| Full text | |
| Author(s): |
Aquino Neto, Sidney
;
Milton, Ross D.
;
Hickey, David P.
;
De Andrade, Adalgisa R.
;
Minteer, Shelley D.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of Power Sources; v. 324, p. 208-214, AUG 30 2016. |
| Web of Science Citations: | 18 |
| Abstract | |
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) | |
| FAPESP's process: | 14/04813-9 - Study of enzymatic nancatalyst activated by carbon nanotubes e metallic nanoparticles for biofuel cell |
| Grantee: | Adalgisa Rodrigues de Andrade |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Regular Program Grants |
| FAPESP's process: | 12/10667-0 - Preparation of hybrid nanocatalysts containing enzymes, carbon nanotubes and metallic nanoparticles for EtOH/O2 biofuel cell |
| Grantee: | Sidney de Aquino Neto |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 14/00536-0 - Preparation of hybrid nanocatalysts containing enzymes, carbon nanotubes and metallic nanoparticles for direct electron transfer biofuel cell using PQQ-dependent enzymes |
| Grantee: | Sidney de Aquino Neto |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |