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  Highly Active Cobalt-Based Electrocatalysts with Facile Incorporation of Dopants for the Oxygen Evolution Reaction

Moon, G.-H., Yu, M., Chan, C. K., & Tüysüz, H. (2019). Highly Active Cobalt-Based Electrocatalysts with Facile Incorporation of Dopants for the Oxygen Evolution Reaction. Angewandte Chemie International Edition, 58(11), 3491-3495. doi:10.1002/anie.201813052.

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 Creators:
Moon, Gun-Hee1, Author           
Yu, Mingquan1, Author           
Chan, Candace K.1, 2, Author           
Tüysüz, Harun1, Author           
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
2Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, , Tempe, AZ USA, ou_persistent22              

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Free keywords: cobalt; electrocatalysis; Nafion; oxygen exolution reaction; transition metals
 Abstract: In situ formation of electroactive cobalt species for the oxygen evolution reaction is simply achieved by applying an anodic bias to a commercially available cobalt precursor and Nafion binder mixture coated on a glassy carbon electrode. This preparation does not require energy-intensive materials preparation steps or noble metals, yet a low overpotential of 322 mV at 10.2 mA cm−2 and a high current density of more than 300 mA cm-2 at 1.7 VNHE were obtained in 1 m KOH. An operando electrochemical Raman spectroscopy study confirmed the formation of cobalt oxyhydroxide species and the iron stimulated the equilibrium state between Co3+ and Co4+. The iron present in the alkali electrolyte or ink solution effectively activated the cobalt species, and most of the first row transition metals could also enhance the catalytic performance. The concept presented here is one of the simplest strategies for preparing highly active electrocatalysts and is very flexible for the replacement of cobalt by other transition metals.

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Language(s): eng - English
 Dates: 2018-11-142019-01-212019-03-11
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.201813052
 Degree: -

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Title: Angewandte Chemie International Edition
  Other : Angewandte Chemie, International Edition
  Other : Angew. Chem. Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 58 (11) Sequence Number: - Start / End Page: 3491 - 3495 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851