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

doi:10.7503/cjcu20260178

Chem. J. Chinese Universities

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

YANG Ting¹, Zhang Yiyuan², WU Xianhong²

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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Abstract

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

CLC Number:

O646.5

TrendMD:

YANG Ting, Zhang Yiyuan, WU Xianhong. Ruthenium Single-Atom Supported on Iron-Nickel Layered Double Hydroxide for Efficient Urea Electrooxidation[J]. Chem. J. Chinese Universities, doi: 10.7503/cjcu20260178.

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

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