Nanoparticle-electrode collision processes: The electroplating of bulk cadmium on impacting silver nanoparticles

► First report of the bulk deposition of a metal onto nanoparticles during collisions. ► Multilayers of Cd atoms are electroplated onto AgNPs from Cd2+(aq) during impacts. ► An average of 19 atomic layers of cadmium are found to be deposited. ► Results presented for the underpotential deposition of Cd onto AgNPs during impacts.