Voltammetric study of formic acid oxidation via active chlorine on IrO2/Ti and RuO2/Ti electrodes

Ollo, Kambiré; Guillaume, Pohan Lemeyonouin Aliou; Placide, Sadia Sahi; Etienne, Kouadio Kouakou; Ouattara, Lassana

doi:10.13171/mjc10802010271525ko

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…In spite of their rapidity, these methods have proven to be not very efficient considering the standards required on these discharges. Electrochemical methods have shown their efficiency in the complete oxidation of organic pollutants [6][7][8][9][10] . However, this method is expensive due to the use of electrical energy for its realization.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of methyl orange in an aqueous solution in presence of copper oxide

2023

JCBSC

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A mixture of H2O2 and copper oxide catalysts under solar irradiation was used to effectively degrade Methyl Orange (MO). H2O2 in the presence of copper oxide facilitated the abundant production of hydroxyl radicals responsible for MO degradation. A 100% degradation rate was obtained after 45 min, 60 min, 75 min and 90 min respectively for pH equal to 2; 3; 5 and 6.5. The time of MO is all the more reduced that the acidity of the solution resulting from the mixture is strong. According to this work, an optimum amount of 1 g/L copper oxide and 3.10 -2 mol/L H2O2 is required for better degradation of MO. However, for higher amounts of catalyst, the reaction rate decreases due to the screening effect that occurs between the particles, masking much of the photosensitive surface. MO degradation is even faster for low concentrations than for high concentrations. Indeed, the higher the concentration of the pollutant, the more difficult it is for the light to reach the catalyst and the lower the absorption rate of the pollutant to be degraded.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of methyl orange in an aqueous solution in presence of copper oxide

2023

JCBSC

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“…According to the literature [9][10][11][12], physical, biological and chemical methods are usually used in wastewaters treatment. Thus, activated carbon is widely used to treat organic and inorganic pollutants [13,14] and also, to immobilize metal ions such as copper, zinc, cadmium or chromium [15].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical oxidation and electroanalysis of paracetamol on a boron-doped diamond anode material in aqueous electrolytes

Kouadio

Ollo²,

Koffi

et al. 2021

J. Electrochem. Sci. Eng.

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Electrochemical oxidation of paracetamol on boron-doped diamond (BDD) anode has been studied by cyclic voltammetry and preparative electrolysis. Quantification of paracetamol during electrolysis has been mainly realized by differential pulse voltammetry technique in the Britton-Robinson buffer solutions used as the supporting electrolyte. Various parameters such as current intensity, nature of the supporting electrolyte, temperature, and initial concentration of paracetamol have been investigated. The electrochemical characterization by the outer sphere Fe(III)/Fe(II) redox couple has also been performed, showing the metallic character of BDD electrode. The obtained linear dependency of the oxidation peak current intensity and paracetamol concentration indicates that BDD electrode can be used as an electrochemical sensor for the detection and quantification of paracetamol. The investigation of paracetamol degradation during preparative electrolysis showed that: (i) the degradation rate of paracetamol increases with increase of current intensity applied; (ii) for the initial concentrations of 10, 6 and 1 mM of paracetamol, its oxidation rate reaches 60, 78 and 99 % respectively, after 1 h of electrolysis in 0.3 M H2SO4 (pH 0.6) at applied current density of 70 mA cm-2; (iii) at temperatures of electrolyte solution of 28, 55 and 75 °C, paracetamol oxidation rate reached 85, 92 and 97 % respectively, after 2 h at applied current density of 70 mA cm2. From the investigation of the effect of pH value of electrolyte solution, it appears that oxidation of paracetamol is more favorable in acidic solution at pH 3 than solutions of higher pH values.

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A Comprehensive Analysis of the Hydrogen Generation Technology Through Electrochemical Water and Industrial Wastewater Electrolysis

Al-Obaidi,

Ibrahim,

Mohammed

et al. 2024

Polish Journal of Chemical Technology

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Most renewable energy sources are intermittent and seasonal, making energy storage and consumption problematic. Hydrogen gas can save and convey chemical energy, making it a promising sustainable energy source. Electrochemical water electrolysis technology’s sustainable and efficient hydrogen gas production attracts global attention. Higher hydrogen production rates enhance hydrogen volumetric energy capacity by storing intermittent hydrogen gas in high-pressure tanks. Pressurized storage tanks are cost-effective and efficient. Hydrogen gas may be stored economically and efficiently in pressurized tanks, making electrochemical water electrolysis a sustainable energy source. This paper introduced hydrogen as an alternative to natural gas, detailed water electrolysis technologies for hydrogen production, and highlighted how they can manufacture hydrogen efficiently and cost-effectively. The theoretical volume of gaseous hydrogen and oxygen that could be produced by electrolyzing water under typical temperature and pressure (STP) circumstances, assuming a 100% efficiency rate of the process. Since there are always two moles of hydrogen produced by electrolysis and one mole of gas occupies the same volume, the volume of hydrogen developed from water is twice that of oxygen. The volume of liberated oxygen is 0.21 (L/min), and the volume of liberated hydrogen is 0.42 (L/min) with a current density of 30 A, for instance, the tracer’s diffusion coefficient for all conceivable flow rates. A maximum value of 90 liters per hour was determined to be the threshold at which the diffusion coefficient increased with increasing flow rate. It would appear that the diffusion coefficient remains unchanged at flow rates greater than 90 liters per hour.

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Voltammetric study of formic acid oxidation via active chlorine on IrO2/Ti and RuO2/Ti electrodes

Cited by 5 publications

References 30 publications

Photocatalytic degradation of methyl orange in an aqueous solution in presence of copper oxide

Photocatalytic degradation of methyl orange in an aqueous solution in presence of copper oxide

Electrochemical oxidation and electroanalysis of paracetamol on a boron-doped diamond anode material in aqueous electrolytes

A Comprehensive Analysis of the Hydrogen Generation Technology Through Electrochemical Water and Industrial Wastewater Electrolysis

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