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Preparation method and application of transition metal phosphide Co2P

A transition metal and phosphide technology, applied in the field of transition metal phosphide synthesis, can solve the problems of unfavorable transition metal phosphide wide production and application, inability to form mass production, harsh production conditions, etc., and achieves good electrochemical reversibility and cost. Low, inexpensive effect

Inactive Publication Date: 2010-10-13
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned reaction method either requires a higher reaction temperature (generally above 1000 °), or a long reaction time to obtain a good crystal, and has the disadvantages of high raw material cost, harsh production conditions, complex process, few controllable factors and inability to obtain a good crystal. The formation of mass production and other shortcomings is not conducive to the widespread production and application of transition metal phosphides

Method used

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  • Preparation method and application of transition metal phosphide Co2P
  • Preparation method and application of transition metal phosphide Co2P
  • Preparation method and application of transition metal phosphide Co2P

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Take by weighing 0.562g cobalt sulfate heptahydrate, 0.332g ammonium hypophosphite (Co 2+ :H 2 PO 2 - = 1:2), add 25ml of deionized water to dissolve it completely, stir at 65°C for half an hour, and then put it into an oven for drying; put the dried precursor powder into a tube furnace (Tianjin City Zhonghuan Experimental Electric Furnace Co., Ltd. ZK-1BS), under the protection of argon atmosphere, calcined at 550°C for 6 hours; cooled to room temperature, washed the resulting product with deionized water three times, and then vacuum-dried it in an electric vacuum oven with a vacuum degree of -0.1MPa, the transition metal phosphide Co can be prepared 2 p.

[0021] figure 1 For the XRD figure of gained material, adopt Rigaku D / Max Ш type X-ray diffractometer (Cu target k α Rays, wavelength λ=0.15418nm). Compared with the standard card, it can be seen that the synthesized material is orthorhombic (space group Pnam 62).

Embodiment 2

[0023] Take by weighing 0.595g cobalt chloride hexahydrate, 0.652g sodium hypophosphite (Co 2+ :H 2 PO 2 - =1:2.46), add 30ml of water, stir at 65°C for half an hour, then put it into an oven for drying; put the dried precursor powder into a tube furnace (ZK-1BS of Tianjin Zhonghuan Experimental Electric Furnace Co., Ltd. ) under the protection of argon atmosphere at 600°C for 4 hours; cooled to room temperature, washed with deionized water for three times and then vacuum-dried in an electric vacuum oven with a vacuum degree of -0.1MPa to obtain Transition metal phosphides Co 2 p.

[0024] figure 2 For the prepared Co 2 SEM image of P.

Embodiment 3

[0026] Take by weighing 0.562g cobalt sulfate heptahydrate, 0.326g sodium hypophosphite (Co 2+ :H 2 PO 2 - =1:1.54), add 30ml of water, stir at 65°C for half an hour, then put it into an oven for drying; put the dried precursor powder into a tube furnace (ZK-1BS of Tianjin Zhonghuan Experimental Electric Furnace Co., Ltd. ) under the protection of an inert gas at 650°C for 3 hours; cooled to room temperature, washed with deionized water for three times and then vacuum-dried in an electric vacuum oven with a vacuum degree of -0.1MPa to obtain Transition metal phosphides Co 2 p.

[0027] Accurately weigh Co 2 P, mixed with Ni carbonyl powder in a mass ratio of 1:3; then pressed into a disc with a diameter of 1 cm under a pressure of 30 MPa; clamp the disc with two pieces of nickel foam with a diameter of about 2 cm, and compact it with a pressure of 20 MPa; Finally, spot weld metal nickel sheet on the edge of nickel foam to make nickel metal hydride battery negative electr...

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Abstract

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.

Description

【Technical field】 [0001] The present invention relates to transition metal phosphide synthesis technology, particularly a kind of transition metal phosphide Co 2 The preparation method and application of P. 【Background technique】 [0002] Transition metal phosphides, as good catalysts, are widely used in hydrodesulfurization and dehydrogenation, and have made great contributions to the increasingly serious energy crisis and environmental problems. At the same time, transition metal phosphides are widely used in electroplating materials due to their good corrosion resistance. Some transition metal phosphides have attracted great interest due to their strong hydrogen adsorption capacity and good electrochemical catalytic activity in the electrochemical oxidation of hydrogen, and have potential value as anode materials for Ni-MH batteries. [0003] The traditional preparation methods of transition metal phosphides include: direct reduction of phosphine or phosphorus pentachlo...

Claims

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Application Information

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IPC IPC(8): C01B25/08H01M10/30
CPCY02E60/124Y02E60/10
Inventor 焦丽芳袁华堂王一菁杜红梅彭文修王庆红宋大卫
Owner NANKAI UNIV
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