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NiV2S4 electrocatalyst and preparation method thereof

An electrocatalyst and mixture technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve problems such as no electrocatalytic hydrogen production research, and achieve cheap synthetic raw materials, low production costs, and high controllability. Effect

Inactive Publication Date: 2019-01-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, NiV 2 S 4 Has not been used in electrocatalytic hydrogen production research

Method used

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  • NiV2S4 electrocatalyst and preparation method thereof
  • NiV2S4 electrocatalyst and preparation method thereof
  • NiV2S4 electrocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Put 200mg of thiocyanic acid, 66mg of nickel nitrate hexahydrate and 107mg of vanadium trichloride in a mortar for grinding, so that the raw materials in the mortar are evenly mixed, put the resulting mixture into a porcelain boat, and place the porcelain boat Place in a tube-type atmosphere furnace, and place two furnace plugs at each end of the tube.

[0021] Step 2: Inject inert gas into the tube, and then carry out 8 times of pumping and replenishing air, even if the air inside is exhausted, no gas will be replenished after the last pumping, and the air pressure in the tube is controlled to be -1~0MPa; when the air pressure is -1~0MPa Under normal circumstances, raise the temperature to 800°C at a rate of 10°C / min, and keep it warm for 3 hours; after the end of the heat preservation, open the air valve immediately, let the inert gas flow in at 700~800sccm, and discharge the sulfur vapor generated during the heat preservation process. Ensure that cooling is p...

Embodiment 2

[0024] Step 1: Put 400.8mg of thiocyanic acid, 290mg of nickel nitrate hexahydrate and 54mg of vanadium trichloride in a mortar for grinding, so that the raw materials in the mortar are evenly mixed, put the resulting mixture into a porcelain boat, and place the porcelain The boat is placed in a tube-type atmosphere furnace, and there are two furnace plugs at each end of the tube.

[0025] Step 2: Inject an inert gas into the tube, and then carry out 5 times of pumping to replenish the air, exhaust the air inside, and do not replenish the gas after the last pumping, and control the air pressure in the tube to -1~0MPa; when the air pressure is -1~0MPa Under normal circumstances, raise the temperature to 500°C at a rate of 10°C / min, and keep it warm for 3 hours; after the end of the heat preservation, open the air valve immediately, let the inert gas flow in at 700~800sccm, and discharge the sulfur vapor generated during the heat preservation process. Ensure that cooling is perf...

Embodiment 3

[0028] Step 1: Put 400.8mg of thiourea, 131mg of nickel nitrate hexahydrate and 118mg of vanadium acetylacetonate in a mortar for grinding, so that the raw materials in the mortar are evenly mixed, put the resulting mixture into a porcelain boat, and place the porcelain boat in the tube type atmosphere furnace, and two furnace plugs on each side of the tube ends.

[0029] Step 2: Inject inert gas into the tube, and then carry out 8 times of pumping and replenishing air, even if the air inside is exhausted, no gas will be replenished after the last pumping, and the air pressure in the tube is controlled to be -1~0MPa; when the air pressure is -1~0MPa Under normal circumstances, raise the temperature to 700°C at a rate of 5°C / min, and keep it warm for 3 hours; after the end of the heat preservation, immediately open the air valve, and let the inert gas flow in at 500~700sccm to discharge the sulfur vapor generated during the heat preservation process. Ensure that cooling is perf...

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Abstract

The invention discloses a preparation method of a NiV2S4 nanoparticle electrocatalyst and an application of the NiV2S4 nanoparticle electrocatalyst as electrocatalytic cracking hydrogen aquatic production catalysts, and belongs to the field of catalyst synthesis technology and application. Sulfur-rich organic matter is used as a sulfur source; metal vanadium salt is used as a vanadium source; metal nickel salt is used as a nickel source; and the hydrogen production eletrocatalyst with NiV2S4 nanoparticles, uniform chemical composition and electrocatalytic activity in the whole PH electrolyte is obtained through one-step calcination after the constituents are uniformly mixed through a mechanical method. The preparation method has the advantages that the synthetic raw material is cheap, thesynthesis method is simple, the production cost is low, and the controllability is high. NiV2S4 is a novel aquatic cracking hydrogen production electrocatalyst that exhibits hydrogen production catalytic activity to a certain extent within the full pH range (0-14).

Description

technical field [0001] The invention belongs to the technical field of hydrolysis electrocatalysts, in particular to a NiV 2 S 4 Electrocatalyst and method for its preparation. Background technique [0002] Due to the shortage of energy and severe environmental pollution in today's society, hydrogen, as a storable, pollution-free and renewable high-quality energy carrier, has been extensively researched and developed. Hydrogen production by electrolysis of water is a large-scale hydrogen production method with simple operation and mature technology; however, the biggest problem at present is the high power consumption and the price of the most effective catalysts such as Pt, Pd and their alloys required for hydrogen production However, some non-noble metal catalysts including nickel or nickel-based materials, metal sulfides, selenides, carbides, nitrides, phosphides, etc. have been developed. Therefore, the development of inexpensive, abundant, and highly active catalysts...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06B01J27/043B01J35/02C01G53/11B82Y40/00
CPCC25B1/04B82Y40/00C01G53/11B01J27/043C01P2004/64C25B11/075B01J35/40Y02E60/36
Inventor 曹丽云王琳琳冯亮亮黄剑锋巩颖波王潇冯李杜盈盈
Owner SHAANXI UNIV OF SCI & TECH
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