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Updated: Sep 29, 2025
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Published on: December 6, 2021
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Dual-Site Single-Atom Catalysts with High Performance for Three-Way Catalysis
Xuan Zhou1,2, Kai Han3, Kai Li1,2
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
Advanced Materials (Deerfield Beach, Fla.)
|March 24, 2022
Summary
Novel dual-site catalysts featuring platinum (Pt) and palladium (Pd) on cerium dioxide (CeO2) show high efficiency for eliminating nitrogen oxides (NOx) and carbon monoxide (CO). This breakthrough offers improved fuel efficiency and emission control.
Area of Science:
- Materials Science
- Catalysis
- Environmental Science
Background:
- Increasing air pollution and stringent emission regulations necessitate the development of highly efficient three-way catalysts (TWCs).
- Conventional catalysts face challenges in meeting the demand for superior performance in pollutant abatement.
Purpose of the Study:
- To fabricate a novel dual-site catalyst with strongly coupled platinum (Pt) and palladium (Pd) atoms on cerium dioxide (CeO2).
- To investigate the catalytic performance of the synthesized material for three-way emissions control, particularly NO elimination.
Main Methods:
- A multi-step heating strategy was employed to synthesize the dual-site catalyst.
- Comprehensive investigations were conducted to understand the catalytic mechanisms and interactions between Pt and Pd atoms.
Main Results:
- The fabricated dual-site catalyst demonstrated outstanding three-way catalytic performance, with exceptional efficiency in NO elimination.
- Strong interactions between neighboring Pt and Pd atoms were observed, creating distinct active sites for CO and NO adsorption.
- The catalyst design significantly reduced the energy barrier and accelerated the reaction rates for pollutant conversion.
Conclusions:
- The synergistic effect between neighboring Pt and Pd atoms is key to the enhanced catalytic activity.
- This study provides a promising pathway for designing next-generation catalysts for improved fuel efficiency and emission control.
- The findings contribute to advancing the field of catalysis for environmental applications.
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