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a rgo@pd 7 the se 2 Composite structure nanomaterials and their preparation methods and applications

A technology of composite structure and nanomaterials, applied in the direction of electrolytic components, electrodes, electrolytic process, etc., can solve the problems of electron transfer inside and at the interface of unhelpful materials, unfavorable nitrogen fixation performance, optimization, etc., and achieve continuous electrolytic stability and excellent catalytic activity , to promote the effect of electron transfer

Active Publication Date: 2021-09-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned electrocatalytic performance tests on bulk materials severely limit the intrinsic activity of the material, and because no effective composite structure is introduced, it does not help to promote the electron transfer inside and at the interface of the material, which is not conducive to the further optimization of nitrogen fixation performance.

Method used

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  • a rgo@pd <sub>7</sub> the se <sub>2</sub> Composite structure nanomaterials and their preparation methods and applications
  • a rgo@pd <sub>7</sub> the se <sub>2</sub> Composite structure nanomaterials and their preparation methods and applications
  • a rgo@pd <sub>7</sub> the se <sub>2</sub> Composite structure nanomaterials and their preparation methods and applications

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of rGO@Pd 7 Se 2 A method for preparing a composite structure nanomaterial, comprising the following steps:

[0029] Step 1: Disperse 10mg of graphene oxide (GO) in 15ml of deionized water and stir evenly;

[0030] Step 2: Add 0.05mmol selenous acid, 0.1mmol sodium tetrachloropalladate, 0.1mmol sodium citrate, 0.2mmol sodium hydroxide and 0.1mmol sodium borohydride to the solution obtained in step 1, mix and stir evenly until the color of the solution changes Stop stirring when it is black;

[0031] Step 3: transfer the mixed solution obtained in step 2 to a reaction kettle, and conduct a hydrothermal reaction at 200° C. for 5 hours;

[0032] Step 4: After the reaction, cool down to room temperature naturally, then filter the solution to obtain gray-black precipitate, wash and freeze-dry to obtain rGO@Pd 7 Se 2 Nanoparticle composite structure.

[0033] The rGO@Pd that embodiment 1 obtains 7 Se 2 X-ray diffraction (XRD) pattern of composite structure nano...

Embodiment 2

[0036] A kind of rGO@Pd 7 Se 2 A method for preparing a composite structure nanomaterial, comprising the following steps:

[0037] Step 1: Disperse 10 mg of graphene oxide (GO) in 15 ml of deionized water, and stir evenly, and stop stirring when the color of the solution turns black;

[0038] Step 2: Add 0.05mmol of selenous acid, 0.1mmol of sodium tetrachloropalladate, 0.1mmol of sodium citrate, 0.2mmol of sodium hydroxide and 0.1mmol of sodium borohydride to the solution obtained in step 1, and mix and stir evenly;

[0039] Step 3: transfer the mixed solution obtained in step 2 to a reaction kettle, and conduct a hydrothermal reaction at 300° C. for 6 hours;

[0040] Step 4: After the reaction, cool down to room temperature naturally, then filter the solution to obtain gray-black precipitate, wash and freeze-dry to obtain rGO@Pd 7 Se 2 Nanoparticle composite structure.

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Abstract

The invention provides a rGO@Pd 7 Se 2 The composite structure nano material and its preparation method and application belong to the technical field of nano material synthesis and preparation. The composite structure nanomaterial is Pd 7 Se 2 Nanoparticles uniformly anchored on reduced graphene oxide (rGO), Pd 7 Se 2 The particle size of the nanoparticles is ~100nm, and the shape is nearly cubic. The preparation method uses selenous acid and sodium tetrachloropalladate as the reaction substances, deionized water as the reaction solvent, and synthesizes rGO@Pd by one-step hydrothermal method 7 Se 2 Composite nanomaterials. And load rGO@Pd 7 Se 2 Electrodes of nanomaterials exhibit excellent catalytic performance and continuous electrolytic stability in electrocatalytic nitrogen fixation. The synthesis process is simple, the toxicity is low, the reaction conditions are mild, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of synthesis and preparation of nanomaterials, in particular to a heptapalladium diselenide-reduced graphene oxide (rGO@Pd 7 Se 2 ) preparation method of composite structure nanomaterial, and its application in electrochemical nitrogen fixation reaction. Background technique [0002] The current energy consumption model dominated by fossil fuels is unsustainable due to limited ore reserves and increasingly serious environmental pollution problems. It is imperative to find abundant clean energy to gradually replace fossil fuels. As a basic industrial raw material, ammonia also has great potential as a clean energy because of its high energy density, high production capacity, green and environmentally friendly combustion products, and more in line with the characteristics of the current industrial system. Thanks to the abundant nitrogen content in the atmosphere and the widespread use of clean energy such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/27C25B11/091
CPCC25B1/00
Inventor 熊杰郭倚天杜新川黄建文雷天宇陈伟晏超贻邬春阳王显福
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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