A Comparative Study of Biocathodes Based on Multiwall Carbon Nanotube Buckypapers Modified with Three Different Multicopper Oxidases

作者：Pankratov Dmitry V; Zeifman Yulia S; Morozova Olga V; Shumakovich Galina P; Vasil'eva Irina S; Shleev Sergey; Popov Vladimir O; Yaropolov Alexander I^*

来源：Electroanalysis, 2013, 25(5): 1143-1149.

DOI：10.1002/elan.201200516

• Biocathode
• Bilirubin oxidase
• Buckypaper
• Laccase
• Multicopper oxidase

14 Single- and multi-walled carbon nanotubes from different sources were characterized in detail, and the characteristics obtained were carefully analyzed. The carbon material with the highest capacitance, and also other superior properties (Taunit-M from NanoTechCenter, Russia), was chosen for further modification and fabrication of buckypaper based electrodes. These electrodes were biomodified with plant and fungal laccases, as well as fungal bilirubin oxidase. The designed biocathodes were investigated in simple buffers and also in a complex physiological fluid (human serum). Biocathodes based on immobilized fungal laccase were bioelectrocatalytically inactive in chloride containing media at neutral pH. In spite of the quite high current densities realized using biodevices based on plant laccase and fungal bilirubin oxidase, the limited thermal stability of the enzymes renders the biocathodes inadequate for practical applications in implanted situations.

• 出版日期2013-5