In this work, for the first time, we showed the successful utilization of enzymatic-based (bilirubin oxidase, BOx) air-breathing gas-diffusion (ABGD-BOx) cathode in membraneless single chamber microbial fuel cells (SCMFCs). At pH range of 7.2-7.5, the cathode open circuit potentials (OCPs) achieved were in the range of 490-535 mV (vs. sat. Ag/AgCl) with the anodic OCP being between -495 mV and -530 mV (vs. sat. Ag/AgCl). The highest overall open circuit voltage (OCV) of the SCMFCs (1.05 V) fed with phosphate buffer solution (PBS) and sodium acetate (NaOAc) was achieved after 12-24 hour of operation. Polarization curves of the ABGD-BOx cathode showed lower overpotential with an advantage of up to 250 mV compared to the traditional platinum Pt-based cathode, and possessed a great potential to replace the noble metal-based cathodes in MFCs. High power generation of 2 W m-2 (200 μW cm-2, referred to cathode geometric surface area) was achieved in SCMFCs with the ABGD-BOx cathode, which was the highest power generation reported for SCMFCs with a volume greater than 100 mL.
Santoro, C., Babanova, S., Atanassov, P., Li, B., Ieropoulos, I., Cristiani, P. (2013). High Power Generation by a Membraneless Single Chamber Microbial Fuel Cell (SCMFC) Using Enzymatic Bilirubin Oxidase (BOx) Air-Breathing Cathode. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 160(10), H720-H726 [10.1149/2.058310jes].
High Power Generation by a Membraneless Single Chamber Microbial Fuel Cell (SCMFC) Using Enzymatic Bilirubin Oxidase (BOx) Air-Breathing Cathode
Santoro C
Primo
;
2013
Abstract
In this work, for the first time, we showed the successful utilization of enzymatic-based (bilirubin oxidase, BOx) air-breathing gas-diffusion (ABGD-BOx) cathode in membraneless single chamber microbial fuel cells (SCMFCs). At pH range of 7.2-7.5, the cathode open circuit potentials (OCPs) achieved were in the range of 490-535 mV (vs. sat. Ag/AgCl) with the anodic OCP being between -495 mV and -530 mV (vs. sat. Ag/AgCl). The highest overall open circuit voltage (OCV) of the SCMFCs (1.05 V) fed with phosphate buffer solution (PBS) and sodium acetate (NaOAc) was achieved after 12-24 hour of operation. Polarization curves of the ABGD-BOx cathode showed lower overpotential with an advantage of up to 250 mV compared to the traditional platinum Pt-based cathode, and possessed a great potential to replace the noble metal-based cathodes in MFCs. High power generation of 2 W m-2 (200 μW cm-2, referred to cathode geometric surface area) was achieved in SCMFCs with the ABGD-BOx cathode, which was the highest power generation reported for SCMFCs with a volume greater than 100 mL.File | Dimensione | Formato | |
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ECS BOx paper.pdf
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