fig2

Figure 2. (A) Schematic illustration of the active-site engineering strategy for Ag₂₅ NC and the crystal structure of AuAg₁₂@Au₁₂(SEtPh)₁₈, with carbon atoms represented as gray wireframes; (B) Comparison of j_CO in the zero-gap CO₂ electrolyzer on the AuAg₁₂Au₁₂/GDE with other electrocatalysts; (C) Long-term CO₂ electrolysis of the AuAg₁₂Au₁₂/GDE in a zero-gap cell monitored using the full-cell potential and CO selectivity at 200 mA·cm^-2. Reproduced with permission, copyright 2022 American Chemical Society^[110]. NC: Nanocluster; GDE: glass disk electrode; NP: nanoparticle; NCB: nitrogen-doped carbon black; SA: single atom; PTFE: polytetrafluoroethylene.