Passive fuel delivery and efficient anoxic condition in anode improve performance of methanol biofuel cell

Das, Priyanki; Bachu, Vinay; Barbora, Lepakshi; Dutta, Arup; Sarma, Mrinal Kumar; Goswami, Pranab

doi:10.1016/j.apenergy.2021.117824

Cited by 5 publications

(1 citation statement)

References 51 publications

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“…Finally, the coulombic efficiency (CE) of the microfuel cell using the different fuels has been estimated by integration of the area under the current-time curve using the following Eq. 1 and 2 [47,48]: where C p is the total coulombs calculated by integrating the current over time from Fig. 7b.…”

Section: Performance Of Microfuel Cellmentioning

confidence: 99%

Development of bioanode for versatile applications: microfuel cell system in the presence of alcohol and glucose

Ledesma‐García

Gurrola

Trejo-Arroyo

et al. 2022

Mater Renew Sustain Energy

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The purpose of this work is to develop a bioanode using the enzymes of glucose oxidase (GOx) and alcohol dehydrogenase (ADH) as catalysts to oxidised glucose and alcohol present in different beverages. The study was carried out using the covalent bonding method for both enzymes via the functionalization of carbon nanofibers for the formation of carboxyl groups that can form bonds with the amine groups of the enzyme, as well as using tetrabutylammonium bromide (TBAB) with Nafion. The optimum operation parameters of both enzymes (pH and temperature) were determined for the later evaluation in a microfluidic fuel cell. In addition, using the scanning electrochemical microscopy technique, a local study of enzymatic processes is used to demonstrate that the enzymes immobilized on the same electrode remain active. The evaluation of the microfluidic fuel cell was carried out using different solutions, 0.01 M glucose, 0.01 M ethanol and a mixture of 0.01 M glucose and 0.01 M ethanol, all in phosphate buffer solutions at pH 7, where it was possible to obtain a maximum performance of 5.07 ± 0.1 mW cm−2, and there was a significant increase in current density compared to non-composite solutions (glucose or ethanol). In addition, different alcoholic beverages were used to evaluate the versatility and adaptability of the bi-enzymatic anode electrode with the perspective use in Lab-on-a-Chip systems.

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Section: Performance Of Microfuel Cellmentioning

confidence: 99%

Development of bioanode for versatile applications: microfuel cell system in the presence of alcohol and glucose

Ledesma‐García

Gurrola

Trejo-Arroyo

et al. 2022

Mater Renew Sustain Energy

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Electrochemical Impedance Spectroscopy as a Characterization Method for Enzymatic Fuel Cell Bioanodes

Torrigino,

Nagel,

Hartmann

et al. 2024

ChemElectroChem

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Enzymatic fuel cells (EFCs) offer renewable energy conversion via highly selective electrode reactions using enzymes as natural catalysts even under mild conditions. Electrochemical impedance spectroscopy (EIS) is a valuable tool for evaluating EFC performance, providing insights into substrate mass transport, enzyme kinetics, and electrode stability. Despite its acknowledged importance, the use of EIS coupled with distribution of relaxation times (DRT) analysis in EFCs research is limited. Our study addresses this gap by employing EIS and DRT analysis to investigate enzyme‐based anodic processes, focusing on the bioelectrocatalytic oxidation of glucose catalyzed by glucose oxidase (GOx). Through careful variation of multiple parameters, it was possible to identify three distinct regions in the DRT plot. Each region has been subsequently associated with a key anodic process. The first region (R1) is associated with high‐frequency phenomena occurring at the electrodes, primarily due to ionic conduction in the electrolyte. Intermediate‐frequency processes are associated to charge transfer kinetics in region 2 (R2). Region 3 (R3) is linked to diffusion processes occurring at low frequencies. This thorough examination offers an insight into the functioning of enzymatic bioelectrodes, which in turn drives improvements in the design and components of biofuel cells to increase their power output.

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Advanced manufacture of biofuel cells

Zhao,

Hao,

Zhang

et al. 2024

Biofuel Cells

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Passive fuel delivery and efficient anoxic condition in anode improve performance of methanol biofuel cell

Cited by 5 publications

References 51 publications

Development of bioanode for versatile applications: microfuel cell system in the presence of alcohol and glucose

Development of bioanode for versatile applications: microfuel cell system in the presence of alcohol and glucose

Electrochemical Impedance Spectroscopy as a Characterization Method for Enzymatic Fuel Cell Bioanodes

Advanced manufacture of biofuel cells

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