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  Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction

Yu, M., Moon, G.-H., Castillo, R. G., DeBeer, S., Weidenthaler, C., & Tüysüz, H. (2020). Dual Role of Silver Moieties Coupled with Ordered Mesoporous Cobalt Oxide towards Electrocatalytic Oxygen Evolution Reaction. Angewandte Chemie International Edition, 59(38), 16544-16552. doi:10.1002/anie.202003801.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-9A2B-D Version Permalink: http://hdl.handle.net/21.11116/0000-0007-5CC3-6
Genre: Journal Article

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 Creators:
Yu, Mingquan1, Author              
Moon, Gun-Hee1, Author              
Castillo, Rebeca G.2, Author
DeBeer, Serena3, Author              
Weidenthaler, Claudia4, Author              
Tüysüz, Harun1, Author              
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
2IMPRS-RECHARGE, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023870              
3Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023871              
4Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              

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Free keywords: activation; Ag2O nanoclusters; iron incorporation; ordered mesoporous Co3O4; oxygen evolution reaction
 Abstract: Herein, we show that performance of mesostructured cobalt oxide electrocatalyst for oxygen evolution reaction (OER) can be significantly enhanced with coupling of silver species. Various analysis techniques including pair distribution function and Rietveld, X-ray absorption spectroscopy at synchrotron as well as advanced electron microscopy revealed that silver exists as metallic Ag particles and well-dispersed Ag2O nanoclusters within mesostructure. The benefits of this synergy are twofold for OER: highly conductive metallic Ag improves the charge transfer ability of the electrocatalyst while ultra-small Ag2O clusters provide the centers that can uptake Fe impurities from KOH electrolyte and boost the catalytic efficiency of Co-Ag oxides. The current density of mesostructured Co3O4 at 1.7 VRHE is increased from 102 to 211 mA cm-2 with incorporation of silver spices. This work presents the dual role of silver moieties and demonstrates a simple method to increase the OER activity of Co3O4.

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Language(s): eng - English
 Dates: 2020-03-132020-06-122020-06-142020-09-14
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.202003801
 Degree: -

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Title: Angewandte Chemie International Edition
  Abbreviation : Angew. Chem., Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 59 (38) Sequence Number: - Start / End Page: 16544 - 16552 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851