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A kind of in-situ preparation method of ni/nio composite material and its application

A composite material, in-situ preparation technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of low catalytic activity and stability of catalysts, weak interaction between carriers and metals, It is difficult to separate from the impregnating liquid, etc., to achieve the effect of ultra-high catalytic activity and selectivity, tight binding, and not easy to deactivate.

Active Publication Date: 2020-08-04
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the currently most widely used method for producing supported Ni metal catalysts, the metal particle size is large, the dispersion is poor, the interaction force between the carrier and the metal is weak, and the metal content is not easy to control, and the catalyst is difficult to separate from the impregnating solution. The catalytic activity and stability of the catalyst obtained are generally low technical problems. The present invention provides a kind of metal content that is easy to control, the metal dispersion is high, and there is a strong interaction between the metal and the support, thereby increasing the number of active sites. As well as promoting the transfer of electrons in the reaction, the in-situ preparation method of Ni / NiO composite material with higher catalytic activity and stability, and the Ni / NiO composite material prepared by using it in the hydrogenation of 2(5H)-furanone to γ - Application in Butyrolactone Reaction

Method used

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  • A kind of in-situ preparation method of ni/nio composite material and its application
  • A kind of in-situ preparation method of ni/nio composite material and its application
  • A kind of in-situ preparation method of ni/nio composite material and its application

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preparation example Construction

[0034] This embodiment proposes a method for preparing a Ni / NiO composite material, including the following steps:

[0035] (1) The nickel source is fully dissolved in an inorganic solvent to form a solution A;

[0036] (2) Add a strong reducing agent to the solution A to form a mixed solution;

[0037] (3) subjecting the mixed solution obtained in step (2) to a hydrothermal reaction to obtain a solid-liquid mixture, which is separated, washed, and dried to obtain the solid-liquid mixture;

[0038] (4) performing a high-temperature thermal decomposition reaction on the precursor I in step (3) to obtain the precursor II;

[0039] (5) Reducing the precursor II in step (4) under a reducing gas atmosphere to obtain a Ni / NiO composite material.

[0040] In this embodiment, the molar concentration ratio of the nickel source and the strong reducing agent is 0.1˜2.5:3. Preferably, the molar concentration ratio of the nickel source and the strong reducing agent is 1:3.

[0041] In ...

Embodiment 1

[0054] Embodiment 1 proposes a kind of in-situ preparation method of Ni / NiO composite material, comprises the following steps:

[0055] (1) Weigh 0.582g of nickel nitrate hexahydrate and add it to 40mL of deionized water, and stir at a constant speed until the nickel nitrate hexahydrate is fully dissolved to form solution A;

[0056] (2) Take again 0.226g of sodium borohydride and add it to the solution A in step (1), and stir evenly for 5min to form a mixed solution;

[0057] (3) Transfer the mixed solution to a 50mL autoclave with polytetrafluoroethylene as the inner liner, and the filling amount of the inner liner is 80%, then put the autoclave into the oven, and naturally heat up to 120°C Afterwards, heat preservation for 1 hour, and after natural cooling to room temperature, the autoclave was taken out to obtain a solid-liquid mixture;

[0058] (4) The solid-liquid mixture was washed three times successively with water and absolute ethanol, and after each washing, use a ...

Embodiment 2

[0063] Embodiment 2 proposes a kind of in-situ preparation method of Ni / NiO composite material, comprises the steps:

[0064] (1) Weigh 0.582g of nickel nitrate hexahydrate and add it to 40mL of deionized water, and stir at a constant speed until the nickel nitrate hexahydrate is fully dissolved to form solution A;

[0065] (2) Take again 0.226g of sodium borohydride and add it to the solution A in step (1), and stir evenly for 5min to form a mixed solution;

[0066] (3) Transfer the mixed solution to a 50mL autoclave with polytetrafluoroethylene as the inner liner, and the filling amount of the inner liner is 80%, then put the autoclave into the oven, and naturally heat up to 180°C After keeping it warm for 2 hours, after cooling down to room temperature naturally, the autoclave was taken out to obtain a solid-liquid mixture;

[0067] (4) The solid-liquid mixture was washed three times successively with water and absolute ethanol, and after each washing, use a centrifuge at ...

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Abstract

The invention belongs to the technical field of new materials and provides an in-situ preparation method and application of Ni / NiO composite materials. The preparation method includes the following steps: (1) fully dissolve the nickel source in the inorganic solvent to form solution A; (2) add a strong reducing agent to the solution A to form a mixed solution; (3) combine the solution obtained in step (2) The mixed liquid is subjected to a hydrothermal reaction to obtain a solid-liquid mixture, which is separated, washed, and dried to obtain the precursor I; (4) the precursor I in step (3) is subjected to a high-density thermal decomposition reaction to obtain Precursor II; (5) The precursor II in step (4) is subjected to a reduction reaction in a reducing gas atmosphere to obtain a Ni / NiO composite material. This method is easy to control the metal content, has high metal dispersion and strong interaction between the metal and the carrier, thereby increasing the number of active sites and promoting the transfer of electrons in the reaction, and obtaining Ni / NiO with higher activity and stability. composite materials.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to an in-situ preparation method and application of a Ni / NiO composite material. Background technique [0002] In recent years, the rapid development of industry has led to the excessive consumption of fossil energy, and the resulting energy crisis has become increasingly serious. However, in order to alleviate this energy crisis, in addition to developing renewable energy, it is equally important to explore sustainable carbon sources. In this regard, biomass is the only candidate for a sustainable carbon source, since it stores most of the current carbon and its consumption does not alter the carbon balance of today's ecosystems. Therefore, it is particularly important to upgrade many derivatives of biomass to produce essential products for human life and industrial production with high use value. [0003] 2(5H)-furanone, a common biomass derivative, has only on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C07D307/33
CPCB01J23/755C07D307/33
Inventor 秦高梧曹凤王雨楠李松周军
Owner NORTHEASTERN UNIV LIAONING
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