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Pt/IrOx enables selective electrochemical C-H chlorination at high current
1Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Republic of Singapore.
Nature Communications
|January 2, 2025
Summary
This study introduces a novel electrocatalyst for efficient alkane chlorination using sustainable methods. The process achieves high yields and stability, even utilizing concentrated seawater for chemical production.
Area of Science:
- Electrochemistry
- Catalysis
- Sustainable Chemistry
Background:
- Electrochemical alkane functionalization offers sustainable chemical production.
- Challenges include high potentials for C(sp3)-H bond activation and poor alkane solubility.
Purpose of the Study:
- To develop an efficient electrochemical method for selective alkane C-H bond chlorination.
- To utilize abundant feedstocks like concentrated seawater for chemical synthesis.
Main Methods:
- Development of a Pt/IrOx electrocatalyst with optimized Cl binding energy.
- Electrochemical C-H chlorination of alkanes in aqueous electrolytes.
- Integration with photovoltaic modules for solar-driven synthesis.
Main Results:
- Selective monochlorination of cyclohexane achieved with high Faradaic efficiency (FE) up to 95%.
- Stable performance over 100 hours demonstrated in aqueous KCl.
- Successful utilization of concentrated seawater as feedstock with 93.8% FE.
Conclusions:
- The Pt/IrOx electrocatalyst enables efficient and selective alkane chlorination.
- The process is viable using concentrated seawater and solar energy.
- This represents a sustainable pathway for renewable energy-driven chemical manufacturing.
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