Probing the surface chemistry of different oxidized MWCNT for the improved electrical wiring of cytochrome c nitrite reductase

• Type: Article in International Scientific Journal
• Date: 2013

Authors

C.M. Silveira (Author) Other; M. Pimpão (Author) Other; H.A. Pedroso (Author) Other; P.R.S. Rodrigues (Author) Other; J.J.G. Moura (Author) Other; Manuel Fernando R Pereira (Author) FEUP; M.G. Almeida (Author) Other

Journal

Title: Electrochemistry Communications

Vol. 35

Pages: 17-21

ISSN: 1388-2481

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 4 Citations

ISI Web of Science

Scopus - 4 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-008-CNY

DOI: 10.1016/j.elecom.2013.07.027

Abstract (EN): This work reports the evaluation of a set of multi-walled carbon nanotubes (MWCNT) presenting different surface chemistries, as interfaces for the direct electrochemistry of the multihemic nitrite reductase (ccNiR) from Desulfovibrio desulfuricans ATCC27774 (Dd). The carbon nanotubes (CNT) dispersions were prepared in aqueous media and deposited on pyrolytic graphite macroelectrodes, following a layer-by-layer methodology. The resulting MWCNT bed was coated with ccNiR and studied by cyclic voltammetry. Interestingly, although small non-catalytic cathodic waves were detected in all CNT bioconjugates, the complexity of these electrochemical signals was partially deconvoluted in some materials, the less acidic ones emphasizing the contribution of the catalytic centre. Consistently, these MWCNT were the most favourable for enzyme catalysis, highlighting the importance of the surface oxide functionalities to enzyme reactivity.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5