Fabrication of Vertically aligned Copper Nanotubes as a Novel Electrode for Enzymatic Biofuel Cells

Kashyap, Diwakar; Yadav, Raghvendra Singh; Gohil, Smita; Ps, Venkateswaran; Pandey, Jitendra; Kim, Gyu Man; Kim, Young Ho; Dwivedi, Prabhat K.; Sharma, Ashutosh; Ayyub, Pushan; Goel, Sanket

doi:10.1016/j.electacta.2015.03.164

Cited by 16 publications

(7 citation statements)

References 34 publications

(29 reference statements)

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“…409 For a laccase covalently bound on ordered arrays of polyaniline-coated polycrystalline copper nanotubes (200 nm in diameter and 30 μm in height) the plateau current density was 1.2 mA cm −2 (which corresponded to an absolute current of 220 μA). 410 To the best of our knowledge, no DET current was observed for a laccase covalently bound on 40 nm magnetite Fe 3 O 4 nanoparticles 411 nor with platinum nanoparticles. 412 As already stated for carbonaceous nanostructures, there is a discussion whether AuNPs increase DET efficiency by enhancing the electroactive area and thus by connecting more enzyme molecules or favor a better relative orientation of the enzyme toward the conducting material.…”

Section: Chemical Reviewsmentioning

confidence: 83%

O₂Reduction in Enzymatic Biofuel Cells

2017

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Catalytic four-electron reduction of O to water is one of the most extensively studied electrochemical reactions due to O exceptional availability and high O/HO redox potential, which may in particular allow highly energetic reactions in fuel cells. To circumvent the use of expensive and inefficient Pt catalysts, multicopper oxidases (MCOs) have been envisioned because they provide efficient O reduction with almost no overpotential. MCOs have been used to elaborate enzymatic biofuel cells (EBFCs), a subclass of fuel cells in which enzymes replace the conventional catalysts. A glucose/O EBFC, with a glucose oxidizing anode and a O reducing MCO cathode, could become the in vivo source of electricity that would power sometimes in the future integrated medical devices. This review covers the challenges and advances in the electrochemistry of MCOs and their use in EBFCs with a particular emphasis on the last 6 years. First basic features of MCOs and EBFCs are presented. Clues provided by electrochemistry to understand these enzymes and how they behave once connected at electrodes are described. Progresses realized in the development of efficient biocathodes for O reduction relying both on direct and mediated electron transfer mechanism are then discussed. Some implementations in EBFCs are finally presented.

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Section: Chemical Reviewsmentioning

confidence: 83%

O₂Reduction in Enzymatic Biofuel Cells

2017

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“…In the low-frequency region, the process is controlled by reactant diffusion to the reaction site contributing to the linear part (i.e., Warburg impedance). 36,37 The R ct for MoFe/Cc-PAA and MoFe electrode were 25 and 150 Ω, respectively. The relationship between reactant concentration and charge-transfer resistance is characterized by the equation…”

Section: Resultsmentioning

confidence: 99%

“…In the high-frequency region, the semicircle diameter is a measure of the charge-transfer resistance, which is affected by the electron transfer crossing the electrode surface. In the low-frequency region, the process is controlled by reactant diffusion to the reaction site contributing to the linear part (i.e., Warburg impedance). , The R ct for MoFe/Cc-PAA and MoFe electrode were 25 and 150 Ω, respectively. The relationship between reactant concentration and charge-transfer resistance is characterized by the equation where R is the ideal gas constant, T is the temperature, n is the number of electrons involved in the redox process, F is Faraday’s constant, K et is the potential-dependent charge transfer, [S] is the concentration of redox molecules, and A is the geometric surface area of the electrode in cm 2 .…”

