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

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-09-30 DOI:10.1007/s10562-025-05185-4

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

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引用次数: 0

Abstract

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

This study provides a ternary metal oxides electrode for ammonia oxidation reaction, fabricated by integrated electrochemical deposition and thermal treatment.

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三元过渡金属氧化物复合材料作为电催化氨氧化的高效电极

电化学氨处理由于其操作简单、环境兼容性和对各种条件的适应性而获得了极大的兴趣。一个关键的挑战仍然是开发坚固、高活性和经济高效的氨氧化阳极。本文报道了一种用于氨氧化反应的三元金属氧化物电极，该电极采用电化学沉积和热处理相结合的方法制备。所得到的NiCoCu氧化物电极在1.62 V时，相对于RHE，氨氧化的净电流密度为75.2 mA/cm2。电解池的法拉第效率为~ 24%，运行24 h后氨的去除率为~ 93%。密度泛函理论（DFT）分析表明，Ni和Co的加入调节了催化剂的电子结构，诱导了表面电荷的重新分配，优化了反应中间体的吸附强度。本工作为制备高效电催化氨氧化NiCoCu氧化物电极建立了一种通用策略。摘要采用电化学沉积和热处理相结合的方法制备了用于氨氧化反应的三元金属氧化物电极。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.