The authors regret that an error occurred in Fig. 2 of the original publication. The data for the Cu-Mel sample were incorrectly assigned due to an inadvertent mistake during data export and figure preparation in Origin, where the dataset corresponding to 5Ag-Cu-Mel was mistakenly used. As the patterns of Cu-Mel and 5Ag-Cu-Mel are very similar, this error was not identified at the time. To verify the results, the Cu-Mel and 5Ag-Cu-Mel samples were re-prepared and measurements were repeated under identical conditions. The new data are consistent with the structural interpretation reported in the manuscript, with only minor variations within normal experimental limits.

Nanocube crystals of bimetallic Ag-Cu-Melamine molecular complexes have been originally developed as effective electrocatalysts for the CO₂ selective reduction to multicarbon products, particularly ethylene and ethanol. The bimetallic complex, containing 10 wt.% Ag demonstrates the highest performance in electro-reduction of CO₂ in both H-type and flow cells. It achieves a Faradaic efficiency of 70 % for C2 products, with 40 % attributed to ethanol and the remaining to ethylene. These results are obtained at a cathode potential of -1.0 V vs reversible hydrogen electrode (RHE) with a total current density of -50 mA·cm^-2 in the flow cell, five times higher current densities than the current densities in the H-Cell. Without Ag in the complex, only C1 products (CO and formic acid) are detected. The use of the flow cell, in addition to higher current densities, enhances C2 formation, especially ethylene, which is absent in H-type cell experiments. These novel electrocatalysts also exhibit stable performances and provide mechanistic indications of the roles of Ag and tandem cooperation with Cu.