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Electrochemistry of Single Nanoparticles via Electrocatalytic Amplification
Author(s) -
Bard Allen J.,
Zhou Hongjun,
Kwon Seong Jung
Publication year - 2010
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201000014
Subject(s) - electrode , chemistry , electrocatalyst , electrochemistry , nanoparticle , chemically modified electrode , nanotechnology , standard electrode potential , working electrode , chemical engineering , materials science , engineering
Recent experiments on the observation of collisions of single nanoparticles (NPs) with an electrode through amplification of the current by electrocatalysis are described. Systems in which the particles adhere to the electrode upon collision produce a step and staircase response, while those in which particles only interact for a short time with the electrode produce a spike or blip, with little change in the steady state current. Examples of both behaviors, e. g., Pt NPs on a Au electrode for hydrazine oxidation (staircase response) and IrO x NPs on a Pt electrode for water oxidation (blip response) are shown. Controlling the nature of the electrode surface is important in generating useful responses, for example, in the case of gold NPs on an oxidized Pt electrode for borohydride oxidation.