Tri-functional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst as well as preparation method and application thereof

A photonic crystal, double-doping technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effect of large surface area, favorable for exposure and utilization, and improved dispersibility

Active Publication Date: 2020-07-31
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of existing highly dispersed materials as catalysts, and provide a trifunctional cobalt nitrogen double-doped carbon-based photonic crystal catalyst and its preparation method and application

Method used

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  • Tri-functional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst as well as preparation method and application thereof
  • Tri-functional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst as well as preparation method and application thereof
  • Tri-functional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 3

[0037] Example 1 Preparation of trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst

[0038] A method for preparing a trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst, comprising the following steps:

[0039] S1. Place the carbon fiber cloth in acetone and ethanol for ultrasonic cleaning for 15 minutes, dry, apply voltage for electrochemical oxidation treatment, ultrasonically clean with deionized water and ethanol, and dry, arrange the carbon fiber in a petri dish, add Monodisperse silica microspheres (diameter is 220nm) dispersion liquid, leave standstill for 48h, the dispersion liquid promptly forms silica photonic crystal template on the surface of the fiber of carbon fiber cloth and in the space among the fiber self-assembly after drying;

[0040] S2. Add cobalt nitrate hexahydrate and zinc nitrate hexahydrate into methanol-dimethylformamide mixed solvent (volume ratio 3:1), stir well to obtain a clear solutio...

Embodiment 2 3

[0043] Example 2 Preparation of trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst

[0044] A method for preparing a trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst, comprising the following steps:

[0045] S1. Place the carbon fiber cloth in acetone and ethanol for ultrasonic cleaning for 15 minutes, dry, apply voltage for electrochemical oxidation treatment, ultrasonically clean with deionized water and ethanol, and dry, arrange the carbon fiber in a petri dish, add Monodisperse silica microspheres (diameter is 220nm) dispersion liquid, leave standstill for 48h, the dispersion liquid promptly forms silica photonic crystal template on the surface of the fiber of carbon fiber cloth and in the space among the fiber self-assembly after drying;

[0046] S2. Add cobalt nitrate hexahydrate and zinc nitrate hexahydrate into methanol-dimethylformamide mixed solvent (volume ratio 3:1), stir well to obtain a clear solutio...

Embodiment 3 3

[0049] Example 3 Preparation of trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst

[0050] A method for preparing a trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst, comprising the following steps:

[0051] S1. Place the carbon fiber cloth in acetone and ethanol for ultrasonic cleaning for 15 minutes, dry, apply voltage for electrochemical oxidation treatment, ultrasonically clean with deionized water and ethanol, and dry, arrange the carbon fiber in a petri dish, add Monodisperse silica microspheres (diameter is 220nm) dispersion liquid, leave standstill for 48h, the dispersion liquid promptly forms silica photonic crystal template on the surface of the fiber of carbon fiber cloth and in the space among the fiber self-assembly after drying;

[0052] S2. Add cobalt nitrate hexahydrate and zinc nitrate hexahydrate into methanol-dimethylformamide mixed solvent (volume ratio 3:1), stir well to obtain a clear solutio...

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Abstract

The invention discloses a tri-functional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst as well as a preparation method and application thereof. The catalyst is prepared by growing a zeolite imidazolate framework structure material precursor in a silicon dioxide photonic crystal template in a confinement manner; and heating, pyrolyzing, carbonizing and removing the template inan argon atmosphere. The catalyst has a unique three-dimensional ordered honeycomb hierarchical pore structure, is a three-functional catalyst capable of simultaneously and efficiently electrocatalyzing oxygen reduction, oxygen evolution and hydrogen evolution reaction, and has good metal site dispersibility and electrocatalytic activity, and the preparation method of the catalyst is simple and easy to implement and low in cost. Therefore, the catalyst prepared by the method has a wide application prospect in preparation of clean energy devices.

Description

technical field [0001] The invention belongs to the technical field of catalysts. More specifically, it relates to a trifunctional cobalt-nitrogen double-doped carbon-based photonic crystal catalyst and its preparation method and application. Background technique [0002] Electrocatalytic oxygen reduction, oxygen evolution, and hydrogen evolution reactions are the core reactions of various clean energy devices such as fuel cells, water splitting devices, or metal-air batteries. It is very important and urgent to develop efficient and stable bi / trifunctional catalysts for these energy devices. Although commercial noble metal-based catalysts (such as Pt / C and RuO 2 etc.) have good catalytic activity for one or two of electrocatalytic oxygen reduction, oxygen evolution and hydrogen evolution reactions. However, the commercialization of these expensive catalysts is limited by the low earth reserves and poor stability of noble metals. Therefore, exploring new materials for no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/04B01J35/10C25B1/04C25B11/03C25B11/06H01M4/96H01M12/06H01M12/08
CPCB01J27/24B01J35/0033B01J35/0066B01J35/04C25B1/04C25B11/031C25B11/091H01M4/96H01M12/06H01M12/08Y02E60/36
Inventor 余丁山方正松杨美佳李靖袁中柯
Owner SUN YAT SEN UNIV
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