▎ 摘　　要

The kinetics of the ferrocene/ferrocenium (Cp2Fe/Cp2Fe+) redox couple immobilised on graphene nanoplatelets (GNPs) in aqueous solution are evaluated by using the nanoimpacts method. Single GNPs modified with poly(vinylferrocene) are allowed to impact a microelectrode. For the duration (ca. 10-100ms) of the impacts, the GNP adopts the potential of the electrode and acts as a chemically modified nanoelectrode. The study of individual impacts facilitates the resolution of fast electron-transfer kinetics that, for the Cp2Fe/Cp2Fe+ couple, is shown to be at least 3 +/- 1s(-1).