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Strong metal-support interactions induced by an ultrafast laser
Jian Zhang1, Dezhi Zhu2, Jianfeng Yan3
1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Nature Communications
|November 19, 2021
Summary
Ultrafast laser treatment creates strong metal-support interactions (SMSI) in platinum catalysts on ceria. This novel method enhances catalytic activity and stability for CO oxidation, offering a universal approach for catalyst development.
Area of Science:
- Materials Science
- Catalysis Science
- Surface Science
Background:
- Supported metal catalysts are vital in modern industry.
- Strong metal-support interactions (SMSI) are key to tuning catalyst properties.
- Existing SMSI methods often lack efficiency and universality.
Purpose of the Study:
- To develop a novel ultrafast laser-induced strategy for constructing SMSI.
- To investigate the mechanism of laser-induced SMSI on Pt/CeO2 systems.
- To evaluate the catalytic performance of the resulting SMSI catalysts.
Main Methods:
- Ultrafast laser irradiation to induce SMSI on Pt/CeO2.
- Characterization using techniques to confirm SMSI (e.g., TEM, XPS).
- Evaluation of catalytic activity and stability for CO oxidation.
Main Results:
- Laser-induced confinement of electric fields at the interface.
- Enhanced formation of surface defects and CeOx migration.
- Formation of a CeOx overlayer on Pt nanoparticles, suppressing CO adsorption but remaining permeable to reactants.
- Demonstrated enhanced activity and stability in CO oxidation.
Conclusions:
- Ultrafast laser-induced SMSI is an effective method for catalyst engineering.
- The developed SMSI strategy offers a universal approach for various noble metal/support systems.
- This technique provides a pathway for designing high-performance supported noble metal catalysts.
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