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

A technology for hydrazine hydrate to catalyze water and nanometer metals. It is applied in the direction of physical/chemical process catalysts, phosphides, chemical/physical processes, etc. It can solve the problems of low hydrogen release efficiency and the need to improve the stability of non-precious metal catalysts. , to achieve the effect of safe use, low cost and cheap raw materials

Inactive Publication Date: 2015-12-09
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the use of metal nanoparticles to catalyze ammonia borane water to explain the hydrogen system still has the following problems: First, it is often necessary to rely on rare and precious metals to achieve high catalytic hydrogen release efficiency, and the efficiency of hydrogen release using non-noble metal catalysts is still low. high
Second, the stability of non-precious metal catalysts needs to be improved

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of nanometer metal phosphide catalyst nickel phosphide (Ni 2 P), its preparation method is as follows:

[0047] 1) Preparation of catalyst precursor

[0048] In a round-bottomed flask, 1000.0 mg of nickel chloride hexahydrate, 250 mg of sodium citrate, 45 mL of distilled water, and 2.8 g of sodium hydroxide were added, and the mixture was stirred at room temperature for 40 min to obtain a green colloid. The green colloid in the mixture was collected by centrifugation, and after washing the green colloid with a large amount of distilled water, it was fully dried at 373K to remove water to obtain the precursor nickel hydroxide of the catalyst.

[0049] 2) Reduction of precursor by gas-solid reaction method

[0050] Thoroughly grind and mix 200mg nickel hydroxide and 1000mg sodium hypophosphite to obtain light green powder. Under argon flow, the green powder was placed in a porcelain boat of a tube furnace, heated slowly from room temperature to 543K, and maintai...

Embodiment 2

[0053] A kind of nanometer metal phosphide catalyst nickel phosphide (Ni 2 P), its preparation method is as follows:

[0054] 1) Preparation of catalyst precursor

[0055] In a round bottom flask, 200.0 mg of nickel sulfate, 150 mg of sodium citrate, 135 mL of distilled water, and 0.6 g of sodium hydroxide were added, and the mixture was stirred at room temperature for 10 min to obtain a green colloidal precipitate. The green colloidal precipitate in the mixture was collected by centrifugation, and after washing the green colloidal precipitate with a large amount of distilled water, it was fully dried at 353K to remove water to obtain the precursor nickel hydroxide of the catalyst.

[0056] 2) Reduction of precursor by gas-solid reaction method

[0057] 50mg of nickel hydroxide and 250mg of sodium hypophosphite were fully ground and mixed to obtain light green powder. Under argon flow, the green powder was placed in a porcelain boat of a tube furnace, slowly heated from roo...

Embodiment 3

[0059] A kind of nano metal phosphide catalyst iron phosphide (FeP), its preparation method is as follows:

[0060] 50mg of anhydrous ferric trichloride and 280mg of sodium hypophosphite were fully ground and mixed to obtain brown yellow powder. Under argon flow, the powder was placed in a porcelain boat of a tube furnace, heated slowly from room temperature to 623K, and maintained at the heating temperature for 1 h. After the reaction is completed, slowly cool down to room temperature, and wash the product with a large amount of distilled water and dilute hydrochloric acid to fully remove the inorganic salts inside, that is, to obtain a nanometer iron phosphide (FeP) catalyst.

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Abstract

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.

Description

technical field [0001] The invention relates to the field of hydrogen fuel cells. More specifically, it relates to a nano-metal phosphide M x P y Catalyst ammonia borane or hydrazine hydrate catalyzed water interpretation hydrogen system and its application. Background technique [0002] Hydrogen storage is one of the problems restricting the arrival of hydrogen economy. Storing hydrogen at high pressure or low temperature is neither safe nor cheap. How to store it safely and efficiently is the technical bottleneck facing the application of hydrogen energy in portable power sources and vehicle fuel cells. At present, a lot of research involves the storage and release of hydrogen in chemical hydrogen storage materials, looking for chemical hydrogen storage materials with high hydrogen content and extremely small relative molecular weight, and what methods are used to make the chemical hydrogen storage materials work under normal pressure and low temperature. The rapid and...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/14C01B3/06C01B25/08
CPCY02E60/36Y02P20/584
Inventor 付文甫彭成云
Owner YUNNAN NORMAL UNIV
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