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Updated: Jan 14, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Visualizing alkali metal aggregation-induced coordination in CO2 activation on copper.
Wenyu Sun1, Pu Yang1,2, Yongkang Jiang3,4
1College of Chemistry, Key Laboratory of Theoretical and Computational Photochemistry, Beijing Normal University, Beijing, PR China.
Alkali metals, like potassium and cesium, form trimers on copper surfaces to activate carbon dioxide (CO2) and form oxalate intermediates. This discovery aids in designing better catalysts for carbon capture and utilization.
Area of Science:
- Surface Science
- Catalysis
- Materials Chemistry
Background:
- Alkali metals promote CO2 activation and conversion.
- The atomic-scale mechanism of alkali metal promotion is poorly understood.
- Direct visualization of intermediates is needed.
Purpose of the Study:
- To visualize the atomic structure of alkali metal-CO2 intermediates on copper surfaces.
- To elucidate the role of alkali metals in CO2 activation and conversion.
- To provide insights for catalyst design.
Main Methods:
- Scanning tunneling microscopy (STM)
- Non-contact atomic force microscopy (nc-AFM)
- Density functional theory (DFT) calculations
Main Results:
- Alkali ions (K+, Cs+) aggregate into trimers to activate CO2.
- Activated CO2 undergoes C-C coupling to form oxalate, coordinated by four alkali ions.
- Alkali trimers stabilize intermediates and lower reaction barriers for CO2 conversion.
- High CO2 pressure leads to 2D ordered alkali carbonate films.
Conclusions:
- Direct visualization confirms the role of alkali trimers in CO2 activation.
- The findings offer a mechanistic understanding of alkali metal promotion in CO2 conversion.
- This work provides a foundation for developing efficient catalysts for carbon capture and utilization.
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