Showing papers on "Ammonium tetrathiomolybdate published in 2008"
TL;DR: TTM is a copper-chelating drug that is capable of removing a copper ion from copper-thiolate clusters, such as SOD1, and it is found that TTM exerted therapeutic benefits in a mouse model of familial ALS.
52 citations
TL;DR: In this article, ammonium and tetraalkylammonium tetrathiomolybdates impregnated with nickel nitrate were used as precursors of NiMo sulfide catalysts.
Abstract: Ammonium and tetraalkylammonium tetrathiomolybdates impregnated with nickel nitrate were used as precursors of unsupported NiMo sulfide catalysts. The precursors were decomposed either in situ during the course of a dibenzothiophene (DBT) hydrodesulfurization (HDS) test or ex situ through sulfidation by H2S/H2 (15% v/v H2S). The catalysts were characterized by thermogravimetric analysis, N2 adsorption, scanning electron microscopy (SEM), and X-ray diffraction. Textural and catalytic properties of these NiMo catalysts were strongly influenced both by the nature of the precursor and the activation procedure. For ex-situ activated NiMo catalysts, the use of carbon-containing tetraalkylammonium thiosalts as precursors did not lead to a significant improvement in HDS activity. For in situ activated NiMo catalysts, the role of carbon is more complex. The use of tetramethyl- or tetrapropylammonium tetrathiomolybdate salts led to a poor final HDS activity while using tetrabutylammonium tetrathiomolybdate, a net increase in HDS activity was observed compared to the use of the non-carbon containing ammonium tetrathiomolybdate. This was related to the development of a mesoporous structure and to a high increase in surface area. This result is in agreement with those found previously for CoMo catalysts and confirms that tetraalkylammonium tetrathiomolybdate salts with long alkyl chains lead to Co- or Ni-promoted MoS2-based catalysts with enhanced HDS activity if in situ activated.
37 citations
TL;DR: In this paper, a thermal decomposition of ammonium tetrathiomolybdate in inert gas at 723-773 K and activated by procedures involving evacuation at 7 23 K and/or reduction at different temperatures, predominately 573 K.
25 citations
TL;DR: The organic ammonium tetrathiomolybdates N-methylethylenediammonium (N-Me-enH2) (1), N-(3-aminopropyl)propane-1,3-diaminium-tetrathio-bdate (dipnH2)[MoS4] (2), 4-(2-ammonioethyl)piperazin-1-polyamide (PPA)-1-EtNH3) (3), 2,2′-imin
18 citations
TL;DR: In this paper, an ammonium tetrathiomolybdate (ATTM) is treated with cetyltrimethylammonium chloride (CTAC) using several ATTM/CTAC ratios.
15 citations
01 Jan 2008
TL;DR: In this paper, an aqueous solution of ammonium tetrathiomolybdate, (NH4)2MoS4, and colloidal silica, SiO2, was ultrasonically nebulized using a household humidifier; the resulting aerosol droplets are heated in a furnace where solvent evaporation and precursor decomposition occurs, yielding a MoS2/SiO2 composite.
Abstract: Highly porous, nanostructured MoS2 spheres have been prepared by ultrasonic spray pyrolysis (USP), an aerosol synthesis technique.[1] An aqueous solution of ammonium tetrathiomolybdate, (NH4)2MoS4, and colloidal silica, SiO2, was ultrasonically nebulized using a household humidifier; the resulting aerosol droplets are heated in a furnace where solvent evaporation and precursor decomposition occurs, yielding a MoS2/SiO2 composite. Leaching of the colloidal SiO2 with hydrofluoric acid, HF, results in a porous, high surface area MoS2 network. The resulting material is a highly active hydrodesulfurization catalyst.