Ammonium tetrathiomolybdate

About: Ammonium tetrathiomolybdate is a research topic. Over the lifetime, 187 publications have been published within this topic receiving 4249 citations.

Tetrathiomolybdate-Mediated Ring Opening of Isatoic Anhydrides: An Entry to S-Alkyl or S-Aryl 2-Aminobenzenecarbothioate Derivatives

Abstract: Decarboxylative thioesterification of isatoic anhydrides mediated by benzyl(triethyl)ammonium tetrathiomolybdate gave the corresponding S-alkyl or S-aryl 2-aminobenzenecarbothioate derivatives at 60 degrees C. At ambient temperature, organic disulfides were reductive cleaved in the presence of tetrathiomolybdate to generate thiolate anions in situ; this was followed by attack on isatoic anhydrides to give the corresponding S-alkyl or S-aryl 2-aminobenzenecarbothioate derivatives. Additionally, it was shown that multistep reactions could be performed with tetrathiomolybdate, starting with an alkyl halide as a precursor of an alkyl disulfide, which, in turn, was used for ring opening of isatoic anhydrides.

Strong promoting effect of H2O on coal liquefaction using water-soluble and oil-soluble Mo catalyst precursors

Abstract: Publisher Summary This chapter reviews the unusual and strong promoting effect of water on low-severity catalytic liquefaction of Wyodak sub-bituminous coal. The primary drying effect on coal conversion at 350°C is due to water removal rather than physicochemical changes within coal structure caused by drying. Prompted by this observation, the effect of water on catalytic run finds that water can have strong promoting effect on catalytic coal liquefaction with a dispersed molybdenum (Mo) sulfide catalyst at 350°C. The chapter examines the water effect using dispersed Mo catalysts generated in situ from water-soluble precursor, ammonium tetrathiomolybdate (ATTM), and an oil-soluble precursor. It describes new opportunities for developing low-severity catalytic processes for coal liquefaction that uses dispersed Mo sulfide catalysts from either water-soluble or oil-soluble precursor; adding a proper amount of water dramatically improve coal conversion at temperatures lower than the conventional processes.

An amorphous phase molybdenum trisulfide cathode material of a lithium sulfide battery and a preparation method thereof

Abstract: The invention provides an amorphous phase molybdenum trisulfide cathode material of a lithium sulfide battery and a preparation method thereof. Ammonium tetrathiomolybdate is added into deionized aqueous solution, PH is adjusted to acidity, porous carbon spheres are used for adsorption and evaporation drying solvent, the adsorbed carbon spheres are calcined in hydrogen/argon atmosphere, and annealed after calcination to obtain carbon-coated amorphous molybdenum trisulfide cathode material. The invention adopts porous hollow carbon sphere to adsorb thiomolybdate ion and calcine at high temperature, the thiomolybdate salt inside is converted into amorphous phase molybdenum trisulfide, in the process of recombination with lithium ions, S-S bond of amorphous phase molybdenum trisulfider ruptures to form short chain low sulfide and lithium composite which is not easy to dissolve in the electrolyte, thus reducing the shuttle of sulfide and overcoming the problem of cycle performance degradation caused by the large shuttle effect of the existing cathode materials of lithium-sulfide batteries.

Hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material, preparation method and application

Abstract: The invention relates to a preparation method for a hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material. The preparation method comprises the following steps: 1) dispersing ammonium tetrathiomolybdate, urea and hydrazine hydrate into N,N-dimethyl formamide so as to form a homogeneous solution; 2) transferring the solution obtained in the step 1) into a reaction kettle, and performing reaction for 8-10 hours at 160-240 DEG C; 3) after the reaction is completed, naturally cooling to the room temperature, performing solid-liquid separation, and washing and drying precipitate, thereby obtaining the hollow MoS2/MoO3 flower-like spherical heterostructure nano material. By adopting the hollow MoS2/MoO3 flower-like spherical heterostructure nano material provided by the invention, the hydrogen evolution(HER) performance of a catalyst is remarkably improved.

Lithium-ion battery anode material molybdenum disulfide/carbon and preparation method thereof

Abstract: The invention discloses a lithium-ion battery anode material molybdenum disulfide/carbon and a preparation method thereof. A dry tremella-like MoS2/C composite material is prepared by a thermal reduction method; a half-battery is prepared; the electrochemical property of the half-battery is tested; and the result shows that the half-battery is high in specific capacity and stable in cycle performance. The method is simple, reliable, good in process repeatability and high in operability, and can be widely popularized. The preparation method comprises the following steps: (1), taking a proper amount of ammonium tetrathiomolybdate, hexadecyl trimethyl ammonium bromide and silica nanospheres as raw materials; (2), preparing a sample by the thermal reduction method; and (3), removing silicon dioxide with hydrofluoric acid to obtain the required product.