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Nickel nitride nanometer composite electrocatalytic material, and preparation method and application thereof

An electrocatalytic material and nanocomposite technology, applied in the field of catalysis, can solve problems such as limiting catalyst performance and hindering electron transfer, and achieve the effects of improving electron transfer efficiency, reducing consumption, and low cost

Inactive Publication Date: 2018-07-31
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the gap in work function, such a composite catalyst usually forms a Schottky barrier at the interface between the semiconductor and the metal, which hinders electron transfer, thereby limiting the full performance of the catalyst.

Method used

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  • Nickel nitride nanometer composite electrocatalytic material, and preparation method and application thereof
  • Nickel nitride nanometer composite electrocatalytic material, and preparation method and application thereof
  • Nickel nitride nanometer composite electrocatalytic material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ni 3 The preparation method of N / Pt nanocomposite catalytic material, the steps are as follows:

[0028] 1. Weigh 2.1g of nickel sulfate hexahydrate, 0.32g of sodium hydroxide and 0.24g of urea in a molar ratio of 2:2:1, add them to 25mL of absolute ethanol, and stir thoroughly to obtain a uniformly mixed solution;

[0029] 2. Put the mixed solution into the reaction kettle and react at 170°C for 24 hours;

[0030] 3. After the reaction was completed, the reaction product was ultrasonically washed 5 times with distilled water and absolute ethanol respectively, put into a drying oven, and dried at a constant temperature of 80°C for 6 hours.

[0031] 4. Press the obtained powder sample into tablets and put it into a vacuum tube furnace for roasting with a vacuum degree of 5×10 -4Pa, raise the temperature to 450°C, keep the temperature for 2h, and obtain the nickel nitride sample after natural cooling.

[0032] 5. Platinum nanoparticles were deposited on the surface of ...

Embodiment 2

[0034] Ni 3 The preparation method of N / Pt nanocomposite catalytic material, the steps are as follows:

[0035] 1. Weigh 1.9016g of nickel chloride hexahydrate, 0.32g of sodium hydroxide and 0.24g of urea in a molar ratio of 2:2:1, add them to 25mL of absolute ethanol, and stir thoroughly to obtain a uniformly mixed solution;

[0036] 2. Put the mixed solution into the reaction kettle and react at 150°C for 30 hours;

[0037] 3. After the reaction is completed, the reaction product is ultrasonically washed 4 times with distilled water and absolute ethanol respectively, put into a drying oven, and dried at a constant temperature of 60°C for 8 hours.

[0038] 4. Press the obtained powder sample into tablets and put it into a vacuum tube furnace for roasting with a vacuum degree of 3×10 -4 Pa, raise the temperature to 400°C, keep the temperature for 3h, and obtain the nickel nitride sample after natural cooling.

[0039] 5. Platinum nanoparticles were deposited on the surface ...

Embodiment 3

[0041] Ni 3 The preparation method of N / Pt nanocomposite catalytic material, the steps are as follows:

[0042] 1. Weigh 2.1g of nickel sulfate hexahydrate, 0.45g of potassium hydroxide and 0.24g of urea in a molar ratio of 2:2:1, add them to 25mL of absolute ethanol, and stir thoroughly to obtain a uniformly mixed solution;

[0043] 2. Put the mixed solution into the reaction kettle and react at 200°C for 20 hours;

[0044] 3. After the reaction was completed, the reaction product was ultrasonically washed 6 times with distilled water and absolute ethanol, respectively, put into a drying oven, and dried at a constant temperature of 100°C for 5 hours.

[0045] 4. Press the obtained powder sample into tablets and put it into a vacuum tube furnace for roasting with a vacuum degree of 7×10 -4 Pa, raise the temperature to 500°C, keep the temperature for 3h, and obtain the nickel nitride sample after natural cooling.

[0046] 5. Platinum nanoparticles were deposited on the surfa...

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Abstract

The invention provides a nickel nitride nanometer composite electrocatalytic material, and a preparation method and application thereof. The structure of the nickel nitride nanometer composite electrocatalytic material belongs to a hexagonal crystal system, and the nickel nitride nanometer composite electrocatalytic material has a particle size of 100-200 nm. The preparation method comprises the following steps: preparation of a nickel nitride nanomaterial; sintering of nickel nitride nanomaterial; and deposition of platinum nanoparticles. The catalyst is prepared by compounding the nickel nitride nanomaterial and metal platinum particles (Ni3N / Pt); nickel nitride has high electrical conductivity and can form an electronic channel without hindrance by the Schottky barrier after compoundingwith Pt; and appropriate metal hydroxide catalytic active sites are cooperatively utilized so as to effectively improve electron transfer efficiency during electrolysis of water, so startup overpotential and the consumption of the precious metal Pt in electrolysis of water for hydrogen production can be reduced.

Description

technical field [0001] The invention relates to the technical field of catalysis, and more specifically, to a metal / nickel nitride composite nanomaterial and its preparation method and application. Background technique [0002] In recent years, due to the extensive exploitation and use of fossil fuels, excessive carbon dioxide emissions have caused climate problems such as global warming, which urgently requires people to develop sustainable new energy sources to replace fossil energy sources. Hydrogen energy, as a high-energy-density and environmentally friendly energy source, is considered to be a very potential substitute. Its development and utilization are of great significance for reducing carbon dioxide emissions and thereby slowing down the global greenhouse effect. Among the many hydrogen production and hydrogen production methods, alkaline electrocatalytic hydrogen production has attracted extensive attention because of its production safety and high product purity...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/34C25B1/04C25B11/08
CPCC25B1/04C25B11/04B01J27/24B01J37/348B01J35/33Y02E60/36
Inventor 郭振刚赵旭东卢嘉豪
Owner TIANJIN CHENGJIAN UNIV
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