Selective promoting effect on alkyldibenzothiophenes hydrodesulfurization pathways

Bataille, F.; Mijoin, Jérôme; Lemberton, J.L.; Pérot, G.; Berhault, Gilles; Lacroix, Michel; Maugé, François; Kasztelan, S.; Breysse, M.

doi:10.1016/s0167-2991(00)80900-3

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…In the present study, we have selected cobalt complexes because they have been at the basis of Taube's pioneering work on ETRs, and they have also been reported to form ISCs with oxide surfaces. , Furthermore, they are practically relevant to many catalytic systems. , Here, we report on (i) the spectroscopic characterization and the electrochemical behavior of the bis-ethylenediaminedichloro cobalt complexes cis - and trans -[Co(en) 2 Cl 2 ]Cl in solution, (ii) the preparation of a well-defined system by adsorption of the cobalt complex on γ-alumina and the determination of the adsorption mechanism, and (iii) the characterization of its electrochemical behavior, in particular its redox potential, as a function of its adsorption state.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)₂Cl₂]Cl on γ-Alumina: Influence of the Alumina Ligand on Co^(III)/(II) Redox Potential

Vivier¹,

Aguey²,

Fournier³

et al. 2005

J. Phys. Chem. B

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UV-visible and Raman spectroscopies as well as electrochemical techniques have been used to characterize cis- and trans-[Co(III)(en)2Cl2]Cl (en=ethylenediamine) complexes and the gamma-alumina-supported cis-Co((III)) complex. It is shown that the electrochemical reduction of these complexes occurs according to a multistage mechanism involving two electrochemical steps, with the formation of a dimer that was characterized by UV-visible spectroscopy (intervalence band at 670 nm). The apparent standard redox potential for each step has been determined, and experimental results reveal that cis and trans complexes present similar electrochemical characteristics. It is also shown that the deposition of trans-[Co(III)(en)2Cl2]+ on gamma-alumina leads to an inner-sphere complex (ISC) in a cis configuration in which Cl- ligands are substituted by OH or O- surface groups of alumina. These changes in the coordination sphere of the complex induce a substantial decrease of its apparent redox potential since it is -0.63 V/SCE (saturated calomel electrode) for the gamma-alumina-supported cis-Co(III) complex, whereas values of -0.17 and -0.35 V/SCE were determined in dimethyl sulfoxide (DMSO) for the trans and cis precursor complexes, respectively.

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Section: Introductionmentioning

confidence: 99%

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)₂Cl₂]Cl on γ-Alumina: Influence of the Alumina Ligand on Co^(III)/(II) Redox Potential

Vivier¹,

Aguey²,

Fournier³

et al. 2005

J. Phys. Chem. B

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On-site low-pressure diesel HDS for fuel cell applications: Deepening the sulfur content to ⩽1ppm

Alsolami

Carneiro

Moulijn

et al. 2011

Fuel

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Selective promoting effect on alkyldibenzothiophenes hydrodesulfurization pathways

Cited by 2 publications

References 13 publications

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)₂Cl₂]Cl on γ-Alumina: Influence of the Alumina Ligand on Co^(III)/(II) Redox Potential

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)₂Cl₂]Cl on γ-Alumina: Influence of the Alumina Ligand on Co^(III)/(II) Redox Potential

On-site low-pressure diesel HDS for fuel cell applications: Deepening the sulfur content to ⩽1ppm

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Selective promoting effect on alkyldibenzothiophenes hydrodesulfurization pathways

Cited by 2 publications

References 13 publications

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)2Cl2]Cl on γ-Alumina: Influence of the Alumina Ligand on Co(III)/(II) Redox Potential

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)2Cl2]Cl on γ-Alumina: Influence of the Alumina Ligand on Co(III)/(II) Redox Potential

On-site low-pressure diesel HDS for fuel cell applications: Deepening the sulfur content to ⩽1ppm

Contact Info

Product

Resources

About

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)₂Cl₂]Cl on γ-Alumina: Influence of the Alumina Ligand on Co^(III)/(II) Redox Potential

Spectroscopic and Electrochemical Study of the Adsorption of [Co(en)₂Cl₂]Cl on γ-Alumina: Influence of the Alumina Ligand on Co^(III)/(II) Redox Potential