Fig. 3: Morphology of halogenated Cu-foil electrodes.
From: A scalable method for preparing Cu electrocatalysts that convert CO2 into C2+ products
SEM images of halogenated Cu foils: a–f as-prepared; g–i after immersion in 0.1 M KHCO3 for 10 min; j–l after reduction by LSV in the potential range from OCP to −1.8 V in CO2-saturated 0.1 M KHCO3. a–c Cross-sectional images taken at a tilt angle of 45° to reveal the thickness of halogenated Cu. d–l Plan-view images. Anodic halogenation of Cu was performed for 50 s in 0.1 M KCl at 1.1 V (a, d, g, j); in 0.1 M KBr at 0.18 V (b, e, h, k); in 0.1 M KI at −0.2 V (c, f, i, l). All voltages are reported vs. Ag/AgCl. Scale bars: 2 μm.
