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A Glucose/Oxygen Enzymatic Fuel Cell based on Gold Nanoparticles modified Graphene Screen-Printed Electrode. Proof-of-Concept in Human Saliva
被引:65
作者:
Bollella, Paolo
[1
]
Fusco, Giovanni
[2
]
Stevar, Daniela
[1
]
Gorton, Lo
[3
]
Ludwig, Roland
[4
]
Ma, Su
[4
]
Boer, Harry
[5
]
Koivula, Anu
[5
]
Tortolini, Cristina
[1
]
Favero, Gabriele
[1
]
Antiochia, Riccarda
[1
]
Mazzei, Franco
[1
]
机构:
[1] Sapienza Univ Rome, Dept Chem & Drug Technol, Ple Aldo Moro 5, I-00185 Rome, Italy
[2] Sapienza Univ Rome, Dept Chem, Ple Aldo Moro 5, I-00185 Rome, Italy
[3] Lund Univ, Dept Analyt Chem Biochem & Struct Biol, POB 124, SE-22100 Lund, Sweden
[4] BOKU Univ Nat Resources & Life Sci, Dept Food Sci & Technol, Food Biotechnol Lab, Muthgasse 18, A-1190 Vienna, Austria
[5] VTT Tech Res Ctr Finland, POB 1000, FI-02044 Espoo, Finland
关键词:
Enzymatic fuel cells (EFCs);
Cellobiose dehydrogenase;
Laccase;
Direct electron transfer;
AuNPs;
Human saliva;
CELLOBIOSE DEHYDROGENASE;
BIOFUEL CELL;
DIRECT ELECTROCHEMISTRY;
REDOX ENZYMES;
BIOSENSOR;
EXPRESSION;
LACCASES;
PLATINUM;
ORIGINS;
OXIDASE;
D O I:
10.1016/j.snb.2017.10.025
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
This paper presents a new direct electron transfer based-miniaturized glucose/oxygen enzymatic fuel cell (EFC) whose operating ability has been tested in real saliva samples. The bioanode and biocathode are a graphene working electrode and a graphite counter electrode localized on the same screen printed electrode (SPE) modified with poly(vinyl alcohol) N-methyl-4(4'-formylstyryl)pyridinium methosulfate acetal (PVA-SbQ)/cellobiose dehydrogenase from Corynascus Thermophilus (CtCDH) C291Y/AuNPs and with Trametes Hirsuta laccase (ThLac)/AuNPs, respectively. In order to optimize the bioanode, several CDH immobilization procedures were adopted, such as drop-casting, use of Nafion membrane or PVA-SbQ photopolymer. The photopolymer showed the best performance in terms of stability and reliability. As biocathode a partially optimized laccase electrode was employed with the variant that the used nanomaterials allowed to reduce the overpotential of O-2/H2O redox reaction catalyzed by Trametes Hirsuta Laccase (ThLac), drop-tasted onto the gold nanoparticles (AuNPs) modified SPE. The performances of bioanode and biocathode were tested separately, initially immobilizing the two enzymes onto separated graphene SPEs. An efficient direct electron transfer was achieved for both elements, obtaining an apparent heterogeneous electron transfer rate constant (k(s)) of 0.99 +/- 0.05 s(-1) for CtCDH C291Y and 5.60 +/- 0.05 s(-1) for ThLac. Both electrodes were then assembled in a two compartment EFC obtaining a maximal power output of 5.16 +/- 0.15 mu W cm(-2) at a cell voltage of 0.58 V and an open circuit voltage (OCV) of 0.74 V. Successively, the bioanode and biocathode were assembled in a non compartmentalized EFC and a remarkable 50% decrease of the maximum power output at the value of 2.15 +/- 0.12 mu W cm(-2) at cell voltage of 0.48 V and an OCV of 0.62 V at pH 6.5 was registered. In order to reduce the cell dimensions in view of its possible integration in biomedical devices, the bioanode and biocaythode were realized by immobilization of both enzymes onto the same SPE. The so miniaturized EFC delivered a maximal power output of 1.57 +/- 0.07 mu W cm(-2) and 1.10 +/- 0.12 mu W cm(-2) with an OCV of 0.58 V and 0.41 V in a 100 OA glucose solution and in human saliva, respectively. C) 2017 Elsevier B.V. All rights reserved.
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页码:921 / 930
页数:10
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