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Cathodic electroorganic reaction on silicon oxide dielectric electrode
Samuel J Shin1, Sangmee Park2, Jin-Young Lee3
1Department of Chemistry, College of Natural Science, Seoul National University, 08826 Seoul, Republic of Korea.
Summary
Oxidized products form at the cathode during electroorganic reactions on silicon oxide dielectrics. Electrochemically generated hydrogen species are identified as the cause, opening new synthetic routes.
Area of Science:
- Electrochemistry
- Organic Synthesis
- Materials Science
Background:
- Faradaic reactions at insulators are counterintuitive and underexplored.
- Electroorganic reactions at dielectric layers present unique opportunities.
- Cathodic reactions at silicon oxide surfaces remain largely uninvestigated.
Purpose of the Study:
- To investigate cathodic electroorganic reactions at a silicon oxide dielectric.
- To explore the use of defective n+-Si/SiO2 as a dielectric electrode.
- To demonstrate the synthesis of oxidized organic products at the cathode.
Main Methods:
- Utilizing defective 200-nm-thick n+-Si/SiO2 as a dielectric electrode.
- Performing electrolysis in an H-type divided cell.
- Investigating the cathodic reaction of anthracene and its derivatives under various conditions.
Main Results:
- Demonstrated the generation of oxidized products at the cathode during electroorganic reactions.
- Identified electrochemically generated hydrogen species (hydrogen atom) as the key factor.
- Provided consistent evidence across varied experimental conditions.
Conclusions:
- Cathodic electroorganic reactions at dielectric layers are feasible.
- Electrochemically generated hydrogen species drive the formation of oxidized products at the cathode.
- This phenomenon suggests a novel synthetic strategy for organic molecules.
