A biofuel cell based on pyrroloquinoline quinone and microperoxidase-11 monolayer-functionalized electrodes |
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| Institution: | 1. Department of Urology, La Croix du Sud Hospital, Quint Fonsegrives, France;2. Department of Urology, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France;3. Department of Urology, CHU Toulouse, Toulouse, France;4. Department of Radiology, La Croix du Sud Hospital, Quint Fonsegrives, France;5. Department of Radiology, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France |
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| Abstract: | A pyrroloquinoline quinone (PQQ) monolayer-functionalized-Au-electrode and a microperoxidase-11 (MP-11)-modified Au-electrode are used as catalytic anode and cathode in a biofuel cell element, respectively. The cathodic oxidizer is H2O2 whereas the anodic fuel-substrate is 1,4-dihydronicotinamide adenine dinucleotide, NADH. The PQQ-monolayer electrode catalyzes the oxidation of NADH in the presence of Ca2+ ions. The MP-11-functionalized electrode catalyzes the reduction of H2O2. The biofuel cell generates an open-circuit voltage, Voc, of ca. 320 mV and a short-circuit current density, Isc, of ca. 30 μA·cm−2. The maximum electrical power, Wmax, extracted from the cell is 8 μW at an external load of 3 kΩ. The fill factor of the biofuel cell, f=Wmax·Isc−1·Voc−1, is ca. 25%. |
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