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Carbon-based intermetallic compound nano material as well as preparation method and application thereof

An intermetallic compound and nanomaterial technology, applied in the field of nanomaterials, can solve problems such as worrying application prospects, complex preparation processes, and expensive raw materials.

Pending Publication Date: 2021-08-20
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods have achieved effective control of the size of intermetallic compounds, expensive raw materials, complicated preparation processe

Method used

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  • Carbon-based intermetallic compound nano material as well as preparation method and application thereof
  • Carbon-based intermetallic compound nano material as well as preparation method and application thereof
  • Carbon-based intermetallic compound nano material as well as preparation method and application thereof

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preparation example Construction

[0039] The application also provides a method for preparing carbon-based intermetallic compound nanomaterials, comprising the following steps:

[0040]A) mixing porous carbon Black Pearls 2000, a metal salt precursor and a solvent to obtain an initial mixture; the metal salt precursor is a Rh base salt and other metal salts;

[0041] B) heat-treating the initial mixture under a reducing atmosphere to obtain carbon-based intermetallic compound nanomaterials.

[0042] According to the above preparation method, the preparation method of the carbon-based intermetallic compound nanomaterial provided by the present application can be prepared only by dipping and heat treatment. This method is universally applicable to various metals, and the process operation is simple and easy.

[0043] Specifically, in the process of preparing carbon-based intermetallic compound nanomaterials, the applicant first mixes porous carbon BlackPearls 2000, metal salt precursor and solvent, and obtains t...

Embodiment 1

[0053] a. Mix 50mg of porous carbon material with appropriate amount of C 15 h 21 o 6 Rh and TiCl 4 (Guaranteed Rh / Ti atomic ratio = 3 / 1, and the total loading of Rh and Ti is 15wt%) Place in a 100ml round bottom flask, add solvent ethanol, stir for 6-10h, and after rotary evaporation and drying, a uniformly mixed precursor is obtained body;

[0054] b. Put the precursor into the tube furnace, feed the argon-hydrogen mixture into the tube furnace as a protective gas, raise the temperature of the tube furnace to 1000 °C at a rate of 5 °C / min, and keep it for 2 hours; At room temperature, keep the normal pressure in the tube furnace to get Rh 3 Ti intermetallic compound nanocatalyst.

[0055] figure 1 Rh provided for Example 1 of the present invention 3 Rh in Ti intermetallic nanocatalysts 3 XRD, HAADF-STEM and particle size distribution photos of Ti intermetallic phase;

[0056] It can be seen from XRD that the material matches Rh 3 Ti standard PDF card; HAADF-STEM sh...

Embodiment 2

[0058] a. Mix 50 mg of porous carbon material with appropriate amount of RhCl 3 ·3H 2 O and VCl 3 (Guaranteed Rh / V atomic ratio = 3 / 1, and the total loading of Rh and V is 15wt%) Place in a 100ml round bottom flask, add solvent water, stir for 6-10h, and after rotary evaporation and drying, a uniformly mixed precursor is obtained body;

[0059] b. Put the precursor into the tube furnace, feed the argon-hydrogen mixture into the tube furnace as a protective gas, raise the temperature of the tube furnace to 1000 °C at a rate of 5 °C / min, and keep it for 2 hours; At room temperature, keep the normal pressure in the tube furnace to get Rh 3 V intermetallic nanocatalysts.

[0060] figure 2 Rh provided for embodiment 2 of the present invention 3 Rh in intermetallic nanocatalysts 3 XRD, HAADF-STEM and particle size distribution photos of V intermetallic phase;

[0061] It can be seen from XRD that the material matches Rh 3 V standard PDF card; HAADF-STEM shows that the aver...

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Abstract

The invention provides a carbon-based intermetallic compound nano material. The carbon-based intermetallic compound nano material comprises porous carbon BlackPearls 2000 and an intermetallic compound loaded on the surface of the porous carbon, the intermetallic compound is an Rh-based intermetallic compound. The invention further provides a preparation method and application of the carbon-based intermetallic compound nanometer material. According to the carbon-based intermetallic compound nano material as well as the preparation method and application thereof of the present invention, the high-surface-area porous carbon Black Pearls 2000 are adopted, so that the metal particle spacing is increased, and sintering is inhibited, the size-controllable carbon-based intermetallic compound nanometer material is synthesized, the size of the intermetallic compound in the catalyst is less than 5 nm, and the utilization rate is high; and the method has the advantages of universality, simplicity in operation, low cost and easiness in industrial production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a carbon-based intermetallic compound nanomaterial, its preparation method and its application. Background technique [0002] Intermetallic compounds are structurally ordered alloys. In intermetallic compounds, metal atoms are bound by strong d-orbital interactions and are ordered anisotropically in specific crystallographic directions. Based on an ordered arrangement of atoms, intermetallic compounds maximize the number of ideal active sites. Compared with disordered alloys, intermetallics exhibit enhanced geometric effects, electronic effects, and dual-functional mechanisms in catalysis. In addition, the special surface structure of intermetallic compounds determines the unprecedented steric effect, exhibiting unique properties. Therefore, intermetallic compounds are a promising catalyst material. [0003] At present, there are usually two methods for the preparation ...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J23/62B01J23/644B01J23/648B01J23/89B01J35/10
CPCB01J23/464B01J23/6482B01J23/8906B01J23/62B01J23/626B01J23/6445B01J35/10
Inventor 梁海伟左路杰
Owner UNIV OF SCI & TECH OF CHINA
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