Preparation method of perovskite catalyst and product and application thereof

A catalyst and perovskite technology, applied in the fields of catalysis and material chemistry, can solve the problems of complicated preparation process and lengthy steps, and achieve the effects of high atom utilization, easy acquisition, and simple and efficient preparation method.

Inactive Publication Date: 2018-12-28
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the whole preparation process is complicated, from co-precipitation to template, the steps are lengthy

Method used

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  • Preparation method of perovskite catalyst and product and application thereof
  • Preparation method of perovskite catalyst and product and application thereof
  • Preparation method of perovskite catalyst and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh the molar ratio as Fe(NO 3 ) 3 9H 2 O:La(NO 3 ) 3 ·6H 2 O:C 4 h 4 CoO 4 4H 2 O:PdCl 2 Citric acid monohydrate = 0.1 : 1 : 0.9 : 1 / 50 : 3, where La(NO 3 ) 3 is 0.01 mol. respectively dissolved in 20ml deionized water, in which PdCl 2 Add 0.2ml of hydrochloric acid dropwise and dissolve in 20ml of deionized water at 50°C. First, fully mix the cobalt metal precursor solution, the iron metal precursor solution and the palladium metal precursor solution, then add the lanthanum metal precursor solution and mix well, and finally add the citric acid solution and mix well. Then put the mixture solution into an oven for drying, the temperature of the oven is 100° C., and bake for 3 hours. Then the mixture was kept warm in a muffle furnace, the heat preservation atmosphere was air, and the heating rate was 5° C. / min. After heat preservation, naturally cool to room temperature to obtain perovskite LaFe 0.1 co 0.9 o 3 material, its XRD pattern is shown in fi...

Embodiment 2

[0033] Weigh the molar ratio as Fe(NO 3 ) 3 9H 2 O:La(NO 3 ) 3 ·6H 2 O:C 4 h 4 CoO 4 4H 2 O:PdCl 2 Citric acid monohydrate = 0.4 : 1 : 0.6 : 1 / 50 : 3, where La(NO 3 ) 3 is 0.01 mol. respectively dissolved in 20ml deionized water, in which PdCl 2 Add 0.2ml of hydrochloric acid dropwise and dissolve in 20ml of deionized water at 50°C. First, fully mix the cobalt metal precursor solution, the iron metal precursor solution and the palladium metal precursor solution, then add the lanthanum metal precursor solution and mix well, and finally add the citric acid solution and mix well. Then put the mixture solution into an oven for drying, the temperature of the oven is 100° C., and bake for 3 hours. Then the mixture was kept warm in a muffle furnace, the heat preservation atmosphere was air, and the heating rate was 5° C. / min. After heat preservation, naturally cool to room temperature to obtain perovskite LaFe 0.4 co 0.6 o 3 Material, LaFe 0.4 co 0.6 o 3 XRD diag...

Embodiment 3

[0036] Weigh the molar ratio as Fe(NO 3 ) 3 9H 2 O:La(NO 3 ) 3 ·6H 2 O:C 4 h 4 CoO 4 4H 2 O:PdCl 2 Citric acid monohydrate = 0.9 : 1 : 0.1 : 1 / 50 : 3, where La(NO 3 ) 3 is 0.01 mol. respectively dissolved in 20ml deionized water, in which PdCl 2 Add 0.2ml of hydrochloric acid dropwise and dissolve in 20ml of deionized water at 50°C. First, fully mix the cobalt metal precursor solution, the iron metal precursor solution and the palladium metal precursor solution, then add the lanthanum metal precursor solution and mix well, and finally add the citric acid solution and mix well. Then put the mixture solution into an oven for drying, the temperature of the oven is 100° C., and bake for 3 hours. Then the mixture was kept warm in a muffle furnace, the heat preservation atmosphere was air, and the heating rate was 5° C. / min. After heat preservation, naturally cool to room temperature to obtain perovskite LaFe 0.9 co 0.1 o 3 Material. The material is prepared as a ...

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Abstract

The invention provides a preparation method of a perovskite catalyst and a product and an application thereof. The perovskite catalyst has a general formula LaFexCo1-xO3, wherein 0<x<1. The preparation comprises an iron metal precursor solution, a lanthanum metal precursor solution, a cobalt metal precursor solution, a palladium metal precursor solution and a citric acid solution. The method includes mixing the iron metal precursor solution, the lanthanum metal precursor solution, the cobalt metal precursor solution and the palladium metal precursor solution uniformly in a certain molar ratioand a certain mixing order; adding the citric acid solution to the uniformly mixed precursor solution; placing the mixture solution in an oven for drying to concentrate the mixture solution; keeping the temperature of the concentrated mixture at 700 DEG C for 4 hours in a muffle furnace to obtain the perovskite catalyst. The preparation method is simple and efficient, easy to operate and high in atomic utilization rate. The catalyst is applied to electrocatalysis to verify the catalytic effect.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a preparation method of a perovskite catalyst and its product and application, which are applied in the field of catalysis. Background technique [0002] With the continuous development of society, energy issues have become one of the hot topics. Therefore, today's society has a high demand for high-efficiency, non-polluting new energy sources, and energy transformation is also a severe and important issue facing mankind. Catalytic materials play a very important role in people's exploration of energy transformation. Taking methanol catalysis as an example, the current main research on methanol catalyst materials focuses on the catalysis of noble metals, but because of the cost of noble metals, poisoning and other difficult problems, impedes its commercialization. Therefore, the research on the catalysis of methanol and other fuels by non-noble metals has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C25B3/00C25B11/06
CPCB01J23/002B01J23/83B01J35/0033B01J2523/00C25B3/00C25B11/04B01J2523/3706B01J2523/842B01J2523/845
Inventor 何丹农张道明解启飞张芳卢玉英吴晓燕金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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