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Coordination-in-pipe engineering of Pt-based intermetallic compounds with nanometer to angstrom precision
Shouyao Hu1, Jiaxin Gong1, Yu Tao1
1Department of Chemistry and Chemical Engineering, Central South University Changsha 410083 China yanjun@csu.edu.cn thomas153@126.com.
Chemical Science
|February 6, 2025
Summary
Researchers developed a new method to synthesize platinum-based intermetallic compound (Pt-IMC) nanoparticles for energy storage. This technique precisely controls nanoparticle size and surface chemistry, significantly boosting catalytic performance in methanol oxidation reactions (MOR).
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Controlling particle size, surface coordination, and composition of platinum-based intermetallic compound (Pt-IMC) nanoparticles is crucial for optimizing their reactivity in energy storage applications.
- Existing methods often lack the precision needed for simultaneous regulation of these critical nanoparticle properties.
Purpose of the Study:
- To develop a general and versatile synthetic method for Pt-IMCs with tunable properties.
- To investigate the impact of controlled surface coordination on catalytic activity, specifically for the methanol oxidation reaction (MOR).
Main Methods:
- A coordination-in-pipe engineering strategy using SBA-15 as a template was employed.
- Varying pipe diameters allowed control over nanoparticle size (3-9 nm).
- Adjusting the nitrogen (N) source modulated the coordination number of interface metal atoms.
Main Results:
- The method successfully synthesized Pt-IMCs with various fourth-period transition metals.
- Pt3Co IMCs synthesized with 1,10-phenanthroline (Pt3Co@CN) exhibited the highest MOR catalytic performance (2.19 A mgPt-1).
- Nitrogen coordination influenced the electronic states of surface Pt and Co, enhancing catalytic activity by facilitating electron accumulation and reducing activation energy.
Conclusions:
- The coordination-in-pipe method offers a general approach for synthesizing precisely engineered Pt-IMCs.
- Surface coordination engineering at the angstrom scale is a key factor in enhancing the catalytic performance of Pt-IMCs for MOR.
- This strategy holds promise for developing advanced catalysts for energy storage and conversion applications.
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