Study of the electrochemical oxidation of 4,6-dimethyldibenzothiophene on a BDD electrode employing different techniques

Dávila, O. Ornelas; Lacalle-Bergeron, Leticia; Jiménez, M.M. Dávila; Sirés, Ignasi; Brillas, Enric; Roig-Navarro, A.F.; Arandes, J. Beltrán; Sancho, Juan V.

doi:10.1016/j.jelechem.2021.115364

Cited by 9 publications

(2 citation statements)

References 62 publications

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“…This phenomenon would create a local increase in concentration at the electrode interface. Assuming a constant diffusion coefficient of 2.30 × 10 −6 cm 2 s −1 , 30 we can use the limiting current density at various rotational rates and the equation:…”

Section: Resultsmentioning

confidence: 99%

Comparison of Material Activity and Selectivity in the Electrocatalytic Oxidation of Dibenzothiophene

Kompanijec¹,

Swierk²

2021

J. Electrochem. Soc.

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There is an increasing demand for efficient methods to remove sulfur from oil products, such as oxidative desulfurization. In this work, a set of five materials (gold, glassy carbon, nickel, palladium and platinum) were evaluated as electrochemical catalysts for the oxidation of dibenzothiophene (DBT). Bulk electrolysis performed without water present produced DBT dimer, while the addition of 2 M water produced dibenzothiophene sulfoxide (DBTO), both more polar than DBT. LC-MS and NMR were used to characterize the oxidation products. Faradaic efficiencies ranged from 18.4%–56.5% for DBT consumption without water present, and there was a correlation between higher rate constants, lower activation energies, and more efficient DBT oxidation. With water present, selectivity for DBTO formation was highest using gold with a Faradaic efficiency of 87.9%. Group ten metals demonstrated low Faradaic efficiencies due to competitive water oxidation. Though there were differences in the observed selectivity for DBT oxidation, all catalysts reduced the concentration of DBT in solution by similar amounts. Our findings indicate that the overall percent conversion does not give a complete picture of catalytic activity. Of the materials tested, gold was the most selective for oxidation to DBTO, with the presence of water improving the overall reaction activity.

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Section: Resultsmentioning

confidence: 99%

Comparison of Material Activity and Selectivity in the Electrocatalytic Oxidation of Dibenzothiophene

Kompanijec¹,

Swierk²

2021

J. Electrochem. Soc.

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“…Experimentally, we observe support for higher surface coverages of DBT on Au. Using the limiting current at different rotational speeds, and assuming a diffusion coefficient for DBT in acetonitrile of 2.30 × 10 −6 cm 2 s −1 , 45 we can calculate the apparent concentration using the equation (Fig. S10†):…”

Section: Resultsmentioning

confidence: 99%

Controlling product selectivity in oxidative desulfurization using an electrodeposited iron oxide film

Kompanijec¹,

Repa²,

Fredin³

et al. 2023

Dalton Trans.

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Multi-object optimization of Navy-blue anodic oxidation via response surface models assisted with statistical and machine learning techniques

et al. 2022

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Study of the electrochemical oxidation of 4,6-dimethyldibenzothiophene on a BDD electrode employing different techniques

Cited by 9 publications

References 62 publications

Comparison of Material Activity and Selectivity in the Electrocatalytic Oxidation of Dibenzothiophene

Comparison of Material Activity and Selectivity in the Electrocatalytic Oxidation of Dibenzothiophene

Controlling product selectivity in oxidative desulfurization using an electrodeposited iron oxide film

Multi-object optimization of Navy-blue anodic oxidation via response surface models assisted with statistical and machine learning techniques

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