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Amorphous-Amorphous Coupling Enhancing the Oxygen Evolution Reaction Activity and Stability of the NiFe-Based
Hanqing Gao1, Wei Sun1, Xinlong Tian2
1Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Road, Haikou, Hainan 570228, People's Republic of China.
This study introduces a novel NiFe-based catalyst (A-NiFe NS/CuS) that enhances electrocatalytic water splitting. The amorphous-amorphous coupling effect improves catalyst activity and durability for the oxygen evolution reaction (OER).
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Efficient electrocatalytic water splitting is crucial for energy storage and conversion.
- The oxygen evolution reaction (OER) is a key bottleneck due to catalyst limitations.
Purpose of the Study:
- To develop an advanced NiFe-based catalyst for accelerated and stable OER.
- To investigate the role of amorphous-amorphous coupling in enhancing catalyst performance.
Main Methods:
- Fabrication of amorphous NiFe layered double hydroxide (LDH) nanosheets on amorphous CuS (A-NiFe NS/CuS).
- Characterization of the catalyst's structure and electronic properties.
- Electrocatalytic testing for OER activity and stability.
Main Results:
- The A-NiFe NS/CuS catalyst exhibited a low overpotential of 240 mV at 100 mA cm⁻².
- The catalyst demonstrated robust stability over 100 hours of operation.
- Amorphous-amorphous coupling significantly enhanced reaction kinetics and durability.
Conclusions:
- Amorphous-amorphous coupling is an effective strategy for designing high-performance OER catalysts.
- The developed A-NiFe NS/CuS catalyst shows great promise for efficient and stable water splitting.
- Rational catalyst engineering can overcome limitations in current OER technologies.
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