Direct oxidation of L-ascorbic acid on a carbon black electrode in acidic media and polymer electrolyte fuel cells

被引：53

作者：

Fujiwara, N ^{[1
]}

Yamazaki, S ^{[1
]}

Siroma, Z ^{[1
]}

Ioroi, T ^{[1
]}

Yasuda, K ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, AIST, Ikeda, Osaka 5638577, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2006年 / 8卷 / 05期

关键词：

L-ascorbic acid; electrochemical oxidation; polymer electrolyte fuel cell; carbon black;

D O I：

10.1016/j.elecom.2006.02.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical oxidation Of L-ascorbic acid (AA) on carbon electrodes in acidic media was investigated to use AA as a fuel for direct polymer electrolyte fuel cells (PEFCs). A higher current was obtained for the oxidation of AA by modifying glassy carbon electrodes with various carbon blacks. The anodic current density depended on the electrical double-layer capacitance formed by carbon black, Nafion ionomer, and electrolyte solution. Direct-type PEFCs, in which an aqueous solution of AA was used as a fuel, were fabricated with carbon black as anodes. A maximum power density of 15 mW cm(-2) was attained at room temperature without any precious metal as an anode catalyst. This value is more than twice that obtained previously with palladium as an anode catalyst. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：720 / 724

页数：5

共 26 条

[1] Enzymatic biofuel cells for Implantable and microscale devices [J].