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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

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

Revista

Título: Electrochemistry Communications

Vol. 35

Páginas: 17-21

ISSN: 1388-2481

Editora: Elsevier

Indexação

ISI Web of Knowledge - 4 Citações

ISI Web of Science

Scopus - 4 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5