Section: Resultsmentioning

confidence: 99%

Nitrogenase Bioelectrocatalysis: ATP-Independent Ammonia Production Using a Redox Polymer/MoFe Protein System

et al. 2020

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Nitrogenase is the only biological catalyst that is known to be able to convert nitrogen gas to ammonia. In microorganisms, the MoFe catalytic protein of nitrogenase is reduced by a transient Fe protein binding and separate hydrolysis of ATP. However, the requirement of 16 ATP molecules by the Fe protein for the 8 electron transfer is an energy-intense caveat to the enzymatic synthesis of NH3 and is challenging from an electrochemical perspective. Thus, we report the redox polymer-based ATP-free mediated electron-transfer system of MoFe nitrogenase using cobaltocene-functionalized poly(allylamine) (Cc-PAA), which is able to reduce the MoFe nitrogenase directly with a low redox potential of −0.58 V vs SHE. An efficient immobilization of MoFe nitrogenase via Cc-PAA allowed for the bioelectrocatalytic reduction of N3 –, NO2 –, and N2 to NH3. Bulk bioelectrosynthetic experiments produced 7 ± 2 and 30 ± 5 nmol of NH3 from NO2 – and N3 – reduction for 30 min, respectively. In addition, biosynthetic N2 reduction to NH3 was confirmed by 15N2 labeling experiments with NMR analysis. This mediated electron-transfer approach of the immobilized nitrogenase using the Cc-PAA redox polymer provides a valuable technological basis for scale-up and industrial uses in the future of bioelectrosynthesis.

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“…This ability of EIS is the responsible that nowadays EIS has become a key experimental method in a large spectrum of fields [4]. This wide range of fields includes typically electrochemistry related fields as fuel cells [5][6][7][8][9][10][11][12], batteries [13][14][15][16][17], coatings [18][19][20], electrochemical sensors [21][22][23][24][25][26] and supercapacitors [27][28][29][30][31]. But it also includes fields not traditionally linked to electrochemistry as enzymatic kinetics [32], biochemistry [33][34][35], food quality control [36], cancer detection [37][38] and immunology [39][40], amongst others.…”

Section: Introductionmentioning

confidence: 99%

Application of a Montecarlo based quantitative Kramers-Kronig test for linearity assessment of EIS measurements

Giner-Sanz

Ortega

Pérez-Herranz

2016

Electrochimica Acta

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Electrochemical Impedance Spectroscopy (EIS) is a very powerful tool to study the behaviour of electrochemical systems. Three conditions must be fulfilled during EIS measurements: causality, linearity, and stability. If any of these conditions is not achieved, then the conclusions obtained from the analysis of the measured spectra may be biased, or even misguided. For this reason, the verification of the compliance of these conditions is critical before accepting any analysis performed on an experimental spectrum. In a previous work, an experimental spectrum quantitative validation technique based on Kramers-Kronig relations was presented. The validation method consists in a Kramers-Kronig (KK) validation test, by equivalent electrical circuit fitting, coupled with a Montecarlo error propagation method. The validation technique builds a consistency region for a given confidence level that allows to discriminate between the individual points of the EIS spectrum that are consistent with the four fundamental hypotheses, and the inconsistent ones. The aim of this work is to validate experimentally if the quantitative validation technique is able to detect nonlinearities. In order to achieve this goal, the EIS spectrum of a markedly nonlinear system was measured experimentally using different perturbation amplitudes. The validation technique was applied to each one of the measured spectra. The method successfully managed to identify large nonlinearities; but did not detect slight ones.

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Fabrication of Vertically aligned Copper Nanotubes as a Novel Electrode for Enzymatic Biofuel Cells

Cited by 16 publications

References 34 publications

O₂Reduction in Enzymatic Biofuel Cells

O₂Reduction in Enzymatic Biofuel Cells

Nitrogenase Bioelectrocatalysis: ATP-Independent Ammonia Production Using a Redox Polymer/MoFe Protein System

Application of a Montecarlo based quantitative Kramers-Kronig test for linearity assessment of EIS measurements

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Fabrication of Vertically aligned Copper Nanotubes as a Novel Electrode for Enzymatic Biofuel Cells

Cited by 16 publications

References 34 publications

O2Reduction in Enzymatic Biofuel Cells

O2Reduction in Enzymatic Biofuel Cells

Nitrogenase Bioelectrocatalysis: ATP-Independent Ammonia Production Using a Redox Polymer/MoFe Protein System

Application of a Montecarlo based quantitative Kramers-Kronig test for linearity assessment of EIS measurements

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O₂Reduction in Enzymatic Biofuel Cells

O₂Reduction in Enzymatic Biofuel Cells