Preparation of highly dispersed pentlandites (M,M')(sub 9)S(sub 8) (M, M' = Fe, Co, Ni) and their catalytic properties in hydrodesulfurization

Article Abstract:

The synthesis of highly dispersed binary and ternary pentalandites (Co9S8, NiCo8S8, FeCo8S8, Ni3Co6S8, Ni4.5Fe4.5S8) is reported along with the special emphasis on the distribution of cations, and their catalytic properties in the thiophene hydrosulfurization reaction. The relation between the activities and the properties are discussed based on the extended Huckel electronic structure calculations and temperature programmed reduction measurement.

Chemical synthesis, Properties, Thiophene

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Correlation between electronic properties and hydrodesulfurization activity of 4d-transition-metal sulfides

Article Abstract:

The relationship between electronic- structure properties exhibited by 4d-transition-metal sulfides (TMSs) in connection with hydroesulfurization (HDS) catalytic activity is examined. The electronic structure is studied by means of a periodic density functional approach using a plane-wave basis set and appropriate pseudopotentials.

Sulfides, Electron configuration, Transition metal compounds, Chemical properties, Atomic properties

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Cathodic modifications of platinum surfaces in organic solvent: Reversibility and cation type effects

Article Abstract:

Atomic force microscopy (AFM) technique was employed for examining the formation of iono-platinic phases by cathodic modification of platinum surfaces. The modification begins at the interface solution platinum surface and involves the insertion of cations and salts into the platinum electrode.

Electric properties, Atomic force microscopy, Platinum compounds

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