| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Advanced Ceramics for Environmental Remediation
|
| Presentation Title |
In Situ Vibrational Spectroscopy Studies of CO2 Electroreduction at Cu-based Electrocatalysts |
| Author(s) |
Heng-Liang Wu |
| On-Site Speaker (Planned) |
Heng-Liang Wu |
| Abstract Scope |
The solid-liquid interfacial reactions play a crucial role in controlling the performance and stability of electrocatalysts. In situ vibrational spectroscopy techniques such as Raman and surface-enhanced infrared absorption spectroscopy (SEIRAS) are the powerful tools for examining reaction intermediates on the solid-liquid interfaces. In this talk, we report on our use of in situ SEIRAS to investigate the electrochemical CO2 reduction mechanism over Cu-based electrocatalysts. Various in situ techniques are used to examine the electrochemical reactions and provide the complementary information. For instance, different CO intermediates such as COatop and CObridge, are formed on different copper electrodes during electrochemical CO2 reduction. The evolution of surface-adsorbed intermediate is associated with the oxidation state of Cu catalysts. The formation of COatop/CObridge, can be correlated to the selectivity of CO2-to-ethylene conversion. The Cu catalysts modulated by the electrochemical method exhibit different oxidation states and reaction intermediates as well as electrocatalytic properties. |