Nickel-based methane catalyst as well as preparation method and application thereof

A nickel-based catalyst and nickel salt technology, applied in the field of electrochemistry, can solve the problems of easy sintering, poor thermal stability of nickel single atoms, deactivation, etc., achieve stable and reliable performance, avoid carbon deposition and deactivation, and improve activity and stability. Effect

Active Publication Date: 2021-03-12
山西鸿福源能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal stability of nickel single atoms is poor, and it is easy to sinter and deactivate; it is often necessary to add cerium oxide and other components to stabilize single atoms and improve catalyst stability.

Method used

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  • Nickel-based methane catalyst as well as preparation method and application thereof
  • Nickel-based methane catalyst as well as preparation method and application thereof
  • Nickel-based methane catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0026] The preparation technology of described nickel sheet specifically comprises the steps:

[0027] 1. Nickel foam pretreatment: Cut the nickel foam into the required shape, soak in hydrochloric acid aqueous solution with a mass concentration of 0.5% to 5.0% for 1min to 5min, and then wash with deionized water. Then, it is ultrasonicated for 10 min to 30 min in an ammonia solution with a mass concentration of 1.0% to 15.0%, and then cleaned with deionized water. After cleaning, dry at 50° C. to 100° C. for 2 hours to obtain a nickel foam substrate.

[0028] 2. Preparation of foamed nickel-supported nickel single atom nickel sheet by hydrothermal method: put 5mL~20mL of 0.01%~1.0% nickel nitrate aqueous solution into a 100mL beaker (any nickel salt soluble in ethanol can be used for this place), then add 1-10 mL of ethanol and 0.1-2 mL of oleylamine, and stir for 10-30 minutes to obtain a nickel nitrate ethanol-oleylamine solution. Transfer the nickel nitrate ethanol-oleyl...

Embodiment

[0033] 1. Foamed nickel pretreatment: Cut the foamed nickel into a cuboid of 1cm×4cm×0.5mm, soak it in a hydrochloric acid aqueous solution with a mass concentration of 2.0% for 5 minutes, wash it with deionized water, and then soak it in a 5.0% ammonia solution with a mass concentration Ultrasonic for 30 min, then washed with deionized water, and dried for 2 h at a temperature of 80° C. to obtain a nickel foam substrate.

[0034] 2. Preparation of foamed nickel-supported nickel single-atom electrode by hydrothermal method: Put 20mL of 0.5% nickel nitrate aqueous solution into a 100mL beaker, then add 10mL of ethanol and 1mL of oleylamine mixture, and stir for 30min. Then transfer to a 50mL polytetrafluoroethylene hydrothermal reaction kettle, put the nickel foam pretreated in step 1 vertically into the reaction kettle equipped with nickel nitrate ethanol-oleylamine solution, at a temperature of 120°C Reaction 10h. Then cool down to room temperature naturally, open the hydrot...

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Abstract

The invention belongs to the field of electrochemistry, and particularly relates to a nickel-based methane catalyst as well as a preparation method and application thereof. According to the specific technical scheme, foamed nickel is loaded and only loaded with monatomic nickel. The invention provides a novel nickel-based catalyst, which not only effectively avoids the problem that a nano-catalystis easy to have the problem of carbon deposition deactivation, but also avoids the problem that nickel single atoms are easy to be unstable and deactivated under the condition of not additionally using additives; and the obtained nickel-based catalyst is stable and reliable in performance and high in cycle efficiency. The nickel single atoms grow on the foamed nickel in situ and are tightly combined with the foamed nickel without adding an adhesive; and the foamed nickel and the monatomic nickel are coordinated, so that the problems of catalyst poisoning and agglomeration are avoided, activity and stability of thecatalyst are further improved, and the catalyst can be widely applied to the field of electrochemical catalysis.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a nickel-based methane catalyst and its preparation method and application. Background technique [0002] Methane sensor has always been an important research content in the field of modern industry and technology. The rapid development of various catalysts makes it possible to realize the rapid detection of methane at relatively low temperature or normal temperature and pressure. Among many catalysts, metal catalysts are still the mainstream of methane sensor applications. Compared with noble metal catalysts, nickel-based catalysts have the advantages of high reactivity, abundant reserves, and low price, and have the possibility of replacing noble metal catalysts. Therefore, it occupies an important position in the research of methane catalytic detection. However, the nickel-based catalysts or nickel nanoparticle catalysts in the existing research generally have th...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/00B01J37/10G01N27/48
CPCB01J23/755B01J37/10G01N27/48B01J35/391B01J35/33
Inventor 杨小明
Owner 山西鸿福源能源科技有限公司
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