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Preparation method for carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material

A nano-composite material and supported technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as difficult simultaneous realization, achieve good application prospects, simple preparation method, small size Uniform and fine effect

Active Publication Date: 2019-09-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to realize the phosphating-carbonizing process simultaneously in a confined space

Method used

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  • Preparation method for carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material
  • Preparation method for carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material
  • Preparation method for carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material

Examples

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Embodiment 1

[0035] In this embodiment, a method for preparing a carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material comprises the following steps:

[0036] (1) Weigh 0.5g ammonium molybdate and 4g dicyandiamide so that the mass ratio of ammonium molybdate to dicyandiamide is 1:8, dissolve them in a beaker with 100mL distilled water, and place the beaker on a magnetic stirrer , heated and stirred, and a white mixed precipitate was obtained after the distilled water volatilized, and the white mixed precipitate was placed in a constant temperature drying oven for drying, and ground into a white powder;

[0037] (2) Weigh 2g of white powder and 0.75g of sodium hypophosphite so that the mass ratio of white powder and sodium hypophosphite is 8:3, and place the two in two porcelain boats respectively, and then place the two porcelain boats Placed in a tube furnace, the porcelain boat containing sodium hypophosphite is located on the upstream side of the in...

Embodiment 2

[0041] In this embodiment, a method for preparing a carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material comprises the following steps:

[0042] (1) Weigh 0.5g ammonium molybdate and 4g dicyandiamide so that the mass ratio of ammonium molybdate to dicyandiamide is 1:8, dissolve them in a beaker with 100mL distilled water, and place the beaker on a magnetic stirrer , heated and stirred, and a white mixed precipitate was obtained after the distilled water volatilized, and the white mixed precipitate was placed in a constant temperature drying oven for drying, and ground into a white powder;

[0043] (2) Weigh 2g of white powder and 0.25g of sodium hypophosphite so that the mass ratio of white powder and sodium hypophosphite is 8:1, and place the two in two porcelain boats respectively, and then place the two porcelain boats Placed in a tube furnace, the porcelain boat containing sodium hypophosphite is located on the upstream side of the in...

Embodiment 3

[0045] In this embodiment, a method for preparing a carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material comprises the following steps:

[0046] (1) Weigh 0.5g ammonium molybdate and 4g dicyandiamide so that the mass ratio of ammonium molybdate to dicyandiamide is 1:8, dissolve them in a beaker with 100mL distilled water, and place the beaker on a magnetic stirrer , heated and stirred, and a white mixed precipitate was obtained after the distilled water volatilized, and the white mixed precipitate was placed in a constant temperature drying oven for drying, and ground into a white powder;

[0047](2) Weigh 2g of white powder and 1.5g of sodium hypophosphite so that the mass ratio of white powder and sodium hypophosphite is 4:3, and place the two in two porcelain boats respectively, and then place the two porcelain boats Placed in a tube furnace, the porcelain boat containing sodium hypophosphite is located on the upstream side of the inta...

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Abstract

The invention discloses a preparation method for a carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material, belonging to the technical field of nanomaterial preparation. The preparation method comprises the following steps: (1) adding ammonium molybdate and dicyandiamide into water, carrying out heating and stirring to allow the ammonium molybdate to be completely hydrolyzed, and carrying out drying and grinding successively to obtain white powder; and (2) separately placing the white powder and sodium hypophosphite in sealed space, carrying out heat-preserved treatment in an inert atmosphere, and performing cooling to obtain the carbon-supported alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material. The preparation method of the invention is simple in process and short in synthesis cycle; by controlling the amount of a precursor, the ratio of the alpha phase molybdenum carbide to the molybdenum phosphide can be controlled; and prepared molybdenum carbide-molybdenum phosphide heterojunction nano-dots are uniform and small in size, which is beneficial for the exposure of catalytic active sites, so the composite material has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing a carbon-loaded alpha phase molybdenum carbide-molybdenum phosphide nanocomposite material. Background technique [0002] The energy problems brought about by the rapid economic development are becoming more and more serious, and it is imminent to find a new green energy. As a clean energy, hydrogen energy has broad application prospects. Hydrogen evolution by electrolysis of water is one of the most potential hydrogen production processes. Its hydrogen production efficiency depends on noble metal catalysts such as Pt. However, Pt reserves are limited and expensive, which is not conducive to the long-term development of hydrogen production technology. Catalysts are of great significance for the development of hydrogen energy. As a hydrogen evolution catalyst, molybdenum phosphide has the advantages of high activity and high st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22
CPCB01J27/22B01J35/33
Inventor 吴壮志王德志刘添滢
Owner CENT SOUTH UNIV
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