Membranes Matter: Preventing Ammonia Crossover during Electrochemical Ammonia Synthesis.

ABSTRACT: The electrochemical nitrogen and nitrate reduction reactions (E-NRR and E-NO₃RR) promise to provide decentralized and fossil-fuel-free ammonia synthesis, and as a result, E-NRR and E-NO₃RR research has surged in recent years. Membrane NH₃/NH₄⁺ crossover during E-NRR and E-NO₃RR decreases Faradaic efficiency and thus the overall yield. During catalyst evaluation, such unaccounted-for crossover results in measurement error. Herein, several commercially available membranes were screened and evaluated for use in ammonia-generating electrolyzers. NH₃/NH₄⁺ crossover of the commonly used cation-exchange membrane (CEM) Nafion 212 was measured in an H-cell architecture and found to be significant. Int

SUBMITTER: Wilder LM 

PROVIDER: S-EPMC10806602 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature