The direct electrical connection of laccase on the electrode surface is a key feature in the design of efficient and stable biocathodes. However, laccases can perform a direct electron transfer only when they are in the preferable orientation toward the electrode. Here we report the investigation of the orientation of Laccase from Amano on multi-walled carbon nanotube surface modified with naphthalene group. Naphthylated multi wall carbon nanotubes were synthesized and the kinetics of Amano laccase adsorption and its direct electro catalytic activity toward oxygen reduction were investigated by QCM and electrochemical technics. Compared to pristine multi-walled carbon nanotube, laccase shows a high affinity to be adsorbed on naphthylated carbon nanotube. Moreover, laccase adsorption on naphthylated multi-walled carbon nanotubes surface is a very fast process and its electrical wiring to naphthylated multi-walled carbon nanotubes is accompanied by a reorientation and arrangement of adsorbed laccase. The naphthylated carbon nanotubes composite biocathode exhibits a high-performance biocathodes for oxygen reduction by direct electron transfer with maximum current densities of 3 mAcm-2.
Authors
- A. Ben Tahar,
- dr hab. inż. Kamila Sadowska link open in new tab ,
- prof. dr hab. inż. Jan Biernat link open in new tab ,
- dr inż. Ewa Paluszkiewicz link open in new tab ,
- P. Cinquin,
- D. Martin,
- A. Zebda
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.bios.2019.111961
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2020
