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Published on: December 6, 2021
Stabilized Co Single-Atom Catalyst via Ion Implantation for Efficient Hydrogen Production
Jaerim Kim1,2, Sung-Hyuk Her1, Dong-Seok Kim3
1Department of Materials Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, 37673, Republic of Korea.
Ion implantation stabilizes single-atom catalysts (SACs) for efficient hydrogen evolution. This universal method creates defect-rich supports, enhancing catalyst activity and longevity for sustainable energy applications.
Area of Science:
- Materials Science
- Catalysis
- Surface Chemistry
Background:
- Single-atom catalysts (SACs) offer high efficiency but face challenges due to thermodynamic instability.
- Developing stable SACs is crucial for practical applications in catalysis and energy conversion.
Purpose of the Study:
- To present a novel method for synthesizing stabilized single-atom catalysts (SACs).
- To investigate the electrocatalytic performance of stabilized Co-based SACs for hydrogen evolution reaction (HER).
- To demonstrate the universality of the ion implantation technique for various metal-support combinations.
Main Methods:
- Utilized ion implantation to introduce Co ions onto a NiO support at 120 keV.
- Controlled ion fluence to achieve atomic dispersion and induce defects like oxygen vacancies.
- Characterized the catalyst structure and evaluated its performance in hydrogen evolution reaction (HER).
Main Results:
- Successfully synthesized stabilized Co-based SACs without significant aggregation.
- Observed enhanced HER activity and long-term stability with negligible degradation.
- Demonstrated the synthesis of Cu, Ni, and Fe-based SACs, confirming the technique's versatility.
Conclusions:
- Ion implantation is a universal and effective strategy for creating stabilized SACs.
- The developed Co single-atom supported NiO catalyst shows excellent performance for HER.
- This approach facilitates the development of advanced catalysts for sustainable energy conversion systems.
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