Assessment of the Degradation Mechanisms of Cu Electrodes during the CO₂ Reduction Reaction.

ABSTRACT: Catalyst degradation and product selectivity changes are two of the key challenges in the electrochemical reduction of CO₂ on copper electrodes. Yet, these aspects are often overlooked. Here, we combine in situ X-ray spectroscopy, in situ electron microscopy, and ex situ characterization techniques to follow the long-term evolution of the catalyst morphology, electronic structure, surface composition, activity, and product selectivity of Cu nanosized crystals during the CO₂ reduction reaction. We found no changes in the electronic structure of the electrode under cathodic potentiostatic control over time, nor was there any build-up of contaminants. In contrast, the electrode morphology is modified by prolonged CO₂ electroreduction, whic

SUBMITTER: Mom RV 

PROVIDER: S-EPMC10316322 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature