Bioelectrocatalytic Reduction of Oxygen by Hemoglobin-Adsorbed Carbon-Felt, and its Inhibition by Azide
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- HASEBE Yasushi
- Department of Life Science and Green Chemistry, Saitama Institute of Technology
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- WANG Yue
- School of Chemical Engineering, University of Science and Technology LiaoNing
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Hemoglobin (Hb) was adsorbed onto a carbon-felt (CF), which is a microelectrode ensemble of microcarbon fiber (ca. 7 µm diameter) and possesses a random three-dimensional structure. Direct electron transfer between Hb heme and the CF was achieved without any electron mediating species and special materials. The Hb-adsorbed CF (Hb-CF) showed a pair of well-defined cyclic voltammetric peaks with the formal potential of −0.221 V (vs. Ag/AgCl) at pH 5.0 (0.1 M phosphate/citrate buffer), which is attributed to Hb Fe(III)/Fe(II) redox couple. The apparent heterogeneous electron-transfer rate constant (ks) was estimated to be 14.6 s−1. Furthermore, the Hb-CF exhibited an excellent bioelectrocatalytic activity for the reduction of O2. This bioelectrocatalytic activity was inhibited by azide, which binds to active heme center of Hb.
収録刊行物
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- Electrochemistry
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Electrochemistry 80 (5), 358-362, 2012
公益社団法人 電気化学会
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詳細情報 詳細情報について
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- CRID
- 1390001206496310144
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- NII論文ID
- 130002147439
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- NII書誌ID
- AN00151637
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- COI
- 1:CAS:528:DC%2BC38XmvV2qsb4%3D
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- ISSN
- 21862451
- 13443542
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- NDL書誌ID
- 023599529
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用可