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  The Role of Surface Hydroxylation, Lattice Vacancies and Bond Covalency in the Electrochemical Oxidation of Water (OER) on Ni-Depleted Iridium Oxide Catalysts

Nong, H. N., Tran, H. P., Spöri, C., Klingenhof, M., Frevel, L., Jones, T., et al. (2020). The Role of Surface Hydroxylation, Lattice Vacancies and Bond Covalency in the Electrochemical Oxidation of Water (OER) on Ni-Depleted Iridium Oxide Catalysts. Zeitschrift für Physikalische Chemie, 234(5), 787-812. doi:10.1515/zpch-2019-1460.

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De Gruyter
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 Creators:
Nong, Hong Nhan1, 2, Author
Tran, Hoang Phi1, Author
Spöri, Camillo1, Author
Klingenhof, Malte1, Author
Frevel, Lorenz3, Author              
Jones, Travis3, Author              
Cottre, Thorsten4, Author
Kaiser, Bernhard4, Author
Jaegermann, Wolfram4, Author
Schlögl, Robert2, 3, Author              
Teschner, Detre2, 3, Author              
Strasser, Peter1, Author
Affiliations:
1Department of Chemistry, Chemical and Materials Engineering Division, Technical University Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany, ou_persistent22              
2Department of Heterogeneous Reactions, Max-Planck-Institute for Chemical Energy Conversion, 45470 Mülheim an der Ruhr, Germany, ou_persistent22              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
4Surface Science Division, Department of Materials Science, Technical University Darmstadt, Otto-Berndt-Strasse 3, Darmstadt, 64287, Germany, ou_persistent22              

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 Abstract: The usage of iridium as an oxygen-evolution-reaction (OER) electrocatalyst requires very high atom efficiencies paired with high activity and stability. Our efforts during the past 6 years in the Priority Program 1613 funded by the Deutsche Forschungsgemeinschaft (DFG) were focused to mitigate the molecular origin of kinetic overpotentials of Ir-based OER catalysts and to design new materials to achieve that Ir-based catalysts are more atom and energy efficient, as well as stable. Approaches involved are: (1) use of bimetallic mixed metal oxide materials where Ir is combined with cheaper transition metals as starting materials, (2) use of dealloying concepts of nanometer sized core-shell particle with a thin noble metal oxide shell combined with a hollow or cheap transition metal-rich alloy core, and (3) use of corrosion-resistant high-surface-area oxide support materials. In this mini review, we have highlighted selected advances in our understanding of Ir–Ni bimetallic oxide electrocatalysts for the OER in acidic environments.

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Language(s): eng - English
 Dates: 2019-05-022019-07-072019-12-032020-05
 Publication Status: Published in print
 Pages: 26
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1515/zpch-2019-1460
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Title: Zeitschrift für Physikalische Chemie
  Abbreviation : Zeitschr. Phys. Chem.
Source Genre: Journal
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Publ. Info: Oldenbourg : Walter de Gruyter GmbH
Pages: 26 Volume / Issue: 234 (5) Sequence Number: - Start / End Page: 787 - 812 Identifier: ISSN: 0942-9352
CoNE: https://pure.mpg.de/cone/journals/resource/09429352