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Biosurfactants Functionalized Single-walled Carbon Nanotubes to Promote Laccase Bioelectrocatalysis

発表形態：
原著論文
主要業績：
主要業績
単著・共著：
共著
発表年月：
2017年01月
DOI：
10.1039/C6NJ02287A
会議属性：
指定なし
査読：
有り
リンク情報：

日本語フィールド

著者：
Masato Tominaga, Aiko Sasaki, Masayuki Tsushida, Makoto Togami
題名：
Biosurfactants Functionalized Single-walled Carbon Nanotubes to Promote Laccase Bioelectrocatalysis
発表情報：
巻: 41 号: 1
キーワード：
概要：
Fast oxygen (O2) reduction at high positive potential is essential to obtain effective green energy conversion systems. Here, in an attempt to develop a desirable O2 reduction biocathode for fuel cells using laccase (Lac), we modify the surface of single-walled carbon nanotubes (SWCNTs) with various biosurfactants to obtain fast direct electron transfer from the SWCNTs to Lac, resulting in O2 reduction starting from a potential close to the redox equilibrium potential of the oxygen/water couple. We found that pyranoside- and sugar-type surfactants behaved as effective modifier layers of SWCNTs to facilitate Lac bioelectrocatalysis. In particular, SWCNTs modified with the pyranoside-type surfactant n-octyl-b-D-glucopyranoside and the sugar-type surfactant n-decanoyl-N-methyl-D-glucamine exhibited electron transfer rates between the type-1 Cu site of Lac and the modified electrodes of 4000 and 2500 s 1, respectively. The number of modifier layers adsorbed onto SWCNTs strongly influenced its effect on Lac bioelectrocatalysis.
抄録：

英語フィールド

Author：
Masato Tominaga, Aiko Sasaki, Masayuki Tsushida, Makoto Togami
Title：
Biosurfactants Functionalized Single-walled Carbon Nanotubes to Promote Laccase Bioelectrocatalysis
Announcement information:
Vol: 41 Issue: 1
An abstract：
Fast oxygen (O2) reduction at high positive potential is essential to obtain effective green energy conversion systems. Here, in an attempt to develop a desirable O2 reduction biocathode for fuel cells using laccase (Lac), we modify the surface of single-walled carbon nanotubes (SWCNTs) with various biosurfactants to obtain fast direct electron transfer from the SWCNTs to Lac, resulting in O2 reduction starting from a potential close to the redox equilibrium potential of the oxygen/water couple. We found that pyranoside- and sugar-type surfactants behaved as effective modifier layers of SWCNTs to facilitate Lac bioelectrocatalysis. In particular, SWCNTs modified with the pyranoside-type surfactant n-octyl-b-D-glucopyranoside and the sugar-type surfactant n-decanoyl-N-methyl-D-glucamine exhibited electron transfer rates between the type-1 Cu site of Lac and the modified electrodes of 4000 and 2500 s 1, respectively. The number of modifier layers adsorbed onto SWCNTs strongly influenced its effect on Lac bioelectrocatalysis.

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