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.

Zeolitic imidazolate frameworks (ZIFs) based electrocatalysts for CO₂ reduction offer unique possibilities for developing advanced materials for this reaction due to their ordered nanoporosity and pore environments, tunable characteristics and high affinity for CO₂. Still, they were not investigated sufficiently. In this study, we developed a Bismuth nanodots embedded Zeolitic Imidazolate Framework-8 (BND-ZIF-8) electrocatalyst via a one-pot synthesis method for the electrochemical CO₂ reduction reaction (eCO₂RR). Comprehensive spectroscopic and electrochemical characterization confirmed the successful integration of Bismuth into the ZIF-8 matrix. The electrocatalytic performance of the BND-ZIF-8 was assessed in multiple reactor typologies such as H-cell, flow cell, and membrane electrode assembly (MEA) setups. Remarkable differences in the performances in the three cell configurations are evidenced. Notably, the MEA configuration exhibited a marked enhancement in formate selectivity, achieving a Faradic efficiency (FE) of up to 91 % at a current density of −150 mA cm^‒². This work underscores the potential of Bi-ZIF-8 in advancing eCO₂RR while remarking on the crucial importance of the appropriate type of electrocatalytic experiments in assessing the material performance.

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.

Nowadays, extensive efforts have been devoted to the fabrication and design of metalbased catalysts with high activity, selectivity, and stability. Theoretical and experimental investigations have empowered the construction of a variety of techniques to tune the catalytic efficiency of catalysts by monitoring their size, morphology, composition, and crystal structure. Multimetal catalysts (MMCs) provide a revolutionary synergistic effect between metals, which is a promising strategy to tune and enhance the catalysts’ productivity and product selectivity. The purpose of this article is to familiarize readers with the most uptodate information regarding the synthesis and classification of MMCs. The key roles of MMCs electrocatalysts in a variety of applications such as CO₂ conversion via electrochemical CO₂ reduction reaction (ECO₂RR), H₂ evolution reaction (HER), O₂ evolution reaction (OER), O₂ reduction reaction (ORR), N₂ reduction reaction (NRR), methanol oxidation reaction (MOR), ethanol oxidation reaction (EOR), formic acid oxidation reaction (FAOR), and urea oxidation reaction (UOR) are summarized. This review also addressed the challenges and prospects for multimetallic catalyst design, characterization, and applications. This review article will provide a clear roadmap for the research and progress of multimetallic catalysts for electrocatalytic applications.