Operando Benchtop NMR Quantifies Carbonation, Water Crossover, and Liquid Products for High-Current Electrochemical CO₂ Reduction.

ABSTRACT: Operando characterization is crucial for understanding the selectivity and stability of the electrochemical CO₂ reduction reaction (eCO₂RR). Existing operando techniques normally use single-compartment cells operating at low currents. However, high current densities on the order of 100 mA cm^-2 are required for practical applications. Under a high current, reaction pathways and electrolyte dynamics can change, and stability issues such as salt precipitation and water crossover become more pronounced. Here, we developed an inline operando NMR method that is compatible with high-current reaction conditions. Demonstrating this on a copper-catalyzed eCO₂RR at 100 mA cm^-2, the operando NMR revealed a fast decrease of Faradaic efficiency for

SUBMITTER: Zhu Z 

PROVIDER: S-EPMC12281561 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature