Chemically Modified Electrodes for Electrocatalysis.
Abstract
At a modified electrode, electrocatalysis is accomplished by an immobilized redox substance acting as an electron transfer mediator between the electrode and a reaction substrate. Such mediated electrocatalysis is possible with monomolecular and multimolecular layers of the redox substance. The electron transfer mediation can assume several special forms which are identified and experimental examples are given. The differences between electrocatalytic behavior of monomolecular and multimolecular layers are discussed; electrocatalysis in the latter circumstance can include reaction rate elements of electrochemical charge and substrate migration through the multilayer in addition to the chemical rate. Theoretical ideas are presented which interconnect these three rate elements, to show that either all of the multilayer sites can participate in the electrocatalytic reaction, or only ca. a monolayer's worth, depending on the relative rates of the electrochemical charge transport, the diffusion of the substrate, and the chemical reaction rate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 08, 1981
- Accession Number
- ADA105563
Entities
People
- Royce W. Murray
Organizations
- University of North Carolina at Chapel Hill