Reactivity of carbon black diamond electrode during the electro-oxidation of Remazol Brilliant Blue R

Ajeel, Mohammed A.; Daud, Wan Mohd Ashri Wan

doi:10.1039/c5ra21487d

Cited by 9 publications

(6 citation statements)

References 56 publications

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“…With the assumption that the number of electrons transferred (n) is 1, the bioanodic and biocathodic current peaks relative to the scan rate are a function of the linear plot (i p with υ 1/2 ). Kinetically, the electron transfer is not sufficiently fast to produce sufficient concentrations of the reacting species and products as determined to be essential by the Nernst equation [19]. An increase in the scan rate from 30 mV/s leads to an increase in the current density or capacitance that is faster or that is more than the faradaic current.…”

Section: Effect Of Scan Ratementioning

confidence: 99%

Characterization of Electrode Performance in Enzymatic Biofuel Cells Using Cyclic Voltammetry and Electrochemical Impedance Spectroscopy

Bojang

2020

Catalysts

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The main objective of this study was to examine the quantitative performance of the electrochemical redox reaction of glucose by glucosidase and oxygen with laccase in a phosphate buffer solution at pH 7.0. The characterization of electrode performance was performed by using electrochemical analysis such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The use of such electrochemical analysis (CV and EIS) enables a better understanding of the redox process, the charge transfer resistance, and, hence, the potential mass transfer among the electrode materials in phosphorus buffer solution. The experimental results show that the maximum power densities of the bioanode and the biocathode electrodes were 800 µA/cm2 and 600 µA/cm2, respectively. Both the bioanode and biocathode show high internal resistance. The occurrence of peak-separation shows an excellent mass-transfer mechanism and better chemical reactivity in the electrode.

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Section: Effect Of Scan Ratementioning

confidence: 99%

Characterization of Electrode Performance in Enzymatic Biofuel Cells Using Cyclic Voltammetry and Electrochemical Impedance Spectroscopy

Bojang

2020

Catalysts

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“…Electrochemical impedance spectroscopy (EIS) was utilized to explore the catalytic kinetics regarding the glycerol electrochemical oxidation [26,27]. Electrochemical impedance spectroscopy is one of the most effective techniques used to explore the electrochemical parameters of the electrode/electrolyte interface [28]. Figure 5 shows the interfacial behaviour of the prepared catalysts in KOH electrolyte containing glycerol at the potential of −0.3 V vs. Ag/AgCl tested at a frequency range of 0.01 to 10 5 Hz.…”

Section: Comparison Of Glycerol Oxidation On Pd/mwcnt Pdni/mwcnt Pdmentioning

confidence: 99%

Electrochemical Studies of Pd-Based Anode Catalysts in Alkaline Medium for Direct Glycerol Fuel Cells

et al. 2020

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This study investigates the most effective electrocatalyst for glycerol oxidation reaction (GOR) in alkaline medium for five synthesized electrocatalysts, Pd, PdNi, PdNiO, PdMn3O4 and PdMn3O4NiO, supported on multi-walled carbon nanotubes (MWCNTs) prepared using the polyol method. The particle size and crystalline size of the electrocatalysts were determined using HR-TEM and XRD techniques, respectively, while EDS was used to determine the elemental composition. XRD showed crystalline sizes ranging from 3.4 to 10.1 nm, while HR-TEM revealed particle sizes within the range of 3.4 and 7.2 nm. The electroactivity, electron kinetics and stability of the electrocatalysts towards glycerol in alkaline medium was evaluated using linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA), respectively, while the electroactive surface area (ECSA) of the electrocatalysts was determined using cyclic voltammetry (CV). The metal oxide-based Pd electrocatalysts PdNiO and PdMn3O4 were the most electrochemically active, while the addition of the second metal oxide to the Pd electrocatalyst PdMn3O4NiO did not show any improvement. This was associated with this electrocatalyst having the highest particle and crystalline sizes.

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“…Electrochemical impedance spectroscopy is one of the most effective methods for investigation of electrochemical constraints of the electrolyte/electrode interface [22][23][24]. The impedance method was employed to study the effect of color adsorption on the Al anode and rotation speed (rpm) of the electrode on electrode passivity.…”

Section: Passivation and Adsorption Phenomenonmentioning

confidence: 99%

Treatment of Textile Wastewater Using a Novel Electrocoagulation Reactor Design

Naje¹,

Ajeel²,

Alaba³

et al. 2018

Wastewater and Water Quality

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This study explored the best operating conditions for a novel electrocoagulation (EC) reactor with the rotating anode for textile wastewater treatment. The influence of operating parameters like interelectrode distance (IED), current density (CD), temperature, pH, operating time (RT) and rotation speed on the removal efficiency of the contaminant was studied. A comparative study was done using conventional model with static electrodes in two phases under same textile wastewater. The findings revealed that the optimal conditions for textile wastewater treatment were attained at RT = 10 min, CD = 4 mA/cm 2 , rotation speed = 150 rpm, temperature = 25°C, IED = 1 cm and pH = 4.57. The removal efficiencies of color, biological oxygen demand (BOD), turbidity, chemical oxygen demand (COD) and total suspended solid (TSS) were 98.50, 95.55, 96, 98 and 97.10%, respectively, within the first 10 min of the reaction. The results of the experiment reveal that the newly designed reactor incorporated with cathode rings and rotated anode impellers provide a superior treatment efficiency within a short reaction time. The novel EC reactor with a rotating anode significantly enhanced textile wastewater treatment compared to the conventional model. The values of adsorption and passivation resistance validated the pollutants removal rate.

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Reactivity of carbon black diamond electrode during the electro-oxidation of Remazol Brilliant Blue R

Abstract: This article reports for the first time, the reactivity of Carbon Black Diamond (CBD) electrode using cyclic voltammetry and electrochemical impedance techniques in 0.25 M H2SO4 solution containing 0.5 mM K4Fe(CN)6.

Cited by 9 publications

References 56 publications

Characterization of Electrode Performance in Enzymatic Biofuel Cells Using Cyclic Voltammetry and Electrochemical Impedance Spectroscopy

Characterization of Electrode Performance in Enzymatic Biofuel Cells Using Cyclic Voltammetry and Electrochemical Impedance Spectroscopy

Electrochemical Studies of Pd-Based Anode Catalysts in Alkaline Medium for Direct Glycerol Fuel Cells

Treatment of Textile Wastewater Using a Novel Electrocoagulation Reactor Design

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