| Texto completo | |
| Autor(es): |
Aquino Neto, Sidney
;
Milton, Ross D.
;
Hickey, David P.
;
De Andrade, Adalgisa R.
;
Minteer, Shelley D.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Power Sources; v. 324, p. 208-214, AUG 30 2016. |
| Citações Web of Science: | 18 |
| Resumo | |
The bioelectrooxidation of ethanol was investigated in a fully enzymatic membraneless ethanol/O-2 biofuel cell assembly using hybrid bioanodes containing multi-walled carbon nanotube (MWCNT)-decorated gold metallic nanoparticles with either a pyrroloquinoline quinone (PQQ)-dependent alcohol dehydrogenase (ADH) enzyme or a nicotinamide adenine dinucleotide (NAD(+))-dependent ADH enzyme. The biofuel cell anode was prepared with the PQQ-dependent enzyme and designed using either a direct electron transfer (DET) architecture or via a mediated electron transfer (MET) configuration through a redox polymer, 1,1'-dimethylferrocene-modified linear polyethyleneimine (FcMe(2)-C-3-LPEI). In the case of the bioanode containing the NAD(+)-dependent enzyme, only the mediated electron transfer mechanism was employed using an electropolymerized methylene green film to regenerate the NAD(+) cofactor. Regardless of the enzyme being employed at the anode, a bilirubin oxidase-based biocathode prepared within a DET architecture afforded efficient electrocatalytic oxygen reduction in an ethanol/O-2 biofuel cell. The power curves showed that DET-based bioanodes via the PQQ-dependent ADH still lack high current densities, whereas the MET architecture furnished maximum power density values as high as 226 +/- 21 mu W cm(-2). Considering the complete membraneless enzymatic biofuel cell with the NAD(+)-dependent ADH-based bioanode, power densities as high as 111 +/- 14 mu W cm(-2) were obtained. This shows the advantage of PQQ-dependent ADH for membraneless ethanol/O-2 biofuel cell applications. (C) 2016 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 14/04813-9 - Estudo de nanocatalisadores enzimáticos ativados por nanotubos de carbono e nanopartículas metálicas para biocélulas a combustível |
| Beneficiário: | Adalgisa Rodrigues de Andrade |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOEN - Regular |
| Processo FAPESP: | 12/10667-0 - Preparação de nanocatalisadores híbridos contendo enzimas, nanotubos de carbono e nanopartículas metálicas para biocélula a combustível EtOH/O2 |
| Beneficiário: | Sidney de Aquino Neto |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 14/00536-0 - Preparação de nanocatalisadores híbridos contendo enzimas, nanotubos de carbono, e nanopartículas metálicas para biocélula a combustível com transferência eletrônica direta utilizando enzimas PQQ-dependentes |
| Beneficiário: | Sidney de Aquino Neto |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |