Journal
ELECTROCHIMICA ACTA
Volume 54, Issue 20, Pages 4626-4630Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.02.097
Keywords
Direct electron transfer; Electrocatalysis; Glucose oxidase; Mesoporous carbon FDU-15; Glucose
Categories
Funding
- National High Technology Research and Development Program of China [2007AA05Z159, 2007AA05Z143]
- National Natural Science Foundation of China [20876153, 20703043]
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- Jilin University
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In this paper, it was found that glucose oxidase (GOD) has been stably immobilized on glassy carbon electrode modified with mesoporous carbon FDU-15 (MC-FDU-15) and Nafion by simple technique. The sorption behavior of GOD immobilized on MC-FDU-15 matrix was characterized by transmission electron microscopy (TEM), ultraviolet-visible (UV-vis), FTIR, respectively, which demonstrated that MC-FDU-15 could facilitate the electron exchange between the active center of GOD and electrode. The direct electrochemistry and electrocatalysis behavior of GOD on the modified electrode were characterized by cyclic voltammogram (CV) which indicated that GOD immobilized on Nafion and MC-FDU-15 matrices display direct, reversible and surface-controlled redox reaction with an enhanced electron transfer rate constant of 4.095 s(-1) in 0.1 M phosphate buffer solution (PBS) (pH 7.12). Furthermore, it was also discovered that, in the presence Of 02, GOD immobilized on Nafion and MC-FDU-15 matrices could produce a linear response to glucose. Thus, Nafion/GOD-MC-FDU-15/GC electrode is hopeful to be used in glucose biosensor. In addition, GOD immobilized on MC-FDU-15 and Nafion matrices possesses an excellent bioelectrocatalytic activity for the reduction Of O-2. So, the Nafion/GOD-MC-FDU-15/GC electrode can be utilized as the cathode in biofuel cell. (C) 2009 Elsevier Ltd. All rights reserved.
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