Single entity electrochemistry and the electron transfer kinetics of hydrazine oxidation

Abstract The mechanism and kinetics of the electro-catalytic oxidation hydrazine by graphene oxide platelets randomly decorated with palladium nanoparticles are deduced using single particle impact electrochemical measurements in buffered aqueous solutions across pH range 2–11. Both hydrazine, N 2 H 4 , protonated 5 + shown to be electroactive following Butler-Volmer kinetics, which relative contribution is strongly pH-dependent. negligible interconversion between due sufficiently short timescale voltammetry, allows analysis two electron transfer rates from signals thus reflecting composition bulk solution at question. In this way rate determining step each specie a one no protons released so likely corresponds initial formation very short-lived radical cation either or adsorbed on platelet. Overall work establishes generic method for elucidation multistep process free any complexity imposed preceding chemical reactions occur conventional voltammetry.