FeNi/N-C high-dispersion core-shell structure catalyst and preparation method thereof

A core-shell structure and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of full exposure of unfavorable active sites, uneven catalyst particle size, and experimental methods that need to be improved, etc. problems, to achieve the effects of easy realization of large-scale production, inhibition of growth and agglomeration, and simple and controllable preparation methods

Active Publication Date: 2018-11-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process conditions for preparing catalysts by electrospinning technology are not easy to control, which makes the size of catalyst partic

Method used

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  • FeNi/N-C high-dispersion core-shell structure catalyst and preparation method thereof
  • FeNi/N-C high-dispersion core-shell structure catalyst and preparation method thereof
  • FeNi/N-C high-dispersion core-shell structure catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Example 1: Fe 2 Ni 1 / N-C-800(Fe 2 Ni 1 Refers to the FeCl in the raw material 3 ·6H 2 O and NiCl 2 ·6H 2 The molar ratio of O is 2:1, N is dicyandiamide, the molar ratio of N to the total amount of metal is about 150:1, C is glucose, the mass ratio of N to C is 15:1, and 800 refers to the pyrolysis temperature at 800°C)

[0048] 0.0216g FeCl 3 ·6H 2 O and 0.0095g NiCl 2 ·6H 2 Dissolve O in 20mL deionized water to obtain solution A; then weigh 1.5g of dicyandiamide and 0.1g of glucose and add them separately under the condition of magnetic stirring to obtain solution B. Stir in an oil bath at 80°C for 3h to fully dissolve Mix well; dry the mixed solution in an air drying oven at 80°C for 12 hours to obtain a catalyst precursor; place the dried precursor in a mortar, grind it evenly and place it in a quartz boat, and store it under nitrogen protection at 3°C min -1 Calcined at 800°C for 2 hours, then naturally cooled to obtain Fe 2 Ni 1 / N-C-800 catalyst. ...

Embodiment 2

[0049] Embodiment 2: Fe / N-C-800 (Fe refers to FeCl in the raw material 3 ·6H 2 O, N is dicyandiamine, the molar ratio of N to metal Fe is about 150:1, C is glucose, the mass ratio of N to C is 15:1, 800 means the pyrolysis temperature is 800°C)

[0050] 0.032g FeCl 3 ·6H 2 Dissolve O in 20mL deionized water to obtain solution A; then weigh 1.5g of dicyandiamide and 0.1g of glucose and add them separately under the condition of magnetic stirring to obtain solution B. Stir in an oil bath at 80°C for 3h to fully dissolve Mix uniformly; transfer the uniformly mixed solution to a petri dish, and dry it in an air drying oven at 80°C for 12 hours to obtain a catalyst precursor; place the dried precursor in a mortar, grind it evenly, and place it in a quartz boat. 3°C min under nitrogen protection -1 The temperature was programmed to 800°C for calcination for 2 hours, and the Fe / N-C-800 catalyst was obtained after natural cooling.

Embodiment 3

[0051] Embodiment 3: Ni / N-C-800 (Ni refers to NiCl in the raw material 2 ·6H 2 O, N is dicyandiamide, the molar ratio of N to metal Ni is about 150:1, C is glucose, the mass ratio of N to C is 15:1, 800 means the pyrolysis temperature is 800°C)

[0052] 0.028g NiCl 2 ·6H 2Dissolve O in 20mL deionized water to obtain solution A; then weigh 1.5g of dicyandiamide and 0.1g of glucose and add them separately under the condition of magnetic stirring to obtain solution B. Stir in an oil bath at 80°C for 3h to fully dissolve Mix uniformly; transfer the uniformly mixed solution to a petri dish, and dry it in an air drying oven at 80°C for 12 hours to obtain a catalyst precursor; place the dried precursor in a mortar, grind it evenly, and place it in a quartz boat. 3°C min under nitrogen protection -1 The temperature was programmed to 800°C for calcination for 2 hours, and the Ni / N-C-800 catalyst was obtained after natural cooling.

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Abstract

The invention discloses a FeNi/N-C high-dispersion core-shell structure catalyst and a preparation method thereof. The FeNi/N-C high-dispersion core-shell structure catalyst takes dicyandiamide, glucose, ferric salt and nickel salt as precursors, and is prepared through a one-step high-temperature roasting method; the catalyst takes FeNi nano particles as a core, takes a nitrogen doped carbon layer as a shell; and the obtained core-shell structure nano particles are uniformly dispersed on the surface of a graphene sheet layer with high electrical conductivity. The raw materials for catalyst preparation are wide in source, and are low in cost; the preparation method is simple and controllable, and easily realizes large-scale production; the catalyst has relatively high ORR/OER electro-catalytic activity, is good in methanol oxidation resistance, is excellent in stability, can be widely applied to various novel energy conversion and storage devices such as fuel cells, electrolyzed waterand metal-air batteries, is expected to replace noble metal Pt base, Ru base and Ir base catalyst, and realizes commercial application.

Description

technical field [0001] The invention belongs to the technical field of energy materials and electrochemistry, and relates to a dual-functional electrocatalyst applied to catalyze oxygen reduction reaction and oxygen evolution reaction, in particular to a FeNi / N-C highly dispersed core-shell structure catalyst and a preparation method thereof. Background technique [0002] With the rapid development of society, people's use of fossil fuels is increasing day by day, which leads to the aggravation of energy depletion and environmental degradation. As a result, metal-air batteries, fuel cells, and electrolyzed water, which have the advantages of high energy density and environmental protection And other new energy storage and conversion devices have become the focus of global research and development. Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are key electrode reactions in various emerging energy conversion and storage devices, including fuel cells, ele...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/0086
Inventor 李光兰杨贝贝陈文雯袁丽芳徐晓存
Owner DALIAN UNIV OF TECH
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