Monatomic catalyst for preparing hydrogen peroxide through electro-catalysis, preparation method and application thereof

A technology of hydrogen peroxide and catalyst, which is applied in the field of electrocatalysis, can solve the problems of low utilization rate of catalyst, and achieve the effect of improving synthesis purity, simple process and low price

Active Publication Date: 2021-09-21
LINKWAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The size of supported transition metal catalysts widely used at present is usually at the nanoscale, because the adsorption and catalysis process mainly occurs on the surface of the catalyst, and the surface atoms of nanoscale particles only account for a small part of the total number of atoms, resulting in a relatively low utilization rate of the catalyst. Low

Method used

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  • Monatomic catalyst for preparing hydrogen peroxide through electro-catalysis, preparation method and application thereof
  • Monatomic catalyst for preparing hydrogen peroxide through electro-catalysis, preparation method and application thereof
  • Monatomic catalyst for preparing hydrogen peroxide through electro-catalysis, preparation method and application thereof

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Embodiment 1

[0044] A preparation method of a single-atom catalyst for electrocatalytically preparing hydrogen peroxide, comprising the following steps:

[0045] (1) Preparation of nitrogen-doped porous carbon carrier precursor: 100 g of melamine was weighed, ultrasonically dispersed for 10 min to uniformly disperse it in an aqueous solution, configured as a 10 g / L carrier precursor, and stirred for 2 h to obtain solution A.

[0046] (2) Preparation of metal single-atom precursor by chemical precipitation method: 20ml of 20% sodium bicarbonate solution was slowly added dropwise to 100ml of 5g / L copper acetylacetonate and 5g / L iron acetylacetonate mixed solution at a rate of 10 μL / sec to Stir and mix at a speed of 500 rpm, heat the mixture to 60° C., continue to stir at the same speed for 2 h, and cool to room temperature to prepare a mixture B.

[0047] (3) Preparation of single-atom catalyst precursor: Add solution B dropwise to solution A, wherein the mass ratio of transition metal to su...

Embodiment 2

[0050] A preparation method of a single-atom catalyst for electrocatalytically preparing hydrogen peroxide, comprising the following steps:

[0051] (1) Preparation of nitrogen-doped porous carbon carrier precursor: Weigh 100 g of urea, ultrasonically disperse it in the aqueous solution for 10 min, and prepare a 10 g / L carrier precursor, and stir for 2 h to obtain solution A.

[0052] (2) Preparation of metal single-atom precursor by chemical precipitation method: 20ml of 20% sodium bicarbonate solution was slowly added dropwise to 100ml of 5g / L copper acetylacetonate and 5g / L iron acetylacetonate mixed solution at a rate of 10 μL / sec to Stir and mix at a speed of 500 rpm, heat the mixture to 60° C., continue to stir at the same speed for 2 h, and cool to room temperature to prepare a mixture B.

[0053] (3) Preparation of single-atom catalyst precursor: Add solution B dropwise to solution A, wherein the mass ratio of transition metal to support is 1:200, continue to stir at a...

Embodiment 3

[0056] A preparation method of a single-atom catalyst for electrocatalytically preparing hydrogen peroxide, comprising the following steps:

[0057] (1) Preparation of nitrogen-doped porous carbon carrier precursor: Weigh 100 g of humic acid, ultrasonically disperse it in the aqueous solution for 10 min, configure it as a 10 g / L carrier precursor, and stir for 2 h to obtain solution A.

[0058] (2) Preparation of metal single-atom precursor by chemical precipitation method: 30ml of 20% sodium bicarbonate solution was slowly added dropwise at a rate of 10μL / sec to 100ml of 10g / L cobalt acetylacetonate, 10g / L iron acetylacetonate and 5g / L The L manganese acetylacetonate mixed solution was stirred and mixed at a speed of 500 rpm, the temperature of the mixed solution was raised to 60° C., continued to be stirred at the same speed for 2 h, and cooled to room temperature to obtain a mixed solution B.

[0059] (3) Preparation of single-atom catalyst precursor: Add solution B dropwis...

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Abstract

The invention discloses a monatomic catalyst for preparing hydrogen peroxide through electro-catalysis and a preparation method and application thereof, and belongs to the technical field of electro-catalysis. The monatomic catalyst is composed of a carrier and transition metal, the carrier is nitrogen-doped porous carbon, the transition metal is one or more of Cu, Co, Fe and Mn, and the transition metal is fixed on the surface of the carrier in a monatomic form. The monatomic catalyst has high activity and high stability, and has optimal activity and selectivity in acidic ORR, the current and selectivity can be stabilized for more than 10 h, H2O2 of more than 3500 ppm can be accumulated, the selectivity exceeds 91% in a very wide voltage range, and the generation rate of the H2O2 corresponding to 550 mmol g <-1 > h <-1 > is achieved. The electro-catalysis device prepared from the monatomic catalyst can be widely applied to wastewater treatment, and has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a single-atom catalyst for electrocatalytically preparing hydrogen peroxide, a preparation method and an application thereof. Background technique [0002] Hydrogen peroxide is an important inorganic chemical product, which is widely used in the fields of textile, paper making, military industry, medicine, food processing and environmental protection. The decomposition products of hydrogen peroxide are oxygen and water, which has no secondary pollution to the environment and belongs to green chemicals. Currently, the global H 2 o 2 The annual utilization rate is about 4 million tons, and there is great hope for continued growth in the future. [0003] The main method of existing hydrogen peroxide production is the anthraquinone method. Although the anthraquinone method has the advantages of low product cost and low energy consumption, it has a larger potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/30C25B1/50C25B11/091
CPCC25B1/30C25B1/50C25B11/091
Inventor 赵超王晶黄红锋吴宇波
Owner LINKWAY TECH CO LTD
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