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Amorphous composite material as well as preparation method and application thereof

A technology of amorphous composite materials and amorphous materials, which is applied in the field of high-selectivity 2e-oxygen reduction electrocatalyst materials and its preparation, can solve the problems of inapplicability to large-scale production, and achieve simple methods, easy commercial production, Environmentally friendly effect

Active Publication Date: 2021-02-12
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electrochemical deposition and photochemical deposition metal-organic synthesis methods are only used to prepare amorphous thin-film catalyst materials, and this method is not suitable for large-scale production. Therefore, it is very important to design and develop an electrocatalytic material suitable for large-scale production.

Method used

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  • Amorphous composite material as well as preparation method and application thereof
  • Amorphous composite material as well as preparation method and application thereof
  • Amorphous composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1 Sample 1 Preparation

[0067] A-Cu(OH) 2 / GO preparation process:

[0068] 1). Dissolution of copper ions;

[0069] CuCl 2 2H 2 O and 16mg of graphene oxide were dissolved in a mixed solution of 40ml of water and ethylene glycol (the volume ratio of ethylene glycol and water was 4:1), stirred to form 0.006M CuCl 2 Mix the solution uniformly.

[0070] 2). The solvent controls the precipitation process;

[0071] Slowly add 120 ul of ammonia water with a concentration of 28% mass fraction to the homogeneous mixed solution, adjust the pH to pH=9, stir for 10 minutes, centrifuge wash three times with deionized water, and freeze-dry to obtain a solid powder sample, which is designated as sample 1.

Embodiment 2

[0072] Embodiment 2 Sample 2~4 preparation

[0073] Concrete operation is the same as embodiment 1, and its difference is, adopt the Cu(NO of 0.001M 3 ) 2 The solution was mixed uniformly, and the prepared sample was designated as sample 2.

[0074] Concrete operation is the same as embodiment 1, and its difference is, adopt the CuCl of 0.001M 2 The solution was uniformly mixed, and the prepared sample was designated as sample 3.

[0075] Concrete operation is the same as embodiment 1, and its difference is, adopt the CuCl of 0.007M 2 The solution was uniformly mixed, and the prepared sample was designated as sample 4.

Embodiment 3

[0076] Example 3 Structural Characterization

[0077] Carry out XRD test on samples 1-4, the typical XRD spectrum is as follows figure 1 Shown, corresponding to the sample 1 in the embodiment 1. figure 1 It is shown that the prepared sample has only one obvious graphene oxide (002) plane, and there are no other obvious diffraction peaks, which indicates that the prepared sample is an amorphous phase. XRD spectra of samples 2-4 and figure 1 Similar, the only difference lies in the intensity of the diffraction peaks.

[0078] Perform AFM and corresponding height distribution tests on samples 1 to 4, typical AFM such as figure 2 As shown in (a), a typical height distribution map is as follows figure 2 Shown in (b), corresponds to sample 1 in Example 1. figure 2 (a) and figure 2 (b) shows that the thickness of graphene oxide is about 1.3 nm. AFM and height distribution maps of samples 2-4 and figure 2 (a) and figure 2 (b) similar.

[0079] Carry out XPS test on sam...

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Abstract

The invention discloses a composite amorphous material. The composite amorphous material comprises graphene oxide and amorphous metal hydroxide, wherein amorphous metal hydroxide is loaded on grapheneoxide; the graphene oxide is a nano sheet with the thickness of 0.5 to 2 nm; and the amorphous metal hydroxide is a nano-cluster. The material is used as a high-selectivity 2e-oxygen reduction electro-catalyst, and can show 95% of hydrogen peroxide selectivity in an oxygen reduction electrochemical test.

Description

technical field [0001] This application relates to a highly selective 2e - An oxygen reduction electrocatalyst material and a preparation method thereof belong to the field of chemical materials. Background technique [0002] Hydrogen peroxide is an important industrial fuel and is widely used in the synthesis of chemical products, textiles, and pulp bleaching. At present, the production of hydrogen peroxide is mainly through the anthraquinone method, which involves a series of hydrogenation and oxidation processes of anthraquinone molecules, which is not only not suitable for large-scale equipment, but also causes a lot of waste. In addition, the synthesis of hydrogen peroxide directly through hydrogen and oxygen has become an alternative method, but there is a potential danger of hydrogen and oxygen mixed explosion. Another ideal method is to produce hydrogen peroxide by electrolytic reduction of oxygen in an electrolytic cell, which uses water as a proton source and doe...

Claims

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Application Information

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IPC IPC(8): C25B1/30C25B11/091B01J23/72
CPCB01J23/72C25B1/30C25B11/04B01J35/33
Inventor 付长乐黄钧衡温珍海
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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