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Bio-inspired copper complexes with Cu2S cores: (solvent) effects on oxygen reduction reactions.
Jordan Mangue1, Iris Wehrung2, Jacques Pécaut3
1Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France. stephane.torelli@cea.fr.
Researchers developed a novel copper complex for oxygen reduction reactions (ORR). The study found a surprising solvent effect impacting catalyst activity and structure, crucial for developing green energy technologies.
Area of Science:
- Catalysis
- Green Chemistry
- Materials Science
Background:
- Effective alternative energy sources and green industrial processes are critical societal needs.
- Mastering oxygen reduction reactions (ORRs) is essential for developing fuel cells and sustainable chemical production.
- Bio-inspired copper (Cu)-based catalysts offer an environmentally friendly approach due to abundant, non-toxic elements.
Purpose of the Study:
- To synthesize and characterize a new dinuclear mixed-valent copper complex (6) with a Cu2S core.
- To investigate the oxygen reduction reaction (ORR) activity of the new complex and compare it with a parent catalyst (1).
- To explore the influence of solvent choice and catalyst/electron source ratios on ORR performance.
Main Methods:
- Synthesis and full characterization of the dinuclear copper complex.
- Electrochemical evaluation of oxygen reduction reaction (ORR) activity.
- Theoretical investigation using (TD)DFT calculations.
- Screening of solvent effects (acetonitrile, acetone) and catalyst/electron source ratios.
Main Results:
- The new dinuclear copper complex (6) was successfully prepared and characterized.
- A counterintuitive solvent effect was observed for the parent catalyst (1).
- Complex 6 exhibited significantly reduced ORR activity in acetonitrile, accompanied by structural changes.
Conclusions:
- The study presents a novel copper complex for ORR applications.
- Solvent choice critically impacts the performance and stability of copper-based ORR catalysts.
- Understanding these effects is vital for designing efficient and robust catalysts for green energy technologies.
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