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Updated: May 2, 2026

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
Published on: February 10, 2023
Co(3)O(4)@CeO(2) core@shell cubes: designed synthesis and optimization of catalytic properties
Jiangman Zhen1, Xiao Wang, Dapeng Liu
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, Jilin (P. R. China), Fax: (+86) 431-85698041; Graduate University of Chinese Academy of Sciences, Beijing 100039 (P. R. China).
We developed a simple self-assembly method to create cobalt oxide/cerium oxide (Co3 O4 @CeO2) core@shell cubes. Tuning the shell thickness optimized their catalytic performance for CO oxidation.
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Controlling nanomaterial structure is key to enhancing material properties and performance.
- Core@shell nanostructures offer tunable properties for advanced applications.
Purpose of the Study:
- To demonstrate a facile self-assembly method for synthesizing Co3 O4 @CeO2 core@shell cubes.
- To investigate the effect of cerium oxide (CeO2) shell thickness on catalytic activity.
- To optimize the nanostructures for catalytic CO oxidation.
Main Methods:
- Synthesis of Co3 O4 @CeO2 core@shell cubes via self-assembly.
- Characterization using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray photoelectron spectroscopy (XPS).
- Evaluation of catalytic performance for CO oxidation.
Main Results:
- Successfully synthesized tunable Co3 O4 @CeO2 core@shell cubes.
- Demonstrated that CeO2 shell thickness can be controlled by adjusting the Ce/Co feeding molar ratio.
- Observed good catalytic properties for CO oxidation with the synthesized nanostructures.
Conclusions:
- The self-assembly method provides a facile route to Co3 O4 @CeO2 core@shell nanostructures with tunable shell thickness.
- Optimizing CeO2 shell thickness is crucial for enhancing catalytic performance in CO oxidation.
- These core@shell nanostructures show promise for catalytic applications.
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