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Interfacial Synergy in CeO2-Decorated MgAl-LDH Heterostructures for Enhanced Oxygen Evolution Reaction
Rashida Yahya1, Abdul Majid Khan2, Mingmin Cao1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, China.
Chemsuschem
|May 28, 2026
Summary
This study developed CeO2-decorated MgAl-layered double hydroxide (LDH) heterostructures for efficient oxygen evolution reaction (OER) catalysis. The optimized C-5L catalyst shows superior performance and stability for water-splitting technologies.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Developing efficient, durable, and cost-effective electrocatalysts is crucial for advancing water-splitting technologies.
- The oxygen evolution reaction (OER) is a key bottleneck in water electrolysis, requiring improved catalytic materials.
- Layered double hydroxides (LDHs) and cerium oxide (CeO2) are promising materials, but their synergistic integration for enhanced OER is underexplored.
Purpose of the Study:
- To synthesize and characterize CeO2-decorated MgAl-LDH heterostructures for OER applications.
- To investigate the effect of CeO2 decoration on the structural, morphological, and electrochemical properties of MgAl-LDH.
- To evaluate the OER performance and stability of the synthesized heterostructures in alkaline media.
Main Methods:
- Facile hydrothermal synthesis of CeO2-decorated MgAl-LDH heterostructures.
- Structural and morphological characterization using techniques like XRD and TEM.
- Electrochemical evaluation of OER performance, including onset potential, overpotential, Tafel slope, charge-transfer resistance, and Cdl measurements.
Main Results:
- Successful integration of CeO2 nanoparticles onto MgAl-LDH nanosheets was confirmed, preserving the layered structure.
- The C-5L heterostructure demonstrated superior OER performance with a low onset potential (0.28 V) and overpotential (0.32 V at 10 mA cm-2).
- Optimized catalyst exhibited enhanced kinetics (low Tafel slope, low charge-transfer resistance), high mass activity (28 A g-1 at 0.37 V), and excellent stability (>100 h at 100 mA cm-2).
Conclusions:
- Interfacial engineering between CeO2 and MgAl-LDH significantly enhances OER performance.
- Controlled electronic coupling and defect modulation at the heterostructure interface are key to designing high-performance OER catalysts.
- CeO2-decorated MgAl-LDH heterostructures represent a promising class of electrocatalysts for efficient water-splitting applications.
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