Carbon tube supported ultra-small VN hydrogen production electrocatalyst, synthesis method and application

A technology of electrocatalyst and synthesis method, applied in the direction of chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problems of complex preparation process and high manufacturing cost, and achieve good electrochemical performance, improved efficiency, The unique effect of the structure

Pending Publication Date: 2020-01-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The preparation process for preparing vanadium nitride in the prior art is complicated, the manufacturing cost is high, and the electrochemical performance of the prepared vanadium nitride needs to be further improved

Method used

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  • Carbon tube supported ultra-small VN hydrogen production electrocatalyst, synthesis method and application
  • Carbon tube supported ultra-small VN hydrogen production electrocatalyst, synthesis method and application
  • Carbon tube supported ultra-small VN hydrogen production electrocatalyst, synthesis method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The synthesis method of the carbon tube-loaded cobalt-doped ultra-small VN hydrogen-producing electrocatalyst of this embodiment comprises the following steps:

[0027] S1. Put 1500mg of dicyandiamide, 100mg of cobalt chloride hexahydrate and 0.025g of ammonium metavanadate in a mortar and grind for 20 minutes to mix the raw materials evenly. Put the obtained mixture into a porcelain boat and place the porcelain boat on In a tube-type atmosphere furnace, two furnace plugs are placed at each end of the quartz tube.

[0028] S2. Introduce the inert gas argon into the tube, and then carry out pumping and gas replenishment three times each. The heating rate was raised to 500°C at a rate of 10°C / min, and kept for 2 hours, and then raised to 900°C at a rate of 5°C / min, and kept for 2 hours.

[0029] S3. When the sample is cooled to room temperature, take out the sample and grind it for 20min, then use 1mol / L H 2 SO 4 Pickling for 12h. After acid washing, the sample was wa...

Embodiment 2

[0031] The synthesis method of the carbon tube-loaded cobalt-doped ultra-small VN hydrogen-producing electrocatalyst of this embodiment comprises the following steps:

[0032] S1. Put 1500mg of melamine, 0.75mg of cobalt chloride hexahydrate and 0.025g of ammonium metavanadate in a mortar and grind for 20 minutes to mix the raw materials evenly. In a type atmosphere furnace, two furnace plugs are placed at each end of the quartz tube.

[0033] S2. Introduce the inert gas argon into the tube, and then carry out pumping and gas replenishment three times each. The heating rate was raised to 500°C at a rate of 10°C / min, and kept for 2 hours, and then raised to 800°C at a rate of 5°C / min, and kept for 2 hours.

[0034] S3. When the sample is cooled to room temperature, the sample is taken out and ground for 20 minutes, and then acid-washed with 1 mol / L H2SO4 for 12 hours. After acid washing, the sample was washed and centrifuged three times alternately with ultrapure water and ab...

Embodiment 3

[0036] The synthesis method of the carbon tube-loaded cobalt-doped ultra-small VN hydrogen-producing electrocatalyst of this embodiment comprises the following steps:

[0037] S1. Put 1500mg of dicyandiamide, 100mg of cobalt chloride hexahydrate and 0.05g of ammonium metavanadate in a mortar and grind for 20 minutes to mix the raw materials evenly. Put the obtained mixture into a porcelain boat and place the porcelain boat on In a tube-type atmosphere furnace, two furnace plugs are placed at each end of the quartz tube.

[0038] S2. Introduce the inert gas argon into the tube, and then carry out pumping and gas replenishment three times each. The heating rate was raised to 500°C at a rate of 10°C / min, and kept for 2 hours, and then raised to 900°C at a rate of 5°C / min, and kept for 2 hours.

[0039] S3. When the sample is cooled to room temperature, take out the sample and grind it for 20min, then use 1mol / L H 2 SO 4 Pickling for 12h. After acid washing, the sample was was...

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Abstract

The invention discloses a carbon tube supported ultra-small VN hydrogen production electrocatalyst, a synthesis method and application, and belongs to the technical field of electrocatalyst synthesis.The preparation method comprises the following steps: mixing and grinding a nitrogen-containing carbon source, cobalt chloride hexahydrate and ammonium metavanadate to obtain a reactant raw material;reacting the reactant raw materials in an argon atmosphere; carrying out heat preservation for 2 to 5h at 600 to 900 DEG C; washing, drying and grinding a powder obtained through cooling to obtain carbon tube supported vanadium nitride; and preparing the carbon nanotube supported ultra-small VN particles by adopting a one-step method. The synthesis method is simple, the structure is unique, and the conductivity of the catalyst is improved due to doping of elemental cobalt in the synthesized catalyst, so that the catalyst has relatively good electrochemical performance, is low in synthesis cost and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of electrocatalyst synthesis, in particular to a carbon tube-loaded ultra-small VN electrocatalyst for hydrogen production, a synthesis method and an application. Background technique [0002] In recent years, due to the non-renewability of fossil energy, the direction of new energy has always been a hot topic. Among renewable energy, hydrogen energy occupies a large position in new energy due to its unique advantages. The method of industrial hydrogen production mainly There are methane reforming to produce hydrogen and water electrolysis to produce hydrogen. The world is rich in water resources, which establishes the advantages of hydrogen production by electrolysis of water. The choice of electrode material determines the efficiency of water electrolysis. At present, the most efficient electrode material is noble metal. However, due to the high price of noble metal, it is difficult to popularize it in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08C25B1/04C25B11/06
CPCB01J27/24B01J37/082B01J35/0033B01J35/0013B01J37/0036C25B1/04C25B11/091Y02E60/36
Inventor 冯亮亮冯李黄剑锋曹丽云杜盈盈李东明
Owner SHAANXI UNIV OF SCI & TECH
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