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Nickel-cobalt-phosphorus crystal, and preparation method and application thereof

A nickel-cobalt-phosphorus crystal technology, applied in the field of nickel-cobalt-phosphorus crystals and its preparation, can solve problems such as poor catalytic activity, achieve stable catalytic performance, good catalytic activity, and good industrial application prospects

Inactive Publication Date: 2015-12-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experimental studies have shown that among non-precious metal materials, the transition metal phosphides have surpassed traditional non-precious metal catalysts such as molybdenum disulfide in electrolyzing water, but their catalytic activity is still relatively poor compared with noble metal catalysts for electrolyzing water.

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  • Nickel-cobalt-phosphorus crystal, and preparation method and application thereof
  • Nickel-cobalt-phosphorus crystal, and preparation method and application thereof
  • Nickel-cobalt-phosphorus crystal, and preparation method and application thereof

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preparation example Construction

[0041] The present invention also provides a method for preparing nickel, cobalt and phosphorus crystals, including:

[0042] Mix the nickel source, cobalt source, solvent and phosphorus source to obtain a mixed solution,

[0043] The molar ratio of the nickel source, cobalt source, and phosphorus source is x: (2-x): 2.2, where 0<x<2;

[0044] The obtained mixed solution is heated and reacted to obtain the nickel cobalt phosphorus crystal represented by formula (I),

[0045] Ni x Co (2-x) P formula (I);

[0046] Among them, 0

[0047] According to the present invention, in the present invention, a nickel source, a cobalt source, a phosphorus source and a solvent are mixed to obtain a mixed solution; the nickel source is preferably one or more of nickel acetylacetonate, nickel chloride and nickel nitrate, more preferably Nickel acetylacetonate, nickel chloride or nickel nitrate; the cobalt source is preferably one or more of cobalt acetylacetonate, cobalt chloride and cobalt nitrate...

Embodiment 1

[0055] Weigh 0.064 g nickel acetylacetonate and 0.064 g cobalt acetylacetonate into a 100 mL three-necked flask, dissolve them in 2 mL of octadecene and 3 mL of oleylamine, and add 1 mL of tri-n-octyl phosphine. Stir at room temperature for 15 minutes to mix the reactants uniformly to obtain a mixed solution;

[0056] Under the protection of argon, the mixed solution was heated to 140°C and kept for 30 minutes to remove the low-boiling solvent in the reaction, and then heated to 280°C and maintained at this temperature for 120 minutes. After the reaction, the mixture was naturally cooled to room temperature to obtain a black color. Product, the obtained black product is centrifuged, washed with toluene and absolute ethanol to obtain nickel cobalt phosphorus crystals (NiCoP), and the obtained nickel cobalt phosphorus crystals are dispersed in n-hexane and stored for later use.

[0057] Observe the obtained nickel, cobalt and phosphorus crystals with a transmission electron microscop...

Embodiment 2

[0068] Weigh 0.032 g nickel acetylacetonate and 0.096 g cobalt acetylacetonate into a 100 mL three-necked flask, dissolve them in 2 mL of octadecene and 3 mL of oleylamine, and add 1 mL of tri-n-octyl phosphine. Stir at room temperature for 15 minutes to mix the reactants uniformly to obtain a mixed solution;

[0069] Under the protection of argon, the mixed solution was heated to 140°C and kept for 30 minutes to remove the low-boiling solvent in the reaction, and then heated to 280°C and maintained at this temperature for 120 minutes. After the reaction, the mixture was naturally cooled to room temperature to obtain a black color. The resulting black product is centrifuged and washed with toluene and absolute ethanol to obtain nickel, cobalt and phosphorus crystals (Ni 0.5 Co 1.5 P), disperse the obtained nickel, cobalt and phosphorus crystals in n-hexane and store them for later use.

[0070] By testing the catalytic performance of the nickel, cobalt and phosphorus crystals prepa...

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Abstract

The invention provides a nickel-cobalt-phosphorus crystal, and a preparation method and an application thereof. The nickel-cobalt-phosphorus crystal prepared through controlling the proportions of elements in nickel-cobalt-phosphorus, the morphology and the dimension has very good catalysis activity in water electrolysis as a water electrolysis catalyst. According to the embodiment in the invention, the nickel-cobalt-phosphorus crystal has similar catalysis activity to commercial platinized carbon electrodes as a water electrolysis catalyst, can be used in electrocatalytic hydrogen evolution and oxygen production, has a stable catalysis performance and has very good industrial application prospect. Compared with traditional high temperature solid phase reaction, the nickel-cobalt-phosphorus crystal preparation method provided by the invention has the advantages of simple operating process, mild synthesis conditions, easy control of the product morphology, great shortening of the growth time of the synthesized nickel-cobalt-phosphorus crystal, reduction of the reaction temperature, energy consumption saving, high product yield, low cost and large-scale industrial production.

Description

Technical field [0001] The invention belongs to the technical field of metal phosphides, and particularly relates to a nickel-cobalt-phosphorus crystal and a preparation method and application thereof. Background technique [0002] As a kind of functional materials with magnetic, superconducting, catalytic, lithium ion storage and other properties, transition metal phosphides are widely used in the fields of magnetic devices, industrial catalysis and battery materials. Moreover, since most metal phosphides have metallic characteristics themselves, their good electrical conductivity makes them have the prerequisite to become effective catalyst materials. For a long time, the catalytic performance of metal phosphides has attracted much attention. [0003] At present, the preparation of transition metal phosphide crystals mainly uses high temperature solid phase reaction, temperature programmed reduction method and solvothermal method. According to the synthesis methods reported in ...

Claims

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Application Information

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IPC IPC(8): C01B25/08B01J27/185
Inventor 杨晴王纯德
Owner UNIV OF SCI & TECH OF CHINA
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