Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction

Fatma Nur Tiren; Yavuz Yağızatlı; İrfan Ar

doi:10.54287/gujsa.1845054

Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction

Abstract

Nickel-based bimetallic oxides were synthesized as noble metal free anode catalysts for ethanol electrooxidation. The effects of Cu and Co incorporation into the Ni-centered oxide phase were comparatively examined. Catalysts with different Ni/Cu and Ni/Co compositions were prepared by co-precipitation and evaluated in alkaline ethanol medium to clarify the secondary metal influences phase evolution, bonding features, surface morphology, textural properties, catalytic activity, stability, and interfacial charge-transfer behavior. Among all compositions, Ni90Cu10 exhibited the best electrochemical performance, reaching 3.04 mA cm-2 at about 0.75 V and retaining 1.5 mA cm-2 after 1000 s, whereas bare Ni delivered about 0.8 mA cm-2. Structural findings indicated that Cu was incorporated into the NiO lattice to form a Ni1-xCuxO type solid solution, while the NiCo series showed a stronger tendency toward the formation of NiCo2O4/Co3O4-type spinel domains. The superior response of the NiCu series was also associated with more favorable charge-transfer behavior, whereas the NiCo catalysts exhibited less efficient interfacial kinetics. These results indicate that limited Cu addition strengthens the Ni-centered active phase for ethanol oxidation, while increasing Co content promotes spinel-rich structures that are less favorable for ethanol electrooxidation.

Keywords

References

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Details

Primary Language

English

Subjects

Electrochemical Technologies, Catalytic Activity

Journal Section

Research Article

Authors

Fatma Nur Tiren
0009-0005-2514-1306
Türkiye

Yavuz Yağızatlı ^*
0000-0003-4926-3621
Türkiye

İrfan Ar
0000-0002-6473-9205
Türkiye

Publication Date

June 30, 2026

Submission Date

December 19, 2025

Acceptance Date

April 13, 2026

Published in Issue

Year 2026 Volume: 13 Number: 2

DOI

https://doi.org/10.54287/gujsa.1845054

IZ

https://izlik.org/JA55ZH56AX

Cite

RIS / Bibtex

APA

Tiren, F. N., Yağızatlı, Y., & Ar, İ. (2026). Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction. Gazi University Journal of Science Part A: Engineering and Innovation, 13(2), 542-568. https://doi.org/10.54287/gujsa.1845054

AMA

1.Tiren FN, Yağızatlı Y, Ar İ. Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction. GU J Sci, Part A. 2026;13(2):542-568. doi:10.54287/gujsa.1845054

Chicago

Tiren, Fatma Nur, Yavuz Yağızatlı, and İrfan Ar. 2026. “Tuning Ni-Centered Active Phases With Copper and Cobalt for Ethanol Electrooxidation Reaction”. Gazi University Journal of Science Part A: Engineering and Innovation 13 (2): 542-68. https://doi.org/10.54287/gujsa.1845054.

EndNote

Tiren FN, Yağızatlı Y, Ar İ (June 1, 2026) Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction. Gazi University Journal of Science Part A: Engineering and Innovation 13 2 542–568.

IEEE

[1]F. N. Tiren, Y. Yağızatlı, and İ. Ar, “Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction”, GU J Sci, Part A, vol. 13, no. 2, pp. 542–568, June 2026, doi: 10.54287/gujsa.1845054.

ISNAD

Tiren, Fatma Nur - Yağızatlı, Yavuz - Ar, İrfan. “Tuning Ni-Centered Active Phases With Copper and Cobalt for Ethanol Electrooxidation Reaction”. Gazi University Journal of Science Part A: Engineering and Innovation 13/2 (June 1, 2026): 542-568. https://doi.org/10.54287/gujsa.1845054.

JAMA

1.Tiren FN, Yağızatlı Y, Ar İ. Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction. GU J Sci, Part A. 2026;13:542–568.

MLA

Tiren, Fatma Nur, et al. “Tuning Ni-Centered Active Phases With Copper and Cobalt for Ethanol Electrooxidation Reaction”. Gazi University Journal of Science Part A: Engineering and Innovation, vol. 13, no. 2, June 2026, pp. 542-68, doi:10.54287/gujsa.1845054.

Vancouver

1.Fatma Nur Tiren, Yavuz Yağızatlı, İrfan Ar. Tuning Ni-Centered Active Phases with Copper and Cobalt for Ethanol Electrooxidation Reaction. GU J Sci, Part A. 2026 Jun. 1;13(2):542-68. doi:10.54287/gujsa.1845054