-012021-09-07
 Publication Status: Published online
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cctc.202100594
 Degree: -

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Title: ChemCatChem
  Abbreviation : ChemCatChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 13 (17) Sequence Number: - Start / End Page: 3824 - 3835 Identifier: ISSN: 1867-3880
CoNE: https://pure.mpg.de/cone/journals/resource/1867-3880