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  Unraveling the Nature of Sites Active toward Hydrogen Peroxide Reduction in Fe–N–C Catalysts

Choi, C. H., Choi, W. S., Kasian, O., Mechler, A. K., Sougrati, M. T., Brüller, S., et al. (2017). Unraveling the Nature of Sites Active toward Hydrogen Peroxide Reduction in Fe–N–C Catalysts. Angewandte Chemie International Edition, 56(30), 8809-8812. doi:10.1002/anie.201704356.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C5D9-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C5E7-1
Genre: Journal Article

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 Creators:
Choi, Chang Hyuck1, 2, Author              
Choi, Won Seok3, 4, Author              
Kasian, Olga2, Author              
Mechler, Anna Katharina5, 6, Author              
Sougrati, Moulay Tahar7, Author              
Brüller, Sebastian8, Author              
Strickland, Kara9, 10, Author              
Jia, Qingying11, Author              
Mukerjee, Sanjeev9, Author              
Mayrhofer, Karl J. J.2, 12, 13, Author              
Jaouen, Frédéric7, Author              
Affiliations:
1School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea, persistent22              
2Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
3Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
4Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang, South Korea, ou_persistent22              
5Université de Montpellier, Institut Charles Gerhardt Montpellier, 2 place Eugène Bataillon, Montpellier, France, ou_persistent22              
6Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34–36, Mülheim a.d. Ruhr, Germany, persistent22              
7Institut Charles Gerhardt de Montpellier – UMR 5253, 2 Place Eugène Bataillon, 34095 Montpellier Cedex 5, France, ou_persistent22              
8Université de Montpellier, Institut Charles Gerhardt Montpellier, 2 place Eugène Bataillon, Montpellier, France, persistent22              
9Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, USA, persistent22              
10Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863336              
11Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, U, persistent22              
12Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany, ou_persistent22              
13Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany , ou_persistent22              

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Free keywords: NITROGEN-DOPED CARBON; IRON-BASED CATALYSTS; FE-57 MOSSBAUER-SPECTROSCOPY; PEM FUEL-CELL; OXYGEN REDUCTION; METAL ELECTROCATALYST; IDENTIFICATION; COORDINATION; NANOPARTICLES; CHEMISTRY
 Abstract: Fe-N-C catalysts with high O-2 reduction performance are crucial for displacing Pt in low-temperature fuel cells. However, insufficient understanding of which reaction steps are catalyzed by what sites limits their progress. The nature of sites were investigated that are active toward H2O2 reduction, a key intermediate during indirect O-2 reduction and a source of deactivation in fuel cells. Catalysts comprising different relative contents of FeNxCy moieties and Fe particles encapsulated in N-doped carbon layers (0-100%) show that both types of sites are active, although moderately, toward H2O2 reduction. In contrast, N-doped carbons free of Fe and Fe particles exposed to the electrolyte are inactive. When catalyzing the ORR, FeNxCy moieties are more selective than Fe particles encapsulated in N-doped carbon. These novel insights offer rational approaches for more selective and therefore more durable Fe-N-C catalysts.

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Language(s): eng - English
 Dates: 2017-07-17
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000405308500037
DOI: 10.1002/anie.201704356
 Degree: -

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Title: Angewandte Chemie International Edition
  Other : Angew. Chem., Int. Ed.
  Other : Angew. Chem. Int. Ed.
  Other : Angewandte Chemie, International Edition
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 56 (30) Sequence Number: - Start / End Page: 8809 - 8812 Identifier: ISSN: 1433-7851
CoNE: /journals/resource/1433-7851