Wednesday, 4 October 2017: 17:40
National Harbor 8 (Gaylord National Resort and Convention Center)
The pyridine-mediated electrochemical reduction of CO2 to methanol, formate, and formaldehyde was first demonstrated by Bocarsly et. al in 1994. Since then, many mechanistic investigations of this process have been conducted using reactivity measurements, cyclic voltammetry, or computational methods; however, direct experimental mechanistic investigation has been lacking. We employ surface-enhanced infrared absorption spectroscopy, coupled with traditional electrochemical techniques to probe the electrochemical interface during the pyridine-mediated electrochemical reduction of CO2 on Pt electrocatalysts. Previously proposed mechanisms are discussed and refined in light of new insights obtained in this study.