Atomic-scale auxiliary agent modified CuO composite mesocrystal catalyst and preparation method thereof

A technology of composite mesogens and catalysts, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of difficult product regulation, high reaction temperature and low yield. and other problems, to achieve the effect of reducing the reaction temperature, reducing the reaction temperature, and enhancing the adsorption and dissociation capacity

Active Publication Date: 2021-10-29
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the reaction system does not contain a catalytic system, the reaction temperature is high, the energy consumption is high, the yield is low, and the product is difficult to control
Therefore, if the selective regulation and synthesis of TCS and STC can be realized, while reducing the reaction temperature and energy consumption, it will be of great significance to the sustainable development of various industries such as photovoltaic industry, optical fiber industry and organic silicon industry, but it is also very important. challenge

Method used

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  • Atomic-scale auxiliary agent modified CuO composite mesocrystal catalyst and preparation method thereof
  • Atomic-scale auxiliary agent modified CuO composite mesocrystal catalyst and preparation method thereof
  • Atomic-scale auxiliary agent modified CuO composite mesocrystal catalyst and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a preparation method of a CuO composite mesogenic catalyst modified by an atomic-level auxiliary agent, which comprises:

[0037] a. Dissolve the Cu salt precursor and the metal salt precursor containing additives M1 or M1, M2, and add it to acetic acid, ethanol or acetone solution to obtain a mixed solution; wherein,

[0038] Preferably, if it is a single-atom additive, in the metal salt precursor containing the additive M1 and the Cu salt precursor, the molar ratio of M1 ions to Cu ions is 1:3000-6000, such as 1:3000, 1: 3500, 1:4000, 1:4500, 1:5000, 1:5500 or 1:6000, etc.; if it is a double monoatomic additive, the metal salt precursor containing additives M1, M2 and the Cu salt precursor In the body, the molar ratios of M1 and M2 ions to Cu ions are 1:6000 to 12000, such as 1:6000, 1:6500, 1:7000, 1:8000, 1:9000, 1:10000, 1:11000 or 1:12000, etc., preferably, the molar ratio of M2 ions to Cu ions is 1:7200-9600;

[0039] Prefera...

Embodiment 1

[0049] (1) Weigh 0.000076g SnCl 2 and 0.605000gCu(NO 3 ) 2 ·3H 2 O was placed in a beaker, then 70mL N,N dimethylformamide and 5mL H were added 2 0, after the sample is completely dissolved, add 0.600000g acetic acid dropwise, and continue to stir for 15min to obtain a mixed solution;

[0050] (2) The mixed solution was transferred to a stainless steel autoclave lined with 100 mL polytetrafluoroethylene, and reacted at 140° C. for 6 h. After cooling down to room temperature, the product was suction filtered, washed with water, and then dried overnight at 60°C;

[0051] (3) The obtained sample was calcined at 400° C. for 3 h in an oxygen atmosphere to obtain a CuO composite mesogenic catalyst modified with single-atom additive Sn.

[0052] The XRD pattern of the CuO composite mesogenic catalyst modified by the single-atom additive Sn prepared in this example is as follows figure 1 As shown, it was tested on the X′Pert PRO MPD multifunctional X-ray diffractometer produced ...

Embodiment 2

[0058] (1) Weigh 0.000114g SnCl 2 and 0.605000g Cu(NO 3 ) 2 ·3H 2 O was placed in a beaker, then 70mL N,N dimethylformamide and 5mL H were added 2 0, after the sample is completely dissolved, add 0.600000g acetic acid dropwise, and continue to stir for 15min to obtain a mixed solution;

[0059] (2) The mixed solution was transferred to a stainless steel autoclave lined with 100 mL polytetrafluoroethylene, and reacted at 140° C. for 6 h. After cooling down to room temperature, the product was suction filtered, washed with water, and then dried overnight at 60°C;

[0060] (3) The obtained sample was calcined at 400° C. for 3 h in an oxygen atmosphere to obtain a CuO composite mesogenic catalyst modified with single-atom additive Sn.

[0061] Using the same test method as in Example 1, it can be seen from the ICP test results that the composition of the catalyst prepared in this example is as follows: the mass proportion of CuO is 99.985%, and the mass proportion of Sn is 0....

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Abstract

The invention discloses an atomic-scale auxiliary agent modified CuO composite mesocrystal catalyst, which comprises a main catalyst CuO mesocrystal and a monatomic auxiliary agent M1 or double monatomic auxiliary agents M1 and M2, the M1 and the M2 both exist in a monatomic dispersion state, the M1 is selected from any one of Zn, Zr, Ti, Mn, Fe, Co, Ni, Sn, In, Ce, Ru, Pd, Au, Pt and Rh, and the M2 is selected from any one of Ni, Au, Pt and Pd. The atomic-scale additive modified CuO composite mesocrystal catalyst has excellent catalytic performance, is used for hydrosilylation with silicon powder and HCl as raw materials, can realize selective regulation and control synthesis of trichlorosilane and silicon tetrachloride, reduces the reaction temperature and energy consumption, and improves the product yield and the silicon powder conversion rate.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a CuO composite mesogen catalyst modified by an atomic-level auxiliary agent, and in particular, to a preparation method of the CuO composite mesogen catalyst modified by an atomic-level auxiliary agent. Background technique [0002] Cu-based oxide composite catalysts have been widely used in many industrial catalytic reactions due to their low price and good catalytic performance, such as methanol synthesis, furfural hydrogenation to furfuryl alcohol, methanol steam reforming, organosilicon monomer synthesis reaction, etc. At present, industrial Cu-based oxide composite catalysts are usually polycrystalline structures containing various promoters, and the main catalyst (Cu 2 O, CuO) and additives (including elemental or oxide nanoparticles of alkali metals Na, K, etc., and transition metals Mn, Fe, Ti, Zn, Ni, Zr, etc.). However, due to the complexity and diversity of the str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/825B01J23/835B01J23/89B01J35/00C01B33/107
CPCB01J23/835B01J35/0046B01J23/825B01J23/8966C01B33/10763
Inventor 纪永军陈晓丽纪建军张煜诸葛骏豪赵晨
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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