A Carbon Nanotube Layered Electrode for the Construction of the Wired Bilirubin Oxidase Oxygen Cathode |
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| Authors: | Jiseon Song Hyosul Shin Chan Kang |
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| Institution: | 1. Department of Chemistry, Research Institute of Physics and Chemistry, Chonbuk National University, Jeonju, Jeonbuk 561‐756, Republic of Korea tel. 82‐63‐270‐3420;2. fax: 82‐63‐270‐3408 |
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| Abstract: | Oxidatively treated carbon nanotubes were coated on a glassy carbon surface to form a CNT‐layer. On the CNT‐layered GC surface, a redox hydrogel film of the copolymer, of polyacryamide and poly(N‐vinylimidazole) complexed with Os(4,4′‐dichloro‐2,2′‐bipyridine)2Cl]+/2+ wiring bilirubin oxidase was immobilized. A good contact was achieved between the hydrogel film and the hydrophilic CNT‐layer with carboxylated CNTs. The prepared bilirubin oxidase cathode on the CNT‐layer was employed for the electrocatalytic reduction of O2, and enhanced current and stability were observed. Electron transfers from the electrode surface O2 molecules were analyzed. The optimal composition of the enzyme, redox polymer, and cross‐linker in the catalyst and the thickness of the CNT‐layer were determined. |
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| Keywords: | Carbon nanotube Bilirubin oxidase Oxygen reduction Redox polymer |
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