Fig. 3: Spectroscopic investigations.
From: Ammonia electrosynthesis from nitrate using a stable amorphous/crystalline dual-phase Cu catalyst
a In situ Raman spectra over a/c-Cu catalyst at different potentials (vs. RHE). b EPR spectra of outlet electrolytes with or without KNO3 using DMPO as radical trapping reagent. c In situ ATR-SEIRAS spectra over a/c-Cu catalyst at different potentials (vs. RHE) and d KIEs over a/c-Cu and a/c-Cu-H2 catalysts. Source data are provided as a Source Data file.
