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http://dx.doi.org/10.5012/bkcs.2013.34.9.2685

Glucose Oxidation on Gold-modified Copper Electrode  

Lim, Ji-Eun (Department of Nano Bio Energy Engineering, School of Integrative Engineering, Chung-Ang University)
Ahn, Sang Hyun (Fuel Cell Research Center, Korea Institute of Science and Technology)
Pyo, Sung Gyu (Department of Nano Bio Energy Engineering, School of Integrative Engineering, Chung-Ang University)
Son, Hyungbin (Department of Nano Bio Energy Engineering, School of Integrative Engineering, Chung-Ang University)
Jang, Jong Hyun (Fuel Cell Research Center, Korea Institute of Science and Technology)
Kim, Soo-Kil (Department of Nano Bio Energy Engineering, School of Integrative Engineering, Chung-Ang University)
Publication Information
Bulletin of the Korean Chemical Society / v.34, no.9, 2013 , pp. 2685-2690 More about this Journal
Abstract
The activities of Au-modified Cu electrodes toward glucose oxidation are evaluated according to their fabrication conditions and physico-chemical properties. The Au-modified Cu electrodes are fabricated by the galvanic displacement of Au on a Cu substrate and the characteristics of the Au particles are controlled by adjusting the displacement time. From the glucose oxidation tests, it is found that the Au modified Cu has superior activity to the pure Au or Cu film, which is evidenced by the negative shift in the oxidation potential and enhanced current density during the electrochemical oxidation. Though the activity of the Au nanoparticles is a contributing factor, the enhanced activity of the Au-modified Cu electrode is due to the increased oxidation number of Cu through the electron transfer from Cu to more electronegative Au. The depletion of electron in Cu facilitates the oxidation of glucose. The stability of the Au-modified Cu electrode was also studied by chronoamperometry.
Keywords
Glucose; Bio fuel cell; Electrochemical oxidation; Catalyst;
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