期刊
ELECTROCHIMICA ACTA
卷 126, 期 -, 页码 132-138出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.08.024
关键词
Laccase; Biocathode; Carbon nanotubes; Fuel cell; Biofuel cell
资金
- Polish Ministry of Sciences and Higher Education [N N204 214639]
- Switzerland through the Swiss Contribution to the enlarged European Union [PSPB 079/2010]
- EU through the European Social Fund [UDA-POKL.04.01.01-00-072/09-00]
- National Science Centre [2011/1/B/ST4/01718]
Analogues of laccase natural substrates (syringic, veratric, ferulic, vanillic, isovanillic, 3,5-dimethoxybenzoic aldehydes) were employed to bind and orient laccase molecules in a way which facilitates adsorption of the catalyst molecules and their electrical connection with the conductive support. Laccase was bound efficiently to these substrates both on gold and carbon electrodes forming, respectively, 2D and 3D films sensitive to oxygen. Gold electrodes were used for the surface plasmon resonance evaluation of the extent of laccase binding. Glassy carbon electrodes covered with single-wall carbon nanotubes (SWCNTs) covalently modified with laccase were shown to lead to higher catalytic reduction currents than the bare carbon nanotubes deposited in a similar film at the electrode. SWCNTs with ferulic group chosen for the practical application of the biocathode in the air-zinc biobattery allowed to improve its performance both in terms of power and stability in time. The open circuit potential of the cell was 1.71 +/- 0.05 V and the maximum power density achieved was 5.1 mW/cm(2) at 0.6V. (C) 2013 Elsevier Ltd. All rights reserved.
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