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Electrocatalytic Oxidation of Glucose on Gold Nanocomposite Electrodes
Author(s) -
Jin C.C.,
Taniguchi I.
Publication year - 2007
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200700171
Subject(s) - nanocomposite , electrode , underpotential deposition , cyclic voltammetry , colloidal gold , electrochemistry , catalysis , inorganic chemistry , materials science , electrocatalyst , chemistry , chemical engineering , nanoparticle , nanotechnology , organic chemistry , engineering
The electrocatalytic oxidation of glucose on gold nanocomposite electrodes was investigated with cyclic voltammetry. The gold nanocomposite electrodes were prepared by precipitating gold nanoparticles of different sizes from the corresponding colloidal solutions onto planar substrates, and the electrodes exhibited higher catalytic activity for the oxidation of glucose in alkaline solution with a negative shift in oxidation potential and a larger current as compared with bare gold electrodes. The high catalytic activity of the gold nanocomposite electrodes also resulted in easy oxidation of gluconolactone produced in the reaction. The modification of the gold nanocomposite electrodes with silver underpotential deposition led to a further negative shift in potential but a drop in current for the glucose oxidation.