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Kinetics of Charge‐Transfer Reactions at Nanoscopic Electrochemical Interfaces
Author(s) -
Wang Yixian,
Velmurugan Jeyavel,
Mirkin Michael V.
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.201000026
Subject(s) - chemistry , electron transfer , electrochemistry , nanometre , charge transfer coefficient , mass transfer , chemical physics , kinetics , ion , electrode , reaction rate constant , nanoscopic scale , kinetic energy , charge (physics) , nanotechnology , chemical engineering , materials science , physics , cyclic voltammetry , organic chemistry , chromatography , quantum mechanics , engineering
After several decades of intensive studies, the questions about the magnitudes of rate constants of rapid heterogeneous electron transfer (ET) and ion transfer (IT) reactions remain open. The fabrication of nanometer‐sized metal electrodes and nanopipets enabled electrochemical studies of rapid charge transfer processes at solid/liquid and liquid/liquid nanointerfaces. The nanoelectrochemical techniques offer numerous advantages such as fast mass‐transfer rate and simplified analysis of data obtained under steady‐state conditions. At the same time, kinetic data obtained at nanointerfaces may be affected by double layer effects, deviations from classical electrochemical theory, and other size‐related phenomena. Nanoelectrochemical measurements are also plagued by difficulties in characterizing nanometer‐sized interfaces and conductor/insulator boundaries. In this review, we discuss the results of fast electron and ion transfer kinetics measurements at nanointerfaces, along with related reliability problems and some approaches to fixing them.