Related Experiment Video
Updated: Oct 29, 2025
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Reconstructed Bismuth-Based Metal-Organic Framework Nanofibers for Selective CO2 -to-Formate Conversion: Morphology
Yulong Ying1, Bahareh Khezri1, Jiri Kosina2
1Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic.
Researchers developed bismuth-based metal-organic frameworks for efficient electrochemical reduction of carbon dioxide (ERCO2) to valuable formic acid. Morphology engineering of CAU-17 nanofibers achieved high selectivity and production rates, advancing sustainable carbon capture technologies.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Electrochemical reduction of carbon dioxide (ERCO2) offers a sustainable route for carbon utilization.
- Formic acid is a valuable liquid product from ERCO2, but current selectivity is insufficient.
- Metal-organic frameworks (MOFs) show promise as electrocatalysts for CO2 conversion.
Purpose of the Study:
- To synthesize bismuth-containing MOF CAU-17 with controlled morphologies (hexagonal prisms and nanofibers) for ERCO2.
- To investigate H3BTC-mediated morphology reconstruction for creating hierarchical CAU-17 nanofiber structures.
- To evaluate the electrocatalytic performance of engineered CAU-17 for selective CO2-to-formate conversion.
Main Methods:
- Wet-chemical synthesis of CAU-17 at room temperature.
- Morphology engineering via H3BTC-mediated reconstruction.
- Electrochemical testing of CAU-17-fiber electrodes for CO2 reduction.
Main Results:
- CAU-17-fiber electrodes synthesized via morphology engineering exhibited superior performance.
- Achieved high formate Faradaic efficiency (FEHCOO-) of 96.4% and current density (jCOOH-) of 20.4 mA cm-2 at -0.9 V RHE.
- Demonstrated the effectiveness of morphology control in enhancing MOF electrocatalyst activity for ERCO2.
Conclusions:
- A mild and effective approach for CAU-17 synthesis and morphology engineering was developed.
- Morphology engineering of MOFs is crucial for optimizing surface area and catalytic activity in ERCO2.
- Engineered CAU-17 nanofibers represent a promising catalyst for selective and efficient formic acid production from CO2.
