Steady-State Potential Scan at Rotating Disk Electrode and Applications
Abstract
A method of multiple small potential steps was applied to obtain current-potential curves at a rotating disk electrode (RDE), which is more accurate than the classical potential scan RDE method. Several basic benefits of the new RDE method were summarized, including reducing charging current, removing adsorption current, identifying kinetic current, and separating kinetic and diffusion reactions. The practical application of this new method is to study high-surface-area powder catalysts for fuel cell research. An example of using this new method was demonstrated by measurement of the current-potential curves of catalytic oxygen reduction on a heat-treated, metalloporphyrins-coated graphite RDE. A successful kinetic analysis of catalytic oxygen reduction at the powder-catalyst-coated electrode was achieved.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2000
- Accession Number
- ADA382650
Entities
People
- Charles Walker
- Deryn Chu
- Rongzhong Jiang
Organizations
- United States Army Research Laboratory