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Nitrogen-phosphorus-doped carbon-coated metal phosphide as well as preparation method and application thereof

A technology of metal phosphide and carbon wrapping, which is applied in the direction of nanotechnology, electrodes, nanotechnology, etc. for materials and surface science, can solve the problems of increasing the cost of catalyst materials, environmental pollution, etc., and achieve easy operation, environmental friendliness and environmental protection The effect of little pollution

Active Publication Date: 2021-05-14
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only increases the material cost of the catalyst, but also causes environmental pollution when some toxic reagents are contaminated
Preparation of TMPs coated with N,P co-doped carbon materials using clean materials remains a great challenge

Method used

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  • Nitrogen-phosphorus-doped carbon-coated metal phosphide as well as preparation method and application thereof
  • Nitrogen-phosphorus-doped carbon-coated metal phosphide as well as preparation method and application thereof
  • Nitrogen-phosphorus-doped carbon-coated metal phosphide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a metal phosphide catalyst Co wrapped with nitrogen and phosphorus doped carbon 2 P@NPC, which is prepared by the following steps:

[0046] Weigh 0.2 g of biological material DNA and dissolve it in 50 mL of water, heat and stir at 110 °C for 10 min, then quickly put the reacted solution into a cold well at a temperature of -25 °C.

[0047] After maintaining at -25°C for 30min, take it out, return to room temperature and add 20mL of CoCl with a concentration of 20mol / L dropwise 2 The solution was stirred at room temperature for 12h. The solution was then lyophilized to obtain a purple fluffy object after the water was removed. The material was calcined at 800 °C for 2 h under the protection of argon to obtain a nitrogen-phosphorus-doped carbon-wrapped metal phosphide catalyst Co 2 P@NPC.

[0048] figure 1 It is the XRD pattern of the nitrogen-phosphorus-doped carbon-wrapped metal phosphide catalyst of Example 1. figure 1 It can be seen that...

Embodiment 2

[0061] This embodiment provides a metal phosphide catalyst Ni that is wrapped with nitrogen and phosphorus doped carbon. 2 P@NPC, which is prepared by the following steps:

[0062] Weigh 0.2 g of biological material DNA and dissolve it in 50 mL of water, heat and stir at 95 °C for 10 min, then quickly put the reacted solution into a cold well at a temperature of -30 °C.

[0063] Take it out after maintaining at -30°C for 30min, return to room temperature and add 20mL of NiCl with a concentration of 20mol / L dropwise 2 The solution was stirred at room temperature for 12h. The solution was then lyophilized to obtain a purple fluffy object after the water was removed. The material was calcined at 700 °C for 2 h under the protection of argon to obtain a nitrogen-phosphorus-doped carbon-wrapped metal phosphide catalyst Ni 2 P@NPC.

[0064] Figure 6 It is the BET diagram of the nitrogen-phosphorus-doped carbon-wrapped metal phosphide catalyst of Example 2. From Figure 6 It c...

Embodiment 3

[0066] This embodiment provides a metal phosphide catalyst Co wrapped with nitrogen and phosphorus doped carbon 2 P@NPC, which is prepared by the following steps:

[0067] Weigh 0.2g of biological material DNA and dissolve it in 50mL of water, heat and stir at 100°C for 10min, then quickly put the reacted solution into a cold well at a temperature of -35°C.

[0068] After maintaining at -35°C for 30 min, it was taken out, returned to room temperature, and 20 mL of cobalt acetate solution with a concentration of 20 mol / L was added dropwise, and stirred at room temperature for 12 h. The solution was then lyophilized to obtain a purple fluffy object after the water was removed. The material was calcined at 750 °C for 2 h under the protection of argon to obtain a nitrogen-phosphorus-doped carbon-wrapped metal phosphide catalyst Co 2 P@NPC.

[0069] Figure 7 It is the SEM image of the metal phosphide catalyst wrapped with nitrogen and phosphorus doped carbon in Example 3. Fro...

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Abstract

The invention provides a nitrogen-phosphorus-doped carbon-coated metal phosphide as well as a preparation method and application thereof. The preparation method comprises the following steps of: adding a biological material DNA into water, heating while stirring to unwind DNA double strands into single strands, keeping the temperature for a period of time, cooling, and maintaining the state of the single strands to form a DNA solution; cooling the DNA solution to room temperature, adding a metal ion solution while stirring, and freeze-drying the DNA solution after stirring reaction to obtain a fluffy material; and carrying out high-temperature carbonization on the fluffy material under the protection of protective gas to form the nitrogen-phosphorus-doped carbon-coated metal phosphide. The nitrogen-phosphorus-doped carbon-coated metal phosphide prepared by the preparation method can be used as a catalyst for hydrogen production by electrolysis of water, and has relatively high catalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst for electrolyzing water to produce hydrogen, and belongs to the technical field of catalyst preparation. Background technique [0002] Hydrogen production by electrolysis of water is a clean, efficient and sustainable new energy technology, and an effective way to solve current energy and environmental problems. However, the kinetics of the water splitting reaction is very difficult, which greatly limits its application in industry. The use of catalysts to accelerate the electrolysis of water can effectively improve the efficiency of hydrogen production and reduce the voltage required for electrolysis of water. Therefore, more and more researchers are devoting themselves to developing an efficient and stable catalyst for water electrolysis. So far, the recognized noble metal Pt and Pt-like materials are the most advanced HER catalysts. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/04Y02E60/36
Inventor 马靖文李响刘坚孙源卿王军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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