8 results about "Ammonia borane" patented technology

This invention discloses a bifunctional catalyst, its preparation method, and its applications. The preparation method includes: firstly, loading alumina onto SBA-15 via impregnation, followed by drying and calcination to obtain a composite support Al2O3-SBA-15; then, loading the noble metal Rh onto the composite support using a precipitation deposition method, followed by solid-liquid separation, washing, drying, calcination, and reduction treatment to obtain the Rh / Al2O3-SBA-15 bifunctional catalyst. In the catalyst prepared by this invention, the modification with Al2O3 enhances the metal-support interaction, improving the dispersion and stability of Rh. The catalyst of this invention exhibits excellent bifunctional catalytic performance, capable of efficiently catalyzing the hydrolysis of ammonia borane to produce hydrogen, and effectively reducing N-nitrosodimethylamine in water using in-situ generated hydrogen, achieving an integrated treatment process of "in-situ hydrogen production-simultaneous reduction." The preparation process of this invention is simple, convenient to operate, and operates under mild reaction conditions. The obtained catalyst has broad application prospects in the field of ammonia borane-assisted water pollutant treatment.

The application discloses a superfine cobalt phosphide nanocluster / carbon composite catalyst, a supported catalyst and a preparation method and application thereof, and belongs to the field of liquid hydrogen storage and nanometer catalyst preparation. A mild low-temperature 300-400 DEG C in-situ heat treatment strategy is adopted, so that the growth and agglomeration of metal nanometer particles under high temperature are avoided. The average size of the prepared superfine cobalt phosphide nanocluster can reach 4.40+ / -1.3 nm, the extremely small size provides a larger electrochemical active specific surface area, and catalytic active sites are fully exposed. Under the condition of 30 DEG C, the catalyst shows super-high catalytic activity for ammonia borane hydrolysis, and the conversion efficiency TOF is as high as 1188 h ‑1 , and the performance is far higher than that of most reported non-noble metal catalysts.

The application discloses a two-dimensional / three-dimensional cobaltosic oxide supported copper catalyst and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: oxidizing and calcining ZIF-67 in air to obtain worm-connected cobaltosic oxide; immersing the worm-connected cobaltosic oxide in a copper salt aqueous solution, sealing and placing, drying, and then calcining in an inert atmosphere to obtain worm-connected cobaltosic oxide supported copper; and finally reducing and treating the worm-connected cobaltosic oxide supported copper with a sodium borohydride aqueous solution at room temperature to obtain the two-dimensional / three-dimensional cobaltosic oxide supported copper catalyst. In the method, the sodium borohydride reduction treatment can not only reduce the copper oxide into metal copper nanoparticles, but also induce the worm-connected cobaltosic oxide carrier to evolve into a two-dimensional / three-dimensional composite structure. The obtained catalyst has the copper nanoparticles uniformly supported on the two-dimensional / three-dimensional cobaltosic oxide, forms a metal-carrier synergistic effect, and exhibits excellent catalytic activity in a hydrogen production reaction of catalyzing ammonia borane hydrolysis at normal temperature and pressure.

The present application relates to the field of new energy technology, in particular to a method for controlling ammonia borane hydrolysis hydrogen release in solid phase system, the solid phase system is AB@metal M / aerogel porous material; the amount of water added to the solid phase system is controlled to control the amount of AB hydrolysis hydrogen release. The AB@metal M / aerogel porous material is: AB is encapsulated in the aerogel porous material loaded with metal catalyst M. The catalyst is loaded on the aerogel porous material, and AB can be encapsulated in these aerogel porous materials due to the certain solid morphology of the aerogel porous material. The amount of water added to the AB@metal M / aerogel porous material is controlled to control the AB hydrolysis hydrogen release process. The method for controlling hydrogen release in the solid phase system can solve the problem that the liquid phase hydrogen release process is difficult to control, and can be applied to vehicle-mounted energy devices, and has the characteristics of convenient vehicle-mounted, simple operation and easy process control.

The application belongs to the technical field of hydrogen production by catalytic hydrolysis, and relates to a hydrogen production device and method by catalytic hydrolysis. The hydrogen production device by catalytic hydrolysis comprises a reaction cavity and a hydrogen storage tank which are connected with each other. A catalyst is arranged in the reaction cavity and connected with a liquid inlet chamber of an ammonia borane reaction liquid. A liquid inlet piston is arranged in the liquid inlet chamber. An air inlet, an air pressure stabilizing piston assembly and an air outlet are arranged in the hydrogen storage tank from top to bottom. The air pressure stabilizing piston assembly comprises an air pressure stabilizing piston body, a guide rod assembly, an upper limit stopper and a lower limit stopper. The upper limit stopper and the lower limit stopper are arranged on the inner wall of the hydrogen storage tank. The air pressure stabilizing piston body has a set weight and is sealingly and movably installed through the guide rod assembly, so that the air pressure stabilizing piston body can sealingly slide up and down in the hydrogen storage tank. The application discards the hydrogen supply mode of on-demand production and use of ammonia borane catalytic hydrolysis at normal temperature and pressure, replaces the use of high-pressure hydrogen storage steel cylinders, and effectively reduces the safety hazards.

This invention discloses a Pt-based crystalline-amorphous heterostructure catalyst, its preparation method, and its applications. The invention involves depositing Mo into ZIF-67 followed by calcination to obtain a solid product consisting of a porous framework formed by the accumulation of crystalline Co3O4 nanoparticles and a surface cobalt-molybdenum oxide precursor. Subsequent liquid-phase reduction transforms the cobalt-molybdenum oxide precursor into amorphous sheet-like CoMo material, which grows in situ and adheres to the surface of the porous framework, forming a crystalline-amorphous heterostructure interface. Simultaneously, Pt nanoparticles are reduced and loaded onto this interface. The resulting catalyst possesses a crystalline-amorphous composite heterostructure, with Pt highly dispersed at the heterostructure interface and strong metal-support interaction. This catalyst exhibits excellent performance in catalyzing the hydrolysis of ammonia borane to produce hydrogen at room temperature and pressure, achieving complete hydrogen release within 1.05 minutes. Furthermore, it requires low Pt dosage, has a simple preparation method, and is suitable for industrial applications.