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RGO-coated Pd7Se2 composite structure nano material as well as preparation method and application thereof

A technology of composite structures and nanomaterials, applied in electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of electron transfer, optimization, and unfavorable nitrogen fixation performance in the interior and interface of unhelpful materials, achieve continuous electrolytic stability, and promote electron transfer , Excellent catalytic activity

Active Publication Date: 2021-04-09
UNIV OF ELECTRONIC 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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  • RGO-coated Pd7Se2 composite structure nano material as well as preparation method and application thereof
  • RGO-coated Pd7Se2 composite structure nano material as well as preparation method and application thereof
  • RGO-coated Pd7Se2 composite structure nano material as well as preparation method and application thereof

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 an rGO-coated Pd7Se2 composite structure nano material as well as a preparation method and application thereof, and belongs to the technical field of synthesis and preparation of nano materials. According to the composite structure nano material, Pd7Se2 nano particles are uniformly anchored on reduced graphene oxide (rGO), the particle size of the Pd7Se2 nano particles is -100nm, and the shape of the Pd7Se2 nano particles is approximately cubic. According to the preparation method, seleninic acid and sodium tetrachloropalladate are taken as reaction substances, deionized water is taken as a reaction solvent, and the nano material with the rGO-coated Pd7Se2 composite structure is synthesized in one step through a hydrothermal method. An electrode loaded with the rGO-coated Pd7Se2 nano material shows excellent catalytic performance and continuous electrolytic stability in electrocatalytic nitrogen fixation, and is simple in synthesis process, relatively low in toxicity, mild in reaction condition and low in cost.

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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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 ELECTRONIC SCI & TECH OF CHINA
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