Method for producing hydrogen peroxide by electrocatalytic reduction of oxygen

An electrocatalysis, hydrogen peroxide technology, applied in the field of electrochemistry, can solve the problems of high cost, high energy consumption, dangerous transportation, etc., and achieve the effects of high selectivity, large specific surface area and fast diffusion rate

Inactive Publication Date: 2018-09-07
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the demand for the use of hydrogen peroxide, more than 3.5 million metric tons of hydrogen peroxide are produced in the world every year. The main industrial production method is the anthraquinone method, but its energy consumption is high, the cost is high, and the transportation is dangerous.

Method used

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  • Method for producing hydrogen peroxide by electrocatalytic reduction of oxygen
  • Method for producing hydrogen peroxide by electrocatalytic reduction of oxygen
  • Method for producing hydrogen peroxide by electrocatalytic reduction of oxygen

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In this example, the US PINE rotating disc electrode and H-type electrolytic cell were used to conduct electrocatalytic tests. This embodiment uses a kind of organic molecule 1,3,5-three (4-carboxyphenyl) benzene (benzene-1,3,5-tribenzoate) as a ligand (hereinafter referred to as: H 3 BTB), based on the hexanuclear metal hafnium cluster (hereinafter referred to as: Hf 6 ) as a metal node, a metal organic layer (Metal Organic Layers-MOL) compound (hereinafter referred to as: Hf-BTB-MOL) was synthesized. Hf-BTB-MOL has a 3,6-connected two-dimensional kgd topology network structure. Hf-BTB-MOL is a network-like film that can be used to modify the electrode surface. f 6 μ in SBU 3 The protons of -OH can dissociate at neutral pH, where MOL is negatively charged. [Ni II (H 2 O) 6 ] 2+ The complex can be adsorbed on the MOL on the electrode surface by Coulomb attraction and reduce O by hydrogen bonding 2 . Ni II The dynamic site segregation leads to an efficient an...

Embodiment 2

[0057] In this example, the American PINE rotating disk electrode pair Hf-TPY-MOL-Fe was used in 0.5M KNO 3 Electrocatalytic tests were carried out in the electrolyte. This embodiment uses a kind of organic molecule 4-benzoic acid-2,2,2-terpyridine-5,5-dicarboxylic acid as a ligand (hereinafter referred to as: H 3 TPY), based on the hexanuclear metal hafnium cluster (hereinafter referred to as: Hf 6 ) as a metal node, a metal organic layer (Metal Organic Layers-MOL) compound (hereinafter referred to as: Hf-TPY-MOL) was synthesized. Hf-TPY-MOL has a 3,6-connected two-dimensional kgd topology network structure. Hf-TPY-MOL is a network-like film that can be used to modify the electrode surface. f 6 μ in SBU 3 The protons of -OH can dissociate at neutral pH, where MOL is negatively charged. Hf-TPY-MOL is similar in structure to Hf-BTB-MOL in Example 1. Hf-TPY-MOL can adsorb Fe 3+ ions for electrocatalytic oxygen reduction to produce hydrogen peroxide. At the same time, th...

Embodiment 3

[0066] In this example, the US PINE rotating disk electrode is used to pair the Zr-HHTP MOF material at 0.5M KNO 3 Electrocatalytic tests were carried out in the electrolyte. In this embodiment, 2,3,6,7,10,11-hexahydroxytriphenylene hydrate (hereinafter referred to as: HHTP) is used as ligand and ZrOCl 2 metal ions, using the bottom-up approach to synthesize ultrathin Zr-HHTP MOF materials using LB technology, which can have a good catalytic effect in oxygen reduction electrocatalysis and produce H with a selectivity of up to 80%. 2 o 2 .

[0067] 1. Pre-experiment preparation:

[0068] First, add 300mL H 2 Add 300uL 0.01mol / L metal ion solution to O, and this solution is the subphase solution. Second, wash the sink part and sliding barrier of the KSV membrane analyzer PTFE in one direction with ethanol, and then wash with deionized water. Add the prepared subphase solution into the tank until the liquid level is about 1-2mm above the tank level. Soak the Wilhelmy piece...

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Abstract

The invention discloses a method for producing hydrogen peroxide by electrocatalytic reduction of oxygen, wherein the method comprises the following steps: (1) an electrocatalytic thin film with a single-layer thickness is prepared, wherein the electrocatalytic thin film is composed of a first organic bridging ligand and a metal organic single layer formed by metal clusters connected with the first organic bridging ligand, or composed of a second organic bridging ligand containing hydroxyl groups and a metal organic single layer composed of first metal ions connected with the second organic bridging ligand; and (2) oxygen is catalyzed to be reduced into hydrogen peroxide by the electrocatalytic thin film. The ultra-thin two-dimensional metal organic single-layer material electrocatalytic thin film is synthesized by the chemical method, has the characteristics of large specific surface area, fast diffusion rate and the like, thereby facilitating the electrocatalytic oxygen reduction process; hydrogen peroxide can be produced with high efficiency and high selectivity, and hydrogen peroxide with the highest selectivity of 80% can be produced in the process of oxygen reduction.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a method for producing hydrogen peroxide by electrocatalyzing oxygen reduction. Background technique [0002] Hydrogen peroxide is considered one of the greenest oxidizing agents because only water is a by-product of its oxidation. The application of hydrogen peroxide is mainly reflected in the fields of bleaching, wastewater treatment, sterilization and disinfection. In order to meet the demand for hydrogen peroxide, more than 3.5 million metric tons of hydrogen peroxide are produced every year in the world. The main industrial production method is the anthraquinone method, but its energy consumption is high, the cost is high, and the transportation is dangerous. Therefore, generating H in situ in the application scenario 2 o 2 of great value. [0003] The electrocatalytic reduction of oxygen via a two-electron pathway to generate hydrogen peroxide in si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/30C25B11/06C25B11/02
CPCC25B1/30C25B11/02C25B11/04
Inventor 汪骋王婷婷
Owner XIAMEN UNIV
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