Based on the earlier expressed idea of the electrochemical production of the metal particles in the bulk solution through the mediator reduction of their ions or complexes,we recently have carried out the electrosynthesis of the palladium nanoparticles by reduction of 〖[PdCl4]〗^(2-) using viologen-cavitand MVCA-С_5^(8+)∙8Cl− as a mediator and stabilizer of Pd nanoparticles. In this article, we report the electrochemical synthesis of silver nanoparticles in the bulk solution using also MVCA-С_5^(8+)·8PF^(6-) as a mediator. Silver nanoparticles (typically 5–50 nm) spectral selectively (~400 nm) absorb solar energy; exhibit catalytic and antibiotic properties; and are the most common and widely used nanoparticles.Known methods of their preparation and properties sufficiently completely are summarized in the review. Currently,the most widely used method of their synthesis is the reduction of silver salts by sodium borane, first proposed by Creighton,Lee and Meisel.