Fig. 2: Schematic illustration of bifunctional PANI-Co3O4/CNT electrode. | Nature Communications

Fig. 2: Schematic illustration of bifunctional PANI-Co3O4/CNT electrode.

From: Coupling nitrate capture with ammonia production through bifunctional redox-electrodes

Fig. 2: Schematic illustration of bifunctional PANI-Co3O4/CNT electrode.The alternative text for this image may have been generated using AI.

Upon anodic charging at +0.4 V vs Ag/AgCl, PANI is activated (emeraldine) and servs as an electrosorbent for nitrate. During cathodic charging, PANI is reduced to leucoemeraldine form, and adsorbed nitrate is released (−0.5 V vs Ag/AgCl), or PANI regeneration is coupled with nitrate electroconversion to ammonia by Co3O4 (−1.4 V vs Ag/AgCl).

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