Preparation method for black phosphorus-activated graphene heterojunction loaded nickel nitride particles

A graphene and heterojunction technology, applied in the field of materials science, can solve the problems of high overpotential, limited hydrogen production efficiency, slow kinetics, etc., achieve the effect of simple preparation method, easy to obtain raw materials, and improve hydrogen production efficiency

Inactive Publication Date: 2019-10-15
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since OER is a four-electron transfer process, its high overpotential and slow kinetics limit the efficiency of hydrogen production, so efficient and durable electrocatalysts for oxygen evolution reaction are required in the electrolysis of water.

Method used

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  • Preparation method for black phosphorus-activated graphene heterojunction loaded nickel nitride particles
  • Preparation method for black phosphorus-activated graphene heterojunction loaded nickel nitride particles
  • Preparation method for black phosphorus-activated graphene heterojunction loaded nickel nitride particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing black phosphorus-activated graphene heterojunction loaded nickel nitride particles, the specific steps are:

[0025] (1) Preparation of black phosphorus-activated graphene heterojunction materials:

[0026] Preparation of black phosphorus: Add 4 g of red phosphorus (red phosphorus) and 60 mL of deionized water into a 100 mL hydrothermal kettle at room temperature, and conduct a hydrothermal reaction at 180°C for 15 hours to remove the oxide layer on the surface of red phosphorus. After taking it out and drying it, grind it with an agate mortar for 1 hour to obtain a black phosphorus precursor, then put the precursor in a stainless steel ball mill tank, fill it with argon gas at normal temperature and pressure for 0.5 hours, ensure that the ball mill tank is in an argon environment, and then ball mill After the tank is sealed, perform mechanical ball milling for 50 hours at a speed of 500 r / min. After the mechanical ball milling is completed, the ...

Embodiment 2

[0039] Adopt a method similar to Example 1 to prepare black phosphorus-activated graphene heterojunction loaded nickel nitride particles, the difference is that the mass ratio of the black phosphorus nanosheet material to the graphene nanosheet material is 1:0.5 , the mass ratio of black phosphorus-activated graphene heterojunction material to nickel nitride particles is 1:0.33.

Embodiment 3

[0041] Adopt a method similar to Example 1 to prepare black phosphorus-activated graphene heterojunction loaded nickel nitride particles, the difference is that the mass ratio of the black phosphorus nanosheet material to the graphene nanosheet material is 1:2 , the mass ratio of black phosphorus-activated graphene heterojunction material to nickel nitride particles is 1:0.67.

[0042] Figure 5 It is the linear sweep voltammogram and the corresponding Tafel slope diagram of black phosphorus-activated graphene heterojunction loaded nickel nitride particles in 1M KOH solution of Examples 1-3.

[0043] Wherein, the black phosphorus-activated graphene heterojunction supported nickel nitride particles (Ni 3 N / BP-AG 1), at up to 10mA cm -2 The overpotential is 233mV at the current density, and the Tafel slope is 42mV dec -1 , while the black phosphorus-activated graphene heterojunction supported nickel nitride particles (Ni 3 N / BP-AG 2), the overpotential is 308mV, and the Tafe...

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Abstract

The invention provides a preparation method for black phosphorus-activated graphene heterojunction loaded nickel nitride particles. The preparation method is characterized by comprising the followingsteps: performing mechanical ball grinding on a black phosphorus nano-sheet material and a graphene nano-sheet material which is activated through an alkaline liquid under the protection of argon to obtain a first precursor; washing, performing vacuum drying to obtain a black phosphorus-activated graphene heterojunction material; dissolving nickel nitrate hexahydrate, ammonium fluoride and urea indeionized water, performing hydrothermal reaction, and calcining to obtain nickel nitride particles; performing mechanical ball grinding on the black phosphorus-activated graphene heterojunction material and the nickel nitride particles under the protection of the argon to obtain a third precursor; washing, and performing vacuum drying to obtain the black phosphorus-activated graphene heterojunction loaded nickel nitride particles. According to the preparation method for the black phosphorus-activated graphene heterojunction loaded nickel nitride particles, the electrocatalytic oxygen evolution activity and stability of the catalyst are effectively improved, which is beneficial to improving the hydrogen production efficiency; moreover, the preparation method is simple, and raw materials are easy to obtain, so that the preparation method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to an oxygen evolution catalyst material for electrolysis of water, in particular to a method for preparing black phosphorus-activated graphene heterojunction loaded nickel nitride particles. Background technique [0002] With the continuous development of human society, the consumption of resources is increasing day by day, and the problems of energy crisis and environmental pollution are becoming more and more prominent, which seriously threaten the survival and development of human beings. Hydrogen energy is recognized as clean energy. Electrolysis of water is currently a research hotspot in hydrogen production methods. The water electrolysis reaction mainly consists of two half-reactions: the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode. Since OER is a four-electron transfer process with high overpotential and slow kinetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10C25B11/06C25B1/04
CPCB01J27/24B01J35/004B01J37/0036B01J37/10C25B1/04C25B11/091Y02E60/36
Inventor 徐群杰王啸张亚男叶文龙范金辰闵宇霖
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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