The invention relates to a preparation method of transition metal phosphide Co2P, which includes the following steps that: (1) cobalt salt and hypophosphite as mixing precursors are dissolved in deionized water, and are stirred until the cobalt salt and the hypophosphite are completely dissolved; (2) the produced precursor solution is dried; (3) the dried precursor powder is loaded into a tube furnace, and is calcined under the argon atmosphere; (4) the precursor powder is cooled to the room temperature, the produced product is washed by deionized water and then dried under vacuum, and thereby the transition metal phosphide Co2P is produced. The invention has the following advantages that: the sources of the main materials needed by preparation are rich, the prices are low, and therefore the cost is low; the technique is simple, steps, such as high temperature and high pressure and temperature programming, are not needed, consequently, the preparation flow is simplified, and energy consumption is reduced; in the process of preparation, the environment cannot be polluted, and therefore the invention is suitable for mass production; and when being used for simulating the nickel-metal hydride battery, the prepared product can show good electrochemical invertibility.

Preparation method and application of transition metal phosphide Co2P

The invention discloses an ammonia borane or hydrazine hydrate catalytic hydrolysis hydrogen release system containing a nano-metal phosphide MxPy catalyst and an application of the catalytic hydrolysis hydrogen release system. The system comprises the nano-metal phosphide catalyst, ammonia borane or hydrazine hydrate, and water, wherein the nano-metal phosphide catalyst can be represented as MxPy, M is Fe, Co, Ni or Cu, x is larger than or equal to 1 and smaller than or equal to 20, and y is larger than or equal to 1 and smaller than or equal to 10. The nano-metal phosphide MxPy catalyst with the low cost is used for catalyzing hydrolysis of ammonia borane or hydrogen release of hydrazine hydrate, and the cost is low. The catalyst is stable and safe in property, the efficiency is high when the catalyst is applied to catalytic hydrogen release, raw materials required by preparation are cheap, and a preparation method is simple. The catalytic hydrogen release system adopts heterogeneous catalytic reactions, and recycling of the catalyst is facilitated.

Ammonia borane or hydrazine hydrate catalytic hydrolysis hydrogen release system containing nano-metal phosphide MxPy catalyst and application of catalytic hydrolysis hydrogen release system

Preparation method of thermometal phosphide hydrofining catalyst

The invention discloses a preparation method of a nickel phosphide nano film. The method comprises the following steps: (1) cleaning and drying the foam nickel; (2) using the foam nickel after cleaning and drying in the step (1) as an anode, and conducting anodic oxidation by using a DC stable power supply in an oxalic acid solution to obtain nickel oxalate @ nickel foam; (3) placing the nickel oxalate @ nickel foam prepared in the step (2) in the middle of a tube furnace, placing sodium hypophosphite in the downstream of the tube furnace, and setting temperature control procedures in an inert gas stream as below: heating at the rate of 2-4 DEG C / min to 380-450 DEG C, maintaining for 2-4 h, and then cooling to room temperature naturally to obtain the nickel phosphide nano film. The method employs first anodic oxidation, and then low temperature phosphatization to prepare the nickel phosphide nano film. Compared with other methods, the method has no addition of nickel source in the preparation process, and is simple, rapid effective and economical.

Preparation method and application of nickel phosphide nano film

The invention relates to a method for preparing small-crystal-size SAPO-34 zeolite, which comprises the following steps that: the small-crystal-size SAPO-34 zeolite can be obtained through hydrothermal synthesis gelling and aging treatment, hydrogen peroxide oxidation treatment, ultrasonic dispersion and vacuum drying. Compared with the prior art, the invention has simple preparation process, easy condition control and lower raw material cost, the crystal size of the small-crystal-size SAPO-34 zeolite is 300-500nm, and the distribution of crystals is uniform; and the zeolite can be used for reactions which utilize the conversion of methanol to prepare ethylene, propylene and other low-carbon olefins.

Method for preparing small-crystal-size SAPO-34 zeolite

The present invention provides a novel method of using hypophosphite precursor thermal decomposition to prepare for Ni2P. The method uses nickel salt and hypophosphite as a mixed precursor, and the precursor is processed for simple low temperature treatment to synthesize non-support type Ni2P catalyst; a support dipped with precursor solution is calcined to prepare for support type Ni2P catalyst. The novel method is characterized in that the technology is very simple; the complex steps, such as high temperature, high pressure, temperature programming, and the like, are not required; just the simple heat treatment under normal pressure is required. Required raw materials have low prices and are safe; required equipments have low cost; the production process causes no pollution to the environment; the novel method is fit for mass industrial production well. The catalyst can be widely used for oil hydrogenation treatment due to good HDS and HDN activity.

