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A multi-metal phosphide nanotube catalyst with uniform distribution of catalytic centers and its low-temperature preparation method

A technology with uniform distribution and catalytic centers, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems that the active center and catalyst phase are uniformly dispersed, and achieve the distribution of phosphide catalysts The effect of uniformity, obvious advantages, and uniform distribution of catalytic activity

Active Publication Date: 2020-02-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this solution still cannot solve the problem of uniform dispersion of active centers and catalyst phases.

Method used

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  • A multi-metal phosphide nanotube catalyst with uniform distribution of catalytic centers and its low-temperature preparation method
  • A multi-metal phosphide nanotube catalyst with uniform distribution of catalytic centers and its low-temperature preparation method
  • A multi-metal phosphide nanotube catalyst with uniform distribution of catalytic centers and its low-temperature preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A low-temperature preparation method of a polymetallic phosphide nanotube catalyst with uniform distribution of catalytic centers, the steps are as follows:

[0054] 1) Preparation of MOF-74 precursor: Weigh 0.5972 g of cobalt acetate tetrahydrate and 0.1495 g of nickel acetate tetrahydrate and dissolve them in 30 ml of deionized water to obtain solution a; weigh 0.5944 g of 2,5-dihydroxyterephthalic acid Dissolve in 30 ml of tetrahydrofuran to obtain solution b; mix solution a and solution b at a ratio of 1:1 by volume, stir thoroughly and transfer to a high-pressure reactor with a polytetrafluoroethylene liner, react at 110°C for 24 hours, and The product was centrifuged and washed three times with deionized water and ethanol to obtain the metal MOF-74 precursor.

[0055] 2) Weigh 0.5 g of the MOF-74 precursor in step 1), put it in a corundum porcelain boat, put the porcelain boat into a tube furnace, and heat it to 350°C in an air atmosphere at a heating rate of 1°C ...

Embodiment 2

[0062] A method for preparing polymetallic phosphide nanotube catalyst at low temperature, comprising steps as follows:

[0063] 1) Preparation of MOF-74 precursor: Weigh 0.6719 g of cobalt acetate tetrahydrate and 0.0747 g of nickel acetate tetrahydrate and dissolve them in 30 ml of deionized water to obtain solution a; weigh 0.5944 g of 2,5-dihydroxyterephthalic acid Dissolve in 30 ml of tetrahydrofuran to obtain solution b; mix solution a and solution b at a ratio of 1:1 by volume, stir thoroughly and transfer to a high-pressure reactor with a polytetrafluoroethylene liner, react at 110°C for 24 hours, and The product was centrifuged and washed three times with deionized water and ethanol to obtain multimetallic MOF-74 precursors with different metal ratios.

[0064] 2) Weigh 0.5 g of the MOF-74 precursor in 1) and place it in a corundum porcelain boat, put the porcelain boat into a tube furnace, and heat it to 350°C in an air atmosphere at a heating rate of 1°C per minute ...

Embodiment 3

[0067] A method for preparing polymetallic phosphide nanotube catalyst at low temperature, comprising steps as follows:

[0068]1) Preparation of MOF-74 precursor: Weigh 0.5972 g of cobalt acetate tetrahydrate and 0.1495 g of nickel acetate tetrahydrate and dissolve them in 30 ml of deionized water to obtain solution a; weigh 0.5944 g of 2,5-dihydroxyterephthalic acid Dissolve in 30 ml of tetrahydrofuran to obtain solution b; mix solution a and solution b at a ratio of 1:2 by volume, stir thoroughly and transfer to a high-pressure reactor with a polytetrafluoroethylene liner, react at 110°C for 48 hours, and The product was centrifuged and washed three times with deionized water and ethanol to obtain multimetallic MOF-74 precursors with different metal ratios.

[0069] 2) Weigh 0.5 g of the MOF-74 precursor in step 1), put it in a corundum porcelain boat, put the porcelain boat into a tube furnace, and heat it to 350°C in an air atmosphere at a heating rate of 1°C per minute f...

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Abstract

The invention relates to a multi-metal phosphide nanotube catalyst with uniformly distributed catalytic centers and a low-temperature preparation method. The multi-metal phosphide catalyst has a hollow nanotube structure and is a composite material supported by carbon and with uniformly distributed catalytic centers. This method uses multi-metal metal-organic framework materials as templates to obtain multi-metal phosphide catalysts with nanotube structures through a simple low-temperature phosphating reaction (200-350°C). The prepared multi-metallic phosphide nanotube catalyst maintains the morphology of the precursor well, has a large specific surface area and pore volume, has a multi-level pore distribution, and has a uniform and controllable metal doping ratio and phase. , which is conducive to electrochemical catalysis, hydrodesulfurization, selective hydrogenation and other hydrogenation reactions, and has broad application prospects.

Description

technical field [0001] The invention relates to a polymetallic phosphide nanotube catalyst with evenly distributed catalytic centers and a low-temperature preparation method, belonging to the technical field of catalysts. Background technique [0002] With the growth of global population and economic development, energy has been regarded as the most basic demand for the development of human society. However, non-renewable resources such as petroleum and coal are depleting day by day, and a series of environmental problems caused by the development and utilization of fossil fuels. It is imperative to seek a clean energy that is green and renewable and reduces pollutant emissions in the process of energy use. [0003] Hydrogen energy is recognized as a clean energy source and known as the most promising secondary energy source in the 21st century. It helps to solve energy crisis, global warming and environmental pollution. Its development and utilization have attracted worldwi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J21/18B01J37/08
CPCB01J21/18B01J27/1853B01J37/086B01J35/393
Inventor 赵学波闫理停代鹏程顾鑫曹磊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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