The invention relates to a preparation method of Ni-P nano-particles having an eggshell structure and applied to catalytic hydrogen production. The method comprises steps as follows: a nickel sulfate solution is put into a magnetic water bath kettle for constant-temperature water bath heating at a temperature of 70-85 DEG C; a sodium dodecyl benzene sulfonate solution is injected into the nickel sulfate solution, and the mixture is stirred till foam disappears gradually; a sodium hydroxide solution is added to the obtained solution, and suspended Ni(OH)2 colloid particles are obtained; the obtained Ni(OH)2 colloid particles are stirred, polyvinylpyrrolidone is then added, the mixture is uniformly stirred, and then a NaH2PO2 solution and 1 g/L of a H2PdCl4 solution are added; an obtained mixed solution is heated and stirred, and a black final product is obtained and left to stand for 2-3 hours; sediment is washed and dried, and obtained black powder is a final product. The Ni-P nano-particles having the eggshell structure and good performance are prepared from cheap reactant with a simple preparation method.

Preparation method of Ni-P nano-particles having eggshell structure and applied to catalytic hydrogen production

The invention provides a preparation method of nickel phosphide hollow nano microspheres. The preparation method comprises the following steps: dissolving nickel chloride hexahydrate, sodium hypophosphite and anhydrous sodium acetate in deionized water to obtain a precursor solution; adjusting the pH value of the precursor solution by using a potassium hydroxide solution to obtain a mixed solution; transferring the mixed solution into an oil bath to react; after the reaction is finished, filtering and washing the product, and freeze-drying the product; sintering the freeze-dried product under inert gas to obtain a mixture of elemental nickel and nickel phosphide; and immersing the mixture in hydrochloric acid to be treated to obtain pure-phase nickel phosphide, freeze-drying the pure-phase nickel phosphide to obtain uniform hollow nickel phosphide nano microspheres. A phase separation reaction is adopted, the crystallization degree of the nickel phosphide is controlled by changing the sintering temperature, so as to obtain the nickel phosphide nano microspheres with good crystallinity.

Preparation method of nickel phosphide hollow nano microspheres

The invention discloses a preparation method of nickel phosphorus catalyst applied to high-efficient electro-catalysis and hydrogenation The method includes steps of adding sodium hydroxide solutionin an inorganic nickel salt solution; stirring evenly to obtain suspending flocculent Ni (OH)2 sediment; transferring the obtained flocculent Ni (OH)2 sediment in a stainless steel hydrothermal reaction kettle to perform hydrothermal reaction; after hydrothermal reaction, washing the obtained Ni (OH)2 colloid and then mixing with sodium hypophosphite solution; freeze-drying the mixed solution, andcollecting the freeze-dried mixture powder; then performing low-temperature solid phase phosphating reaction on the mixture powder in a vacuum tubular furnace, so as to obtain the final nickel phosphorus electro-catalysis and hydrogen evolution material The preparation method is simple and convenient to operate, low in cost of reaction raw material, safe and environment-friendly; the nickel phosphorus catalyst has excellent electro-catalysis and hydrogen evolution performance

Preparation method of nickel phosphorus catalyst applied to high-efficient electro-catalysis and hydrogenation

The invention discloses a preparation method of a flower-like PbS/Ni2P composite material The method comprises the following steps: firstly, preparing uniform flower-like lead sulfide by virtue of a solvothermal method; carrying out hydro-thermal treatment on the flower-like lead sulfide, nickel chloride hexahydrate, a cetyl trimethyl ammonium bromide and lauryl sodium sulfate mixed surfactant and yellow phosphorus at a certain chemical stoichiometric ratio; and drying the obtained product in vacuum, so as to prepare the flower-like PbS/Ni2P composite material An effective three-dimensional space is provided for nickel phosphide by the flower-like lead sulfide; the technical problem of relatively low catalytic performance caused by agglomeration of nickel phosphide nano-particles is solved; and the method is available in raw material, and simple in preparation method

Preparation method of flower-like PbS/Ni2P composite material

The invention discloses a preparation method of an oxyvanadium phosphate catalyst. The preparation method disclosed by the invention comprises the following steps: carrying out material synthesis reaction on phosphorus sources such as sodium hypophosphite and ammonium hypophosphite and one or more vanadium sources in vanadium pentoxide and ammonium metavanadate in multiple kinds of ionic liquid and eutectic mixtures, using assisted microwave heating means in the reaction process, preparing to obtain an oxyvanadium phosphate precursor VOHPO4.1/2H2O, and calcining the oxyvanadium phosphate precursor in air containing 1.5% of butane, thereby obtaining the final catalyst oxyvanadium phosphate. The ionic liquid thermosynthesis method adopted in the invention has the advantages of simplicity andconvenience in operation (normal pressure), high specific surface area of the prepared material and the like. Hypophosphite (H2PO , phosphorus of +1 valence state) with high reducing property serves as a reducing agent and a phosphorus source, so that the reaction temperature can be greatly reduced, and the energy consumption is reduced.

Preparation method of oxyvanadium phosphate catalyst and application thereof in catalytic oxidation reaction

The invention provides a novel method for preparing nickel phosphide (Ni12P5) by the low-temperature solvothermal method. The method of the invention is characterized by dissolving anhydrous nickel chloride as a nickel source and sodium hypophosphite as a phosphorus source in a high-boiling-point organic solvent at the room temperature, stirring the materials until the organic solvent is transparent, sealing the organic solvent in a high-pressure kettle and heating up to 140-240 DEG C and reacting for certain time to obtain Ni12P5. The method of the invention is characterized by using a high-boiling point organic substance as the solvent, the reaction conditions are simple and mild and the generated Ni12P5 is the nano-particle with the size being 50nm to 200nm and the specific surface area being larger. The method is favorable for hydrodesulfurization, selective hydrogenation and other catalytic hydrogenation reactions, thus having wider application range.

Qingxin Guan

Papers

Novel method for preparing nickel phosphide by low-temperature reduction