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Supported alloy catalyst as well as preparation method and application thereof

An alloy catalyst and supported technology, which is applied in the field of supported alloy catalyst and its preparation, can solve the problems of by-product environmental pollution, low catalytic activity, and high preparation cost

Active Publication Date: 2020-10-30
福大紫金氢能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, as an aspect of the present invention, the technical problem to be solved by the present invention is to overcome the high cost of preparation of metal-nonmetal alloy catalysts in the prior art, or the defects such as easy occurrence of by-products leading to environmental pollution, thereby providing a cheap, Preparation method of metal-nonmetal alloy catalyst without side reaction
[0006] As another aspect of the present invention, the technical problem to be solved by the present invention is to overcome the low catalytic activity of the ammonia decomposition catalyst in the prior art, especially the defect that the low temperature catalytic activity of the ammonia decomposition catalyst needs to be further improved, thereby providing a loading Application of Type Alloy Catalyst in Ammonia Decomposition Reaction

Method used

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  • Supported alloy catalyst as well as preparation method and application thereof

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Embodiment 1

[0038] The present embodiment provides a supported alloy catalyst, and the preparation method of the catalyst is as follows:

[0039] 0.2463g of RuCl 3 and 10.1478 g of ZrOCl 2 ·8H 2 Add O to 100mL of water, mix evenly to obtain a mixed solution, add the above mixed solution and 100mL of potassium hydroxide solution with a substance concentration of 1.0mol / L dropwise into a water bath at 70°C, and control the pH of the solution to about 10.0 , and reacted for 2 hours to obtain a suspension; then 4.0 mL of 0.3 mol / L potassium borohydride solution was added dropwise to the above suspension, and the reaction was continued for 2 hours; the precipitate was washed by centrifugation, dried in vacuum at 60°C for 12 hours, and placed in an Ar atmosphere of 550°C Roasting for 2h, wherein, the heating rate of the calcination step is 1.0°C / min, that is, Ru-B / ZrO 2 Catalyst, wherein, Ru load 3.0wt%.

Embodiment 2

[0041] The present embodiment provides a supported alloy catalyst, and the preparation method of the catalyst is as follows:

[0042] 1.4946g of Ni(NO 3 ) 2 and 8.8896g of Ce(NO 3 ) 3 ·6H 2 O was added to 100mL of water, mixed evenly to obtain a mixed solution, and the above mixed solution and 100mL of sodium carbonate solution with a substance concentration of 2.0mol / L were added dropwise into a water bath at a temperature of 80°C, and the pH value of the control system was about 10.5 , reacted for 2h to obtain a suspension; then, 16.5mL of 0.5mol / L NaH 2 PO 2 The solution was added dropwise to the above suspension, and the reaction was continued for 2 hours; the precipitate was washed by centrifugation, dried in vacuum at 60°C for 12 hours, and calcined at 550°C in Ar atmosphere for 2 hours, wherein the heating rate of the calcining step was 1.0°C / min to obtain Ni-P / CeO 2 Catalyst, Ni loading 12.0wt%.

Embodiment 3

[0044] The present embodiment provides a supported alloy catalyst, and the preparation method of the catalyst is as follows:

[0045] 0.2466g of RuCl 3 and 10.1475 g of ZrOCl 2 ·8H2 Add O to 100mL of water, mix evenly to obtain a mixed solution, add the above mixed solution and 100mL of potassium hydroxide solution with a substance concentration of 1.0mol / L dropwise into a water bath at 60°C, and control the pH value of the solution to about 10.0 , and reacted for 4 hours to obtain a suspension; then 4.0 mL of 0.3 mol / L potassium borohydride solution was added dropwise to the above suspension, and the reaction was continued for 4 hours; the precipitate was washed by centrifugation, dried in vacuum at 60°C for 12 hours, and placed in an Ar atmosphere of 550°C Roasting for 2h, wherein, the heating rate of the calcination step is 1.0°C / min, that is, Ru-B / ZrO 2 Catalyst, wherein, Ru load 3.0wt%.

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Abstract

The invention belongs to the technical field of catalytic materials, and particularly relates to a supported alloy catalyst and a preparation method and application thereof. The method comprises the following steps of: mixing a mixed solution of an active metal salt and a carrier metal salt with an alkaline solution, carrying out a first reaction, and controlling the pH value of the system to 9.0-11.0 to obtain a turbid liquid; adding a phosphorus source or a boron source into the turbid liquid, carrying out a second reaction, and carrying out separation and vacuum drying on a reaction productto obtain an amorphous catalyst precursor; and roasting the obtained amorphous catalyst precursor in an inert atmosphere to obtain the supported alloy catalyst. According to the method, the supportedalloy catalyst having a specific structure and taking metal phosphide or boride as an active component is prepared by using an amorphous alloy material as a precursor, and due to the fact that nonmetal boron or phosphorus generates an electronic effect on metal, the electronic characteristic and the surface property of the supported alloy catalyst are changed, and then the ammonia decomposition performance of the catalyst is improved.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a supported alloy catalyst and its preparation method and application. Background technique [0002] Ammonia is not only an important inorganic chemical product, but also has unique advantages as a hydrogen carrier. Ammonia is easy to liquefy, has a pungent smell, is non-flammable and non-toxic at low concentrations, has high hydrogen storage density, mature production, storage and transportation technology, and has no carbon emissions in the hydrogen production process. It is an efficient, clean and safe hydrogen storage carrier . In order to achieve an economical and efficient hydrogen storage process, it is particularly important to develop catalysts that can efficiently catalyze the ammonia decomposition reaction. [0003] Because Ni-based catalyst has high ammonia decomposition activity and low price, it is currently an ammonia decomposition catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/83B01J27/185B01J37/08C01B3/04
CPCB01J23/462B01J27/1853B01J27/1856B01J23/83B01J37/088C01B3/047Y02E60/36
Inventor 江莉龙罗宇陈崇启林立蔡国辉
Owner 福大紫金氢能科技股份有限公司
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