Hypophosphite precursor heat decomposition method for preparing Ni2P catalyst

The invention provides a novel method for preparing nickel phosphide (Ni2P) by utilizing phosphine produced by thermal decomposition of sodium hypophosphite to reduce nickel oxide precursor In the method, nickel nitrate is adopted as a nickel source and then roasted to obtain nickel oxide, and the obtained nickel oxide is dipped into sodium hypophosphite solution to obtain the nickel oxide precursor, and simple low temperature thermal treatment of the nickel oxide precursor is carried out so as to synthesize supported and unsupported Ni2P The invention has the characteristics of simple process, low Ni2P preparation temperature, short production period, without the complex steps of temperature programming, and the like as well as just simple thermal treatment at normal temperature Raw materials used in the method are low in price and safety, and devices used in the method are low in cost The catalyst can be widely used for hydrogenation treatment of oils due to higher hydrodesulfurization and hydrodenitrogenation activities

Method for preparing Ni2P by reducing nickel oxide precursor through thermal treatment at low temperature

The invention provides a new method for preparing a catalyst of supported copper phosphide or non-supported copper phosphide (Cu3P) by the prosoma pyrolytic process of hypophosphite. The invention is characterized in that: the process adopted is simple; complicated steps such as high temperature, high pressure and temperature programming are not necessary; and the supported copper phosphide or non-supported copper phosphide can be prepared only under normal pressure by the pyrolytic process. The materials are low in cost and safe and the cost of equipment is low. Therefore, the method is very suitable for large-scale production. Copper phosphide can improve the clinkering performance of 316L stainless steel and can serve as a reinforcing agent in the production of high speed steel (HSS) composite materials. Due to the good performances of circulation and reversibility, copper phosphide can serve as the potential electrode material for cathode of the lithium ion battery.

Preparation method of copper phosphide (Cu3P) catalyst with hypophosphite by prosoma pyrolytic process

The invention provides a process for preparing SAPO-34 molecular sieve with small crystals, which is the process for rapidly synthesizing SAPO-34 molecular sieve with small crystals under the condition of ultrasonic wave ageing. The SAPO-34 molecular sieve with small crystals prepared through the invention can be rapidly synthesized in a comparatively short time, and the synthesized molecular sieve is uniform in dispersion. The crystal size of the invention is about one half of that of SAPO-34 molecular sieve prepared by the conventional hydrothermal method. Simultaneously, the crystallization temperature and pressure of the molecular sieve synthesized by the hydrothermal method are reduced, which enables the process for preparation can be widely applied in industrial production. The molecular sieve can be used in reaction of preparing light olefins, such as ethylene, propylene and the like from conversion of methanol.

Method for preparing small crystal grain SAPO-34 molecular screen

The invention provides a new method for preparing Cu3P by using thermal decomposition of a mixed precursor of sodium hypophosphite and copper oxide. The method comprises the following steps: roastingcopper nitrate to obtain copper oxide, and then soaking the copper oxide in sodium hypophosphite solution to obtain the mixed precursor; and performing simple heat treatment to the mixed precursor inthe nitrogen protective atmosphere in the static state to synthesize the loaded and the non-loaded Cu3P. The invention has the characteristics of safe raw materials, low cost, low preparation temperature of Cu3P, short production period and no flowing nitrogen gas used during the preparation process. Due to better cycle performance and reversibility than that of graphite, the Cu3P in the lithium ion battery can be taken as the potential cathode electrode material.

Wei Li

Papers

Hypophosphite precursor heat decomposition method for preparing Ni2P catalyst

Method for preparing Ni2P by reducing nickel oxide precursor through thermal treatment at low temperature

Preparation method of copper phosphide (Cu3P) catalyst with hypophosphite by prosoma pyrolytic process

Method for preparing small crystal grain SAPO-34 molecular screen

Method for preparing loaded and non-loaded Cu3P by adopting copper oxide precursor reduction method