Amorphous Engineering of Scalable Metal-Organic Framework-Derived Electrocatalyst for Highly Efficient Oxygen
Yuwen Li1, Yuhang Wu2, Tongtong Li2
1State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
Small (Weinheim an Der Bergstrasse, Germany)
|January 31, 2024
Summary
Amorphous metal-organic framework (MOF)-derived catalysts show high efficiency and durability for the oxygen evolution reaction (OER) in alkaline solutions. These scalable catalysts, featuring Fe sites, accelerate kinetics and maintain performance over extended periods.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Engineering amorphous metal-organic frameworks (MOFs) presents opportunities for developing efficient electrocatalysts.
- The oxygen evolution reaction (OER) is critical for energy conversion technologies but requires efficient and durable catalysts.
Purpose of the Study:
- To synthesize and evaluate MOF-derived amorphous and porous electrocatalysts for efficient OER performance.
- To investigate the structural inheritance and electronic effects of Fe sites on OER kinetics.
- To demonstrate the scalability and durability of these novel electrocatalysts.
Main Methods:
- Synthesis of amorphous and porous electrocatalysts derived from FeNi-MOF.
- Electrochemical characterization of OER performance in alkaline electrolyte (1 M KOH).
- Durability testing at high current densities.
Main Results:
- MOF-derived amorphous A-FeNi exhibits highly efficient OER performance with low overpotentials (152 mV at 10 mA cm⁻²).
- A-FeNi demonstrates excellent durability, operating continuously for over 400 hours at 100 mA cm⁻².
- The amorphous structure and Fe sites contribute to retained catalytic sites, facilitated electrolyte diffusion, and accelerated reaction kinetics.
Conclusions:
- MOF-derived amorphous electrocatalysts offer a promising pathway for efficient and durable OER.
- The structural inheritance and electronic modulation by Fe sites are key to the enhanced catalytic activity.
- This work paves the way for designing advanced MOF-based amorphous electrocatalysts for energy applications.
