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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

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Budiyanto,  Eko
Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Weidenthaler,  Claudia
Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Tüysüz,  Harun
Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

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.


Cite as: http://hdl.handle.net/21.11116/0000-000A-298D-A
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.