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Engineering NiMoO4/NiFe LDH/rGO multicomponent nanosheets toward enhanced electrocatalytic oxygen evolution reaction
Lei Jin1, Qing Wang1, Kun Wang1
1Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China. xuhui006@cczu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|April 7, 2022
Summary
A novel three-component catalyst, NiMoO4/NiFe LDH/rGO, significantly enhances the oxygen evolution reaction (OER) by leveraging synergistic effects. This advanced nanomaterial offers superior performance compared to commercial catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Two-dimensional (2D) nanomaterials are promising for electrocatalytic oxygen evolution reaction (OER).
- Rational design of multi-component heterojunctions for OER is underexplored.
- NiFe layered double hydroxide (LDH) exhibits high intrinsic OER activity.
Purpose of the Study:
- To synthesize and characterize a novel multi-component catalyst for enhanced OER.
- To investigate the synergistic effects in a three-component heterostructure.
- To demonstrate improved electrocatalytic performance compared to existing materials.
Main Methods:
- Synthesis of NiMoO4/NiFe LDH/rGO nanosheets.
- Electrocatalytic testing in 1 M KOH electrolyte.
- Characterization of electronic structure and synergistic effects.
Main Results:
- The NiMoO4/NiFe LDH/rGO catalyst achieved a current density of 10 mA cm⁻² at an overpotential of 270 mV.
- The catalyst exhibited a low Tafel slope of 76.2 mV dec⁻¹, indicating efficient OER kinetics.
- Performance surpassed that of commercial RuO2 (303 mV, 131.9 mV dec⁻¹).
Conclusions:
- The multi-component NiMoO4/NiFe LDH/rGO catalyst demonstrates excellent OER activity.
- Synergistic effects and modified electronic structure contribute to enhanced performance.
- This work provides insights for designing advanced multi-component heterostructures for catalysis.
