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Preparation method of vanadium nitride electrocatalyst and product

An electrocatalyst, vanadium nitride technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc., can solve the problems of complex process, large size of vanadium nitride powder, and few applications in the field of electrocatalysis , to achieve the effect of simple process, short time consumption and uniform shape

Inactive Publication Date: 2017-11-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method and product of vanadium nitride electrocatalyst, so as to overcome the defects of complex process, large size of vanadium nitride powder and few applications in the field of electrocatalysis in the prior art

Method used

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  • Preparation method of vanadium nitride electrocatalyst and product
  • Preparation method of vanadium nitride electrocatalyst and product
  • Preparation method of vanadium nitride electrocatalyst and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Weigh 1.5g urea, 0.3g ammonium metavanadate, 0.3g cobalt nitrate hexahydrate, fully mix and grind for 20min;

[0024] Step 2: Put the raw materials obtained in Step 1 into a porcelain boat and react in a tube furnace with argon as the atmosphere. The heating rate is 5°C / min, the holding temperature is 700°C, and the holding time is 2h. After cooling, the obtained Powder with 0.5M H 2 SO 4 The solution was soaked for 10 hours (to remove impurities such as cobalt oxide), and the lower precipitate was washed with water and alcohol alternately six times, dried in an oven at 60°C for 6 hours, and ground in a mortar for 20 minutes to obtain a vanadium nitride electrocatalyst.

[0025] figure 1 It is the XRD spectrum of the nano-vanadium nitride prepared in this embodiment. It can be seen from the figure that the corresponding standard PDF card number of the sample is 78-1315, and the diffraction peak is sharp and high in intensity, indicating that the vanadium nitri...

Embodiment 2

[0027] Step 1: Weigh 1.5g urea, 0.3g ammonium metavanadate, 0.3g cobalt nitrate hexahydrate, fully mix and grind for 40min;

[0028] Step 2: Put the raw materials obtained in Step 1 into a porcelain boat and react in a tube furnace with nitrogen as the atmosphere. The heating rate is 8°C / min, the holding temperature is 800°C, and the holding time is 5h. The powder obtained after cooling Body with 0.5M H 2 SO 4 The solution was soaked for 15 hours (to remove impurities such as cobalt oxide), and the lower precipitate was washed alternately with water and isopropanol six times, dried in an oven at 60°C for 8 hours, and ground in a mortar for 30 minutes to obtain a vanadium nitride electrocatalyst.

Embodiment 3

[0030] Step 1: Weigh 1.5g urea, 0.2g ammonium metavanadate, 0.3g cobalt nitrate hexahydrate, fully mix and grind for 20min;

[0031] Step 2: Put the raw materials obtained in Step 1 into a porcelain boat, and react in a tube furnace with argon as the atmosphere. The heating rate is 10°C / min, the holding temperature is 900°C, and the holding time is 5h. After cooling, the obtained Powder with 0.5M H 2 SO 4 The solution was soaked for 20 hours (to remove impurities such as cobalt oxide), and the lower precipitate was washed with water and methanol alternately six times, dried in an oven at 60°C for 6 hours, and ground in a mortar for 40 minutes to obtain a vanadium nitride electrocatalyst.

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Abstract

The invention discloses a preparation method of vanadium nitride electrocatalyst and a product. The preparation method comprises the following steps: 1) fully mixing urea, ammonium metavanadate and cobalt-nitrate hexahydrate according to a formula ratio, and fully grinding to obtain reactant raw materials; 2) carrying out high-temperature reaction on the reactant raw materials prepared in step 1) under atmosphere protection at a reaction temperature of 700-900DEG C for 2-5h, removing impurities from powder obtained after cooling through diluted acid, washing lower-layer precipitates, drying the precipitates, and fully grinding to obtain the vanadium nitride electrocatalyst. The vanadium nitride electrocatalyst prepared with the preparation method disclosed by the invention has the characteristics of simple technical process, short reaction period, uniform material chemical composition, even morphology size, high electrocatalytic activity and stability and the like.

Description

technical field [0001] The invention relates to the technical field of vanadium nitride nano powder preparation, in particular to a preparation method and product of vanadium nitride electrocatalyst. Background technique [0002] With the rapid growth of the global economy, energy problems and environmental pollution have deeply troubled human life. People urgently need to find clean and sustainable energy to solve these two problems. Hydrogen energy is a new generation of green and sustainable energy. High hopes. Water splitting technology is one of the effective ways to achieve sustainable production of hydrogen. The core issue of this technology is to develop efficient and cheap water splitting catalysts. At present, noble metal-based catalysts (such as Pt, Ru or Ir oxides) are the best catalysts for water splitting. However, the disadvantages of high price and low reserves greatly limit the wide application of this type of catalyst. Therefore, the development of High-e...

Claims

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Application Information

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IPC IPC(8): C01B21/06C25B1/04C25B11/06B82Y30/00B82Y40/00C01B3/04B01J27/24
CPCC25B1/04C25B11/04B82Y30/00B82Y40/00C01B3/042C01B21/0617B01J27/24C01B2203/0277C01B2203/1041C01P2004/03C01P2002/72C01P2004/64B01J35/33Y02E60/36
Inventor 曹丽云张宁冯亮亮黄剑锋杨丹刘倩倩李嘉胤赵亚娟
Owner SHAANXI UNIV OF SCI & TECH
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