高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

在铁镍层状氢氧化物上负载钌单原子用于高效尿素电氧化

杨婷1,张轶媛2,吴籼虹2   

  1. 1. 运城学院应用化学系 2.大连工业大学轻工与化学工程学院
  • 收稿日期:2026-05-02 修回日期:2026-07-04 网络首发:2026-07-12 发布日期:2026-07-12
  • 通讯作者: 吴籼虹 E-mail:wuxianhong@dlpu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号：No. 22209174)、辽宁省“兴辽英才计划”青年拔尖人才项目(批准号：No. XLYC2403097)、辽宁省博士科研启动项目(批准号：No. 2024BS197)、大连市青年科技之星项目(No. 2024RQ036)、山西省基础研究计划项目(批准号：No.202403021212304)、优秀博士来晋科研专项(批准号：No. QZX-2023015)和2025年运城市科技计划项目(批准号：No. YCKJYD-202537)资助

Ruthenium Single-Atom Supported on Iron-Nickel Layered Double Hydroxide for Efficient Urea Electrooxidation

YANG Ting1, Zhang Yiyuan2, WU Xianhong2   

  1. 1. Department of Applied Chemistry, Yuncheng University
    2. School of Light Industry and Chemical Engineering, Dalian Polytechnic University


  • Received:2026-05-02 Revised:2026-07-04 Online First:2026-07-12 Published:2026-07-12
  • Supported by:
    Supported by the the National Natural Science Foundation of China(No. 22209174), the Xingliao Talent Program, China(No. XLYC2403097), the Science and Technology Projects in Liaoning Province, China(No. 2024BS197), the Youth Science and Technology Star Project of Dalian City, China(No. 2024RQ036), the Fundamental Research Program of Shanxi Province, China(No. 202403021212304), the Scientific Research Program for PhDs Coming to Shanxi Province, China(No.QZX-2023015) and the Technology Plan Project of Yuncheng City for 2025, China(No. YCKJYD-202537)

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摘要： 采用一步电沉积法，成功在泡沫镍上原位生长了负载钌单原子的铁镍双金属层状氢氧化物（记为Ru-FeNi-LDH/NF），并系统研究了其用于尿素电氧化反应(UOR)时的催化性能。研究表明，Ru-FeNi-LDH/NF是由密集纳米片堆叠形成的网络结构，且为短程有序的低结晶度结构。球差校正透射电子显微镜（AC-TEM）进一步证实了Ru以单原子形式均匀分布于FeNi-LDH。Ru单原子负载改变了Fe和Ni位点的价态结构，降低了电荷转移电阻，提升了活性位点的暴露率，使Ru-FeNi-LDH/NF催化剂表现出良好的UOR催化活性和稳定性，仅需1.318 V和1.334 V（vs. RHE）即可达到10 mA·cm-2和100 mA·cm-2的电流密度。此外，在尿素电氧化反应与电解水析氢反应组装的流动电解池体系，Ru-FeNi-LDH/NF只需要1.347 V的电压即可达到10 mA cm-2的电流密度，并在50 mA·cm-2的电流密度下稳定运行超过50 h。UOR反应后，Ru-FeNi-LDH/NF表现出良好的结构稳定性。

关键词: 单原子, 层状金属氢氧化物, 尿素氧化反应, 电解水, 流动电解池

Abstract: Using a one-step electrodeposition method, ruthenium single atoms supported on iron-nickel bimetallic layered double hydroxide were successfully in-situ grown on nickel foam (denoted as Ru-FeNi-LDH/NF), which is used for urea oxidation reaction (UOR). The obtained Ru-FeNi-LDH/NF exhibits a network structure assembled from stacked nanosheets with amorphous characteristics. Aberration-corrected transmission electron microscopy (AC-TEM) further confirms that Ru single atoms are uniformly dispersed on the FeNi-LDH. The loading of Ru single atoms effectively modulates the valence structure of Fe and Ni sites, reduces the charge transfer resistance and increases the exposure of active sites. Consequently, the Ru-FeNi-LDH/NF catalyst exhibits excellent UOR catalytic activity and structural stability, requiring only 1.318 V and 1.334 V (vs. RHE) to achieve current densities of 10 mA·cm-2 and 100 mA·cm-2, respectively. Furthermore, in a flow electrolyzer system coupling the urea oxidation reaction with the hydrogen evolution reaction, Ru-FeNi-LDH/NF requires only 1.347 V to achieve a current density of 10 mA·cm-2 and operates stably for over 50 hours at a current density of 50 mA·cm-2. Besides, the Ru-FeNi-LDH/NF catalyst maintains good structural stability after the UOR.

Key words: Single atom, Layered metal hydroxide, Urea oxidation reaction, Water splitting, Flow electrolyzer

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