Single-nanoparticle (NP) collisions have enabled the measurement of electrocatalytic reactions on single NPs by the nanoconfinement-amplified current. Recently, it has been demonstrated that the electrocatalytic activity of single NPs is improved by stochastic collision electrochemistry, because the good dispersion alleviates the aggregation, deactivation, and detachment of nano-electrocatalysts adhered on the electrode surface. However, there is still a pressing need to further increase the electrocatalytic performance of single NPs.