N-doped porous carbon coated Fe and Co bi-metal nanoparticle catalyst and preparation method thereof

A bimetallic nano-catalyst technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of poor ORR performance and OER performance, and can not provide enough activity for bimetallic doped catalysts. Unsatisfactory and other problems, to achieve the effect of simple hole making process, improved stability, and avoiding direct contact

Inactive Publication Date: 2018-09-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its ORR performance and OER performance are poor and still need to be further improved.
[0004] In summary, although bimetallic doped catalysts have better ORR and OER stability, their activity still cannot meet the needs of practical applications.
The reason may be that the current preparation method cannot provide enough active site species for bimetallic doped catalysts.

Method used

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  • N-doped porous carbon coated Fe and Co bi-metal nanoparticle catalyst and preparation method thereof
  • N-doped porous carbon coated Fe and Co bi-metal nanoparticle catalyst and preparation method thereof
  • N-doped porous carbon coated Fe and Co bi-metal nanoparticle catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: G-Fe-Co@NC-1:1-900-800 (G is glucose, Fe-Co@NC-1:1 refers to FeCl in the raw material 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The molar mass ratio of O is 1:1 and FeCl is added first 3 ·6H 2 (O, 900 means the first pyrolysis temperature is 900°C, 800 means the second pyrolysis temperature is 800°C)

[0044] Put urea in a tube furnace under nitrogen protection at 5°C for min -1 Calcined for 4 hours at a temperature of 550°C to obtain g-C 3 N 4 ; Mix 20ml of water and 10ml of ethanol to obtain solution A, take 100mg of g-C 3 N 4 , 125mg FeCl 3 ·6H 2 O and 500 mg of glucose were dissolved in solution A, and then heated in an oil bath at 80°C for 8 hours to obtain solution B, and the uniformly mixed solution B was transferred to a petri dish, and dried in an air oven at 80°C for 10 hours to obtain a catalyst precursor① . Put the catalyst precursor ① in a mortar, grind it evenly, put it in a quartz boat, and put it under the protection of nitrogen at 5°C for ...

Embodiment 2

[0045] Example 2: G-Fe-Co@NC-2:1-900-800 (G is glucose, Fe-Co@NC-2:1 refers to FeCl in the raw material 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The molar mass ratio of O is 2:1 and FeCl is added first 3 ·6H 2 (O, 900 means the first pyrolysis temperature is 900°C, 800 means the second pyrolysis temperature is 800°C)

[0046] Put urea in a tube furnace under nitrogen protection at 5°C for min -1 Calcined for 4 hours at a temperature of 550°C to obtain g-C 3 N 4 ; Mix 20ml of water and 10ml of ethanol to obtain solution A, take 100mg of g-C 3 N 4 , 250mg FeCl 3 ·6H 2 O and 500 mg of glucose were dissolved in solution A, and then heated in an oil bath at 80°C for 8 hours to obtain solution B, and the uniformly mixed solution B was transferred to a petri dish, and dried in an air oven at 80°C for 10 hours to obtain a catalyst precursor① . Put the catalyst precursor ① in a mortar, grind it evenly, put it in a quartz boat, and put it under the protection of nitrogen at 5°C for ...

Embodiment 3

[0047] Example 3: G-Fe-Co@NC-2:3-900-800 (G is glucose, Fe-Co@NC-2:3 refers to FeCl in the raw material 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The molar mass ratio of O is 2:3 and FeCl is added first 3 ·6H 2 (O, 900 means the first pyrolysis temperature is 900°C, 800 means the second pyrolysis temperature is 800°C)

[0048] Put urea in a tube furnace under nitrogen protection at 5°C for min -1 Calcined for 4 hours at a temperature of 550°C to obtain g-C 3 N 4 ; Mix 20ml of water and 10ml of ethanol to obtain solution A, take 100mg of g-C 3 N 4 , 125mg FeCl 3 ·6H 2 O and 500 mg of glucose were dissolved in solution A, and then heated in an oil bath at 80°C for 8 hours to obtain solution B, and the uniformly mixed solution B was transferred to a petri dish, and dried in an air oven at 80°C for 10 hours to obtain a catalyst precursor① . Put the catalyst precursor ① in a mortar, grind it evenly, put it in a quartz boat, and put it under the protection of nitrogen at 5°C for ...

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Abstract

The invention discloses a N-doped porous carbon coated Fe and Co bi-metal nanoparticle catalyst and a preparation method of the N-doped porous carbon coated Fe an Co bi-metal nanoparticle catalyst, and belongs to the field of energy materials and electrochemistry. The catalyst takes glucose as the C source, g-C3N4 as the N source, the C source and the template, F3Cl3.6H2O and Co(NO3)2.6H2O are metal sources, a high-temperature stepwise calcining method is used to prepare the N-doped porous carbon coated Fe and Co Fe-Co@NC catalyst, and the catalyst is in a three-dimensional porous unordered stacking structure. Fe and Co exists in the forms of Fe0.3Co0.7, Fe2O3, and Co, and is evenly coated in the N-doped porous carbon. Compared with the commonly used Pt-based catalyst, the ORR (Overall Response Rate) performance in an alkaline medium is not much different from that of the commercial Pt / C catalysis, the OER (Oxygen Enhancement Ratio) performance is far better than that of the Pt / C catalyst, and the stability and the methanol tolerant property are better. Compared with the commonly seen bi-metal alloy catalyst, the catalyst has more active species, and the specific surface area is larger. In addition, the cost of the raw materials of the catalyst is low, the source of the raw materials is wide, the preparation process is simple and is favorable for large-scale production, and thecatalyst has a higher practical value.

Description

technical field [0001] The invention belongs to the field of energy materials and electrochemistry, and relates to an electrocatalyst for oxygen reduction reaction and oxygen evolution reaction in the fields of fuel cells, electrolyzed water and metal-air batteries, and a preparation method thereof. Background technique [0002] Fuel cells, metal-air batteries, and electrolyzed water have become research hotspots in the field of new energy because of their convenience, no pollution, reliable performance, and high energy density. However, the slow kinetics and high overpotentials of oxygen electrode reactions (here specifically referred to as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER)) of these devices hinder their commercial use. process. The key to solving this problem lies in the development of highly efficient and low-cost catalysts for ORR and OER to improve their working efficiency. At present, Pt-based and Ru / Ir-based catalysts are the best c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/96H01M8/1011B82Y30/00
CPCB82Y30/00H01M4/88H01M4/9041H01M4/96H01M8/1011Y02E60/50Y02P70/50
Inventor 李光兰袁丽芳陈文雯杨贝贝徐晓存
Owner DALIAN UNIV OF TECH
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