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  Nitrogen-Doped Mesostructured Carbon-Supported Metallic Cobalt Nanoparticles for Oxygen Evolution Reaction

Bähr, A., Moon, G.-H., & Tüysüz, H. (2019). Nitrogen-Doped Mesostructured Carbon-Supported Metallic Cobalt Nanoparticles for Oxygen Evolution Reaction. ACS Applied Energy Materials, 2(9), 6672-6680. doi:10.1021/acsaem.9b01183.

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Genre: Journal Article

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 Creators:
Bähr, Alexander1, Author           
Moon, Gun-Hee1, Author           
Tüysüz, Harun1, Author           
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              

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Free keywords: mesostructured carbon; pore confinement; soft-templating; nitrogen doping; metallic cobalt; oxygen evolution reaction
 Abstract: A series of metallic cobalt nanoparticles supported on mesostructured nitrogen-doped carbons was successfully synthesized through soft-templating by using poly(ethylene oxide)-b-polystyrene (PEO-b-PS) as a structure directing agent. The formation of metallic cobalt nanoparticles and nitrogen-doping into carbon structures were simultaneously achieved by ammonia treatment. The physicochemical properties of the resulting materials and consequently their performance for the oxygen evolution were systematically altered by varying the cobalt loading (5–89 wt %), pyrolysis atmosphere (argon or ammonia), and temperature (600–800 °C). Thereby, up to 37 wt % of the cobalt nanoparticles were confined in the pores of the mesostructured nitrogen-doped carbon materials with a high BET surface area. At temperatures above 700 °C, the cobalt additionally catalyzes the graphitization of the carbon support. The catalyst with a cobalt loading of 37 wt % pyrolyzed at 700 °C under an ammonia atmosphere shows the highest turnover frequency (TOF) of 311 h–1 in the oxygen evolution reaction due to the improved electronic properties of the carbon support from the incorporation of nitrogen atoms combined with a large amount of accessible cobalt sites. This class of materials shows even higher activity in comparison with ordered mesoporous Co3O4.

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Language(s): eng - English
 Dates: 2019-06-142019-08-192019-09-23
 Publication Status: Published online
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acsaem.9b01183
 Degree: -

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Title: ACS Applied Energy Materials
  Abbreviation : ACS Appl. Energy Mater.
Source Genre: Journal
 Creator(s):
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 2 (9) Sequence Number: - Start / End Page: 6672 - 6680 Identifier: ISSN: 02574-0962
CoNE: https://pure.mpg.de/cone/journals/resource/2574-0962