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<p>Electrochemical ammonia treatment has garnered significant interest due to its operational simplicity, environmental compatibility, and adaptability to diverse conditions. A key challenge remains the development of robust, highly active, and cost-effective anodes for ammonia oxidation. Herein, we report a ternary metal oxides electrode for ammonia oxidation reaction, fabricated by integrated electrochemical deposition and thermal treatment. The resulting NiCoCu oxides electrode achieves a net current density of 75.2&#xa0;mA/cm<sup>2</sup> at 1.62&#xa0;V vs. RHE for ammonia oxidation. The electrolytic cell exhibits a Faradaic efficiency of ~ 24% and enables ~ 93% ammonia removal after 24&#xa0;h of operation. Density functional theory (DFT) analysis reveals that incorporating Ni and Co modulates the catalyst’s electronic structure, inducing surface charge redistribution and optimizing adsorption strength of reaction intermediates. This work establishes a versatile strategy for fabricating NiCoCu oxides electrode with high efficacy in electrocatalytic ammonia oxidation. </p> Graphical Abstract <p></p>

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A Ternary Transition Metal Oxide Composite as an Efficient Electrode for Electrocatalytic Ammonia Oxidation

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Li Xiao,
  • Xiulin Wang,
  • Huichao Yao,
  • Suofu Nie,
  • Sida Wu,
  • Sen Ren,
  • Yuqing Zhang,
  • Ruoyun Dai,
  • Yangyu Li,
  • Xingbo Ge

摘要

Electrochemical ammonia treatment has garnered significant interest due to its operational simplicity, environmental compatibility, and adaptability to diverse conditions. A key challenge remains the development of robust, highly active, and cost-effective anodes for ammonia oxidation. Herein, we report a ternary metal oxides electrode for ammonia oxidation reaction, fabricated by integrated electrochemical deposition and thermal treatment. The resulting NiCoCu oxides electrode achieves a net current density of 75.2 mA/cm2 at 1.62 V vs. RHE for ammonia oxidation. The electrolytic cell exhibits a Faradaic efficiency of ~ 24% and enables ~ 93% ammonia removal after 24 h of operation. Density functional theory (DFT) analysis reveals that incorporating Ni and Co modulates the catalyst’s electronic structure, inducing surface charge redistribution and optimizing adsorption strength of reaction intermediates. This work establishes a versatile strategy for fabricating NiCoCu oxides electrode with high efficacy in electrocatalytic ammonia oxidation.

Graphical Abstract