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Bimetallic core-shell catalyst for electro-catalysis synergistic hydrogen production as well as preparation method and application of bimetallic core-shell catalyst

A core-shell catalyst, electrocatalysis technology, applied in physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of long reaction process time, increased processing time, weak superoxide radical activity, etc.

Pending Publication Date: 2021-05-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reaction process takes a long time, and the superoxide free radicals produced by side reactions are weak, which increases the processing time and the mineralization efficiency is not high

Method used

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  • Bimetallic core-shell catalyst for electro-catalysis synergistic hydrogen production as well as preparation method and application of bimetallic core-shell catalyst
  • Bimetallic core-shell catalyst for electro-catalysis synergistic hydrogen production as well as preparation method and application of bimetallic core-shell catalyst
  • Bimetallic core-shell catalyst for electro-catalysis synergistic hydrogen production as well as preparation method and application of bimetallic core-shell catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing a core-shell catalyst for electrocatalytic synergistic hydrogen production, comprising the steps of:

[0044] 1) Add 1.35g FeCl to a 50mL beaker 3 ·6H 2 O, 0.124MnCl 2 4H 2 O and 40mL ethylene glycol, stir vigorously to turn bright yellow, add 3.6gNaAC, stir well, add 10mL ethylenediamine to obtain a dark green solution, pour it into a 50mL polytetrafluoroethylene reactor, and react at a temperature of 200°C for 12h , washed with ethanol three times after cooling and dried in vacuum to obtain the bimetallic MnFe 3 o 4 nanospheres.

[0045] 2) Using 10 mg of hexachlorocyclotriphosphazene as the source of N and P, 22.5 mg of thioacetamide as the source of S, adding 50 mg of the bimetallic MnFe 3 o 4 Add 15 mL of ethanol and tetrahydrofuran at a mass ratio of 1:1 to the nanospheres as a solvent, and ultrasonicate for 5 min at an ultrasonic frequency of 50 Hz until the reactants are completely dissolved and uniformly dispersed. Then seal it wi...

Embodiment 2

[0056] A method for preparing a core-shell catalyst for electrocatalytic synergistic hydrogen production, comprising the steps of:

[0057] 1) Add 0.628g FeCl to a 50mL beaker 3 ·6H 2 O, 1.0g MnCl 2 4H 2 O and 40mL ethylene glycol, stir vigorously to turn bright yellow, add 3.6gNaAC, stir well, add 10mL ethylene glycol to obtain a dark green solution, pour it into a 50mL polytetrafluoroethylene reactor at 200°C for 12h, wash with ethanol for 3 times and vacuum Dry to obtain bimetallic MnFe 3 o 4 nanospheres.

[0058] 2) The heteroatom shell uses 20mg of hexachlorocyclotriphosphazene as the N source and P source, 45mg of thiourea as the S source, and 50mg of the above-mentioned bimetallic MnFe 3 o 4 Nano-microspheres, 15mL of ethanol and tetrahydrofuran with a mass ratio of 1:1 as a solvent, ultrasonic (50Hz) 5min completely dissolved and uniformly dispersed. Then seal it with a polyethylene film, and quickly inject 3 mL of triethylamine as an acid-binding agent with a ...

Embodiment 3

[0062] A method for preparing a multi-component heterogeneous nodule shell catalyst suitable for electric Fenton, comprising the steps of:

[0063] 1) Add 0.675g FeCl to a 50mL beaker 3 ·6H 2 O, 0.248g MnCl 2 4H 2 O and 40mL polyvinyl alcohol, stir vigorously to turn bright yellow, add 3.6gKAC, stir well, add 10mL ethylenediamine to obtain a dark green solution, pour it into a 50mL polytetrafluoroethylene reactor, react at 200°C for 24h, and ethanol after cooling After washing 3 times and drying in vacuum, the metal microsphere core (MnFe 3 o 4 ).

[0064] 2) Adopt 50mg hexachlorocyclotriphosphazene as N and P source, 112.5mg sulfonyldiphenol as S source, 250mg above-mentioned solvothermal method preparation diameter is the metal microsphere core of 50x50 ± 10nm, 30mL mass ratio is 1: 1 ethanol and tetrahydrofuran as solvents, ultrasonic (100Hz) 5min completely dissolved and uniformly dispersed. Then seal it with plastic wrap, and quickly inject 2 mL of trimethylamine a...

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Abstract

The invention discloses a bimetallic core-shell catalyst for electro-catalysis synergistic hydrogen production as well as a preparation method and application of the bimetallic core-shell catalyst. The bimetallic core-shell catalyst is formed by taking a MnFe3O4 nano-microsphere formed by polymerization of bimetallic Mn and Fe as a core and taking co-doped heteroatoms N, P and S as a shell layer, and the core-shell structure is obtained by carrying out ultrasonic treatment and reaction on N and P sources of phosphonitrilic chloride trimer, S source of thioacetamide or thiourea and MnFe3O4 nanoparticles in a solvent. The catalyst has excellent electro-catalytic performance, hydrogen production capacity and cycling stability and is not affected by electrolyte properties in the sewage treatment process as a compatible catalyst, and a cathode and an anode can be switched at will. The catalyst disclosed by the invention has a good electro-catalytic reaction and can be widely applied to wastewater treatment.

Description

technical field [0001] The invention relates to a catalyst for sewage treatment, in particular to a bimetallic core-shell catalyst for electrocatalytic synergistic hydrogen production and its preparation method and application; The multi-component heterostructure formed by the shell and the core is used in the process of direct oxygen reduction and synergistically produces hydrogen, is a nanometer material, and belongs to the technical field of wastewater degradation. Background technique [0002] The widespread destruction of the environment has aroused the attention of researchers on clean and efficient restoration to promote the sustainable development of human society. Advanced Oxidation Process (AOP S ) process to generate activated oxidants is the most effective way to degrade refractory pollutants in wastewater. Activating oxidizing agents include hydrogen peroxide (H 2 o 2 ), peroxymonosulfate (PMS) and persulfate (PS). During these advanced oxidation processes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/08C02F1/461C02F1/467C25B1/04C25B11/091C02F101/38B01J35/00
CPCB01J27/24C02F1/46109C02F1/4672C25B1/04C02F2001/46142C02F2101/38B01J35/396B01J35/33B01J35/51B01J35/40Y02E60/36
Inventor 周华晶陈元彩
Owner SOUTH CHINA UNIV OF TECH
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