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Der Einfluss der Bandstruktur auf die Elektronentransferkinetik von niedrigdimensionalem Kohlenstoff
Author(s) -
Szroeder P.,
Górska A.,
Tsierkezos N.,
Ritter Uwe,
Strupiński W.
Publication year - 2013
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201300093
Subject(s) - graphene , electron transfer , carbon nanotube , materials science , fermi level , raman spectroscopy , electrode , cyclic voltammetry , chemical physics , density of states , nanotechnology , molecular physics , electron , electrochemistry , chemistry , photochemistry , condensed matter physics , optics , physics , quantum mechanics
The role of band structure in heterogeneous electron transfer kinetics at graphene and carbon nanotube electrodes is discussed within Gerischer‐Marcus model. Raman spectroscopy was used to estimate the averaged density of defects in anodized epitaxial graphene, single‐walled carbon nanotube mats, and multi‐walled carbon nanotube carpets. Comparison of the density of defects with cyclic voltammetry data reveals correlation between the defect induced electronic states near the Fermi level and electrochemical efficiency. Electron transfer at low dimensional carbon electrodes is additionally enhanced by layer curvature and doping. Results show that defect induced states are responsible for large dispersion of heterogeneous electron transfer rate constant at different graphitic nanocarbon electrodes.