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Dergiler / Gazi University Journal of Science Part A: Engineering and Innovation / 2026 / Volume: 13 Issue: 2

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

Fatma Nur Tiren(GAZİ ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, KİMYA MÜHENDİSLİĞİ BÖLÜMÜ)0009-0005-2514-1306
Yavuz Yağızatlı(GAZİ ÜNİVERSİTESİ)0000-0003-4926-3621
İrfan Ar(GAZI UNIVERSITY)0000-0002-6473-9205
Sayfa
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Yayın Tarihi
2026-06-30
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

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.

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Amaç & Hipotez:Nickel-based bimetallic oxides were synthesized as noble metal free anode catalysts for ethanol electrooxidation.
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Temel Bulgular & Veri: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.
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Sonuç & Katkı: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.
🔬Tür:Research Article
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Nickel · Copper · Cobalt

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.

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Bu Makaleye Atıf Yap

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, Volume: 13 Issue: 2. https://doi.org/10.54287/gujsa.1845054

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