In summary, it appears that the silver-nanoparticle layer on the electrode has several effects on the reaction components. First, the silver-NP layer lowers the overpotential preventing catalyst over-reduction and electrode passivation. Second, the lower overpotential also reduces the formation of Ni(I)-alkenyl intermediates which appear to form even in the presence of RAEs when using vinyl iodides bearing carboxylic acids. Third, this layer slows mass transport and reduction of RAEs at the electrode surface likely from complications arising with adsorptive behavior, while diffusion of the catalyst is only minorly affected. While no singular result explains the role of the silver-nanoparticle layer, we hypothesize that the overall benefit observed is likely the result of the findings discussed above working together in concert. Further interdisciplinary studies between synthetic, electroanalytical, and materials specialists will likely provide deeper insights into this unique discovery.