Glycerol electrooxidation is a promising alternative to the oxygen evolution reaction in carbon dioxide electroreduction processes. It has the potential to both reduce the overall cell voltage and enable the commercialization of anodic oxidation products. Gold is a material that exhibits a high performance for glycerol oxidation but has a high manufacturing cost. In this work, a gold indium alloy has been synthesized that exhibits enhanced electrocatalytically properties, as evidenced by a reduction in the glycerol oxidation onset potential by 210 mV while reducing the electrode cost by 28%. This electrocatalyst has been evaluated in a flow cell configuration coupled with the cathodic reduction of carbon dioxide, and high faradaic efficiencies of up to 90% have been achieved for both the anodic and cathodic products.

The development of stable, non-toxic electrolytes is essential for electrodepositing large-area coatings. This study presents a novel low-cyanide electrolyte, offering a viable alternative to traditional cyanide-based solutions for the electroplating of gold–copper alloys. Compared to conventional baths, the new formulation offers safer handling and environmental compatibility without compromising performance. Electrolyte compositions were optimized via cyclic voltammetry, and coatings were deposited using direct current, pulse current, and reverse pulse current methods. The novel low-cyanide electrolyte system achieved a 99.1% reduction in cyanide use compared with the commercial formulation. Coatings produced with pulse current and reverse pulse current deposition exhibited structural, morphological, and mechanical properties comparable to those obtained from cyanide-based electrolytes. Overall, the low-cyanide electrolyte represents a safer, high-performance alternative to traditional cyanide-based systems.

The electrochemical reduction of CO ₂ (CO ₂ RR) into valuable C ₁ products such as CO is a promising strategy for sustainable fuel and commodity chemicals production. Hereby, the synergistic effects of Au–Cu bimetallic electrocatalysts in the presence of chloride electrolytes to enhance CO ₂ RR selectivity and efficiency are explored by combining experiments and computational modeling. Gas diffusion electrodes (GDEs) composed of Au, Cu, and AuCu alloys were synthesized by electrodeposition and tested in KHCO ₃ and KCl electrolytes. While Au exhibited high CO selectivity in KHCO ₃ , the AuCu and Au ₂ Cu alloys showed significantly improved CO production in KCl, achieving faradaic efficiencies up to 80%. First‐principles calculations based on density functional theory on suited bimetallic models rationalize the observed experimental changes in selectivity in terms of promoting/inhibiting CO ₂ RR versus formic acid formation and hydrogen evolution reaction (HER). Our analysis shows that Au ₂ Cu displays the highest CO ₂ RR activity, with an Au‐rich surface composition together with Cu‐rich subsurface. These findings highlight the potential of halide‐functionalized AuCu alloys for efficient and selective CO ₂ electroreduction.