Spring 2026 | Chemistry Seminar Series
"Redefining Spectroelectrochemistry with Free-Standing Diamond Grid Electrodes"
Dr. Cory Rusinek
Assistant Professor, Department of Chemistry ~ Miami University (Ohio)
Thursday, January 22nd, 3:30pm in FB-253
Abstract: This seminar will discuss how electrode geometry governs spectroelectrochemical (SEC) response using free-standing boron-doped diamond (G-BDD) grid electrodes. SEC is a powerful analytical method that combines electrochemical control with spectroscopic detection to study redox reactions. However, the theoretical framework for most SEC measurements still assumes simple planar electrode geometries. Modern electrodes like G-BDD feature complex 3D structures that affect diffusion. This is particularly of interest in chronoabsorptometry (CAbs), an SEC technique used for the determination of the diffusion coefficient (D), electron transfer rate constant (k), transfer coefficient (α), and more. As such, this work establishes the first quantitative relationship linking electrode geometry to the CAbs response. A proof-of-concept using a model 1-electron transfer redox analyte will be shown in addition to the BDD material's resistance to corrosion in a molten salt environment. Overall, the G-BDD electrodes expand the applicability of electroanalytical chemistry in harsh environments relevant to the energy sector.