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  Incorporation of Cu/Ni in Ordered Mesoporous Co-Based Spinels to Facilitate Oxygen Evolution and Reduction Reactions in Alkaline Media and Aprotic Li−O2 Batteries

Priamushko, T., Budiyanto, E., Eshraghi, N., Weidenthaler, C., Kahr, J., Jahn, M., et al. (2022). Incorporation of Cu/Ni in Ordered Mesoporous Co-Based Spinels to Facilitate Oxygen Evolution and Reduction Reactions in Alkaline Media and Aprotic Li−O2 Batteries. ChemSusChem, 15(5): e202102404. doi:10.1002/cssc.202102404.

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 Creators:
Priamushko, Tatiana1, Author
Budiyanto, Eko2, Author              
Eshraghi, Nicolas3, Author
Weidenthaler, Claudia4, Author              
Kahr, Jürgen3, Author
Jahn, Marcus3, Author
Tüysüz, Harun2, Author              
Kleitz, Freddy1, Author
Affiliations:
1Department of Inorganic Chemistry-Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090 Wien, Vienna, Austria, ou_persistent22              
2Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
3Center for Low-Emission Transport, Electric Vehicle Technologies, AIT Austrian Institute of Technology GmbH, Giefinggasse 2, 1210 Wien, Vienna, Austria, ou_persistent22              
4Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              

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Free keywords: electrocatalysts; mesoporous materials; non-noble metals; oxygen evolution reaction; oxygen reduction reaction
 Abstract: Ordered mesoporous CuNiCo oxides were prepared via nanocasting with varied Cu/Ni ratio to establish its impact on the electrochemical performance of the catalysts. Physicochemical properties were determined along with the electrocatalytic activities toward oxygen evolution/reduction reactions (OER/ORR). Combining Cu, Ni, and Co allowed creating active and stable bifunctional electrocatalysts. CuNiCo oxide (Cu/Ni≈1 : 4) exhibited the highest current density of 411 mA cm−2 at 1.7 V vs. reversible hydrogen electrode (RHE) and required the lowest overpotential of 312 mV to reach 10 mA cm−2 in 1 m KOH after 200 cyclic voltammograms. OER measurements were also conducted in the purified 1 m KOH, where CuNiCo oxide (Cu/Ni≈1 : 4) also outperformed NiCo oxide and showed excellent chemical and catalytic stability. For ORR, Cu/Ni incorporation provided higher current density, better kinetics, and facilitated the 4e pathway of the oxygen reduction reaction. The tests in Li−O2 cells highlighted that CuNiCo oxide can effectively promote ORR and OER at a lower overpotential.

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Language(s): eng - English
 Dates: 2021-11-152021-12-142022-03-08
 Publication Status: Published online
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cssc.202102404
 Degree: -

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Title: ChemSusChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 15 (5) Sequence Number: e202102404 Start / End Page: - Identifier: ISSN: 1864-5631
CoNE: https://pure.mpg.de/cone/journals/resource/1864-5631