Nitrogen/sulfur co-doped carbon-supported iron monatomic catalyst as well as preparation method and application thereof

A co-doping and catalyst technology, applied in the field of nanomaterials, can solve the problems of low selectivity and poor stability, and achieve the effects of good reproducibility, high controllability, good electrochemical performance and stability

Active Publication Date: 2021-04-02
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Despite progress, single atoms as electrocatalysts for the electrochemical reduction of O 2 Prepare H 2 o 2 , still face the problems of low selectivity and poor stability

Method used

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  • Nitrogen/sulfur co-doped carbon-supported iron monatomic catalyst as well as preparation method and application thereof
  • Nitrogen/sulfur co-doped carbon-supported iron monatomic catalyst as well as preparation method and application thereof
  • Nitrogen/sulfur co-doped carbon-supported iron monatomic catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 1.050g of ferric nitrate nonahydrate, 0.278g of fumaric acid and 0.196g of 1,2-benzisothiazol-3-one in order and dissolve them in 50mL of 70°C deionized aqueous solution, stir well 30min; the obtained mixed solution was transferred to a 100mL hydrothermal kettle, and hydrothermally reacted at 110°C for 6h, and the obtained sample was filtered and dried to obtain the initial product, a nanorod-shaped sulfur-doped metal-organic framework;

[0035] (2) The primary product obtained in step (1) was vacuum-sealed, then put into a tube furnace, and calcined at a high temperature of 700 ° C for 2 h, and the heating rate was 2 ° C min -1 ; After the sample was calcined, it was etched with 6M hydrochloric acid for 24 hours, washed with deionized water until neutral, and dried to obtain a nitrogen / sulfur co-doped carbon-supported iron single atom catalyst.

[0036] Scanning electron microscopy and transmission electron microscopy were used to observe the surface morphology...

Embodiment 2

[0039] According to the preparation process of Example 1, the calcination temperature in step (2) was changed to 600° C. to obtain the catalyst.

Embodiment 3

[0041] According to the preparation process of Example 1, the calcination temperature in step (2) was changed to 800° C. to obtain the catalyst.

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Abstract

The invention relates to the technical field of nano materials, and discloses a nitrogen / sulfur co-doped carbon-supported iron monatomic catalyst as well as a preparation method and application thereof, wherein the preparation method comprises the steps: carrying out a hydrothermal reaction on an iron salt, fumaric acid and 1,2-benzisothiazolin-3-one to obtain a primary product, filtering and drying the primary product, calcining, pickling and drying to obtain the nitrogen / sulfur co-doped carbon-supported iron monatomic catalyst, anchoring iron in the catalyst in a nitrogen / sulfur co-doped hollow rod-like nano carbon structure in a monatomic form, and ensuring that the atomic ratio of nitrogen to sulfur is (1.8-2.2):1. The H2O2 selectivity is 92% or above when the catalyst is applied to electrocatalytic reduction of oxygen into hydrogen peroxide, and excellent electrochemical performance and stability are shown.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nitrogen / sulfur co-doped carbon-supported iron single atom catalyst and its preparation method and application. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) as an environment-friendly oxidizing agent and chemical bleaching agent are widely used in chemical industry, papermaking, textile, food, medicine, military, environmental protection and other fields. Anthraquinone production of H 2 o 2 It is one of the most mature production methods in this industry in the world at present, but the catalyst in the anthraquinone method is easy to agglomerate, crush and poison; the H generated in the production process 2 o 2 Co-existing with organic solvents, it is difficult to separate, and some organic solvents are toxic, so they are dangerous, which limits their wide commercial application. The electrochemical cathode reduces oxygen to produce H 2 o 2 The meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/30C25B11/054C25B11/065C25B11/075B82Y40/00
CPCB82Y40/00C25B1/30
Inventor 侯阳李燕杨彬雷乐成
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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