Fig. 1: The pH dependency for CO₂ER toward CO and formate.

The j_CO for Au (a), Ag (b), Sn (c), and In (d) catalysts in electrolytes with different pH. The j_HCOO− for Sn (e) and In (f) catalysts in electrolytes with different pH. Error bars are means ± standard deviation (n = 3 replicates).