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Carbon-cobalt-molybdenum double-metal phosphide composite material and preparation method thereof

A composite material and bimetal technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as poor stability of metal phosphides

Active Publication Date: 2019-04-23
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently prepared metal phosphides are not stable in the hydrogen evolution process.

Method used

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  • Carbon-cobalt-molybdenum double-metal phosphide composite material and preparation method thereof
  • Carbon-cobalt-molybdenum double-metal phosphide composite material and preparation method thereof
  • Carbon-cobalt-molybdenum double-metal phosphide composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Weigh 0.996gCo(NO 3 ) 2 ·6H 2 O and 1.312g 2-methylimidazole were dissolved in 100ml methanol respectively, and stirred for 10 minutes. After stirring and dissolving, the 2-methylimidazole solution was quickly poured into Co(NO 3 ) 2 In the solution, continue to stir for 10 minutes, stop stirring and then age at room temperature for 24 hours, then centrifuge the product, wash it with methanol for 3 times, and finally dry it in vacuum at 60°C for 8 hours. Blue-purple, rhombic dodecahedron in shape.

[0029] (2) 120mg MoO 3 Put 40mg of Co-based organic compound in a quartz boat and put it into a tubular resistance furnace, raise the temperature from room temperature to the target temperature of 800°C at a rate of 5°C / min in an argon atmosphere, and keep it constant for 2h, pass through MoO 3 Heating sublimation introduces Mo element into the dodecahedral porous carbon composite material Co-C with cobalt metal element, and prepares MoO containing 2 、Mo 2 Co-Mo-C...

Embodiment 2

[0032] (1) Weigh 1g of Co(NO 3 ) 2 ·6H 2 O and 3g of 2-methylimidazole were respectively dissolved in 100ml of methanol and stirred for 10 minutes. After stirring and dissolving, the 2-methylimidazole solution was quickly poured into Co(NO 3 ) 2 In the solution, continue to stir for 20 minutes, stop stirring and then age at room temperature for 14 hours, then centrifuge the product, wash it with methanol for 3 times, and finally dry it in vacuum at 60°C for 12 hours. Blue-purple, rhombic dodecahedron in shape.

[0033] (2) 150mg MoO 3 Put 60mg of Co-based organic compound in a quartz boat and put it into a tubular resistance furnace, raise the temperature from room temperature to the target temperature of 750°C at a rate of 5°C / min in an argon atmosphere, and keep it constant for 4h, pass through MoO 3 Heating sublimation introduces Mo element into the dodecahedral porous carbon composite material Co-C with cobalt metal element, and prepares MoO containing 2 、Mo 2 Co-Mo-C...

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Abstract

The invention discloses a carbon-cobalt-molybdenum double-metal phosphide composite material and a preparation method thereof. The composite material is formed by a carbon skeleton with a dodecahedronstructure and MoP, CoP and CoMoP2 nano particles uniformly embedded in the carbon skeleton. The carbon skeleton with the dodecahedron structure is effectively kept, and the nano double-metal phosphide particles are uniformly embedded in a carbon substrate, so aggregation and falling of the nano particles can be prevented, stability of a catalyst is reinforced, high conductivity of the carbon substrate and the synergistic effect between the nano double-metal phosphide particles can also be developed, and catalytic activity of the phosphide is further reinforced. The carbon skeleton is capableof effectively improving the electrical conductivity of a whole catalyst material, thereby further improving catalytic performance thereof. The synergistic effect between various phases of the double-metal phosphide has a very important function to improve electrochemical catalytic performance. The nano double-metal phosphides are uniformly embedded in the carbon substrate, the aggregation and falling of the nano particles can be prevented, the stability of the catalyst is reinforced, and the composite material also has excellent electrochemical hydrogen evolution performance in an alkaline environment.

Description

technical field [0001] The invention relates to a carbon-cobalt-molybdenum double metal phosphide composite material Co-Mo-P-C and a preparation method thereof, as well as the application of the composite material in the technical field of electrocatalytic hydrogen production. Background technique [0002] Catalytic hydrogen production has the advantages of high efficiency, low energy consumption, and environmental friendliness, and is a promising hydrogen production technology. However, due to the serious problem of cathode polarization at present, the energy consumption of catalytic hydrogen production technology has been greatly increased, thereby increasing the cost of hydrogen production. Noble metals such as Pt and their alloys have the best electrocatalytic hydrogen evolution performance, but their high cost makes it difficult to apply them on a large scale. The development of high-performance and low-cost non-precious metal catalysts is of great significance to prom...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J37/08B01J37/28C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/22B01J37/08B01J37/086B01J37/28B01J35/33Y02E60/36
Inventor 石佳子许文才李东立付亚波廖瑞娟张新林张柳鑫陶俊旭李双双蒋袆
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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