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Preparation method and application of carbon-coated vanadium sulfide electrocatalyst

An electrocatalyst, vanadium sulfide technology, applied in physical/chemical process catalysts, electrodes, electrolysis processes, etc., can solve the problem of no electrocatalytic hydrogen production research, and achieve the effects of cheap synthetic raw materials, improved electrical conductivity, and uniform chemical composition

Inactive Publication Date: 2019-05-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Currently, V 3 S 4 Has not been used in electrocatalytic hydrogen production research

Method used

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  • Preparation method and application of carbon-coated vanadium sulfide electrocatalyst
  • Preparation method and application of carbon-coated vanadium sulfide electrocatalyst
  • Preparation method and application of carbon-coated vanadium sulfide electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Put 400.8mg of thiocyanuric acid, 107mg of vanadium trichloride and 0.5g of dicyandiamide in a mortar for grinding, so that the raw materials in Langzhong are evenly mixed, put the resulting mixture into a porcelain boat, and place the porcelain boat In a tube-type atmosphere furnace, there are two furnace plugs at each end of the tube.

[0026] 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 10°C / min, and keep it warm for 3 hours; after the end of the heat preservation, open the air valve immediately, and let the inert gas flow in at 700~800sccm to discharge the sulfur vapor generated during the heat preservation process. keep cold

[0027] It was carried out...

Embodiment 2

[0030] Step 1: Put 400.8mg of thiocyanuric acid, 107mg of vanadium trichloride and 0.2g of dicyandiamide in a mortar for grinding, so that the raw materials in Langzhong are evenly mixed, put the resulting mixture into a porcelain boat, and place the porcelain boat In a tube-type atmosphere furnace, there are two furnace plugs at each end of the tube.

[0031] 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 700°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, and let the inert gas flow in at 400~700sccm to discharge the sulfur vapor generated during the heat preservation process. keep cold

[0032] It was carried out under argon flow...

Embodiment 3

[0035] Step 1: Put 400.8mg of thiocyanuric acid, 80mg of ammonium metavanadate and 0.5g of dicyandiamide in a mortar for grinding, so that the raw materials in Langzhong are evenly mixed, and the resulting mixture is put into a porcelain boat, and the porcelain boat Place in a tube-type atmosphere furnace with two furnace plugs on each side of the tube.

[0036] 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, open the air valve immediately, and let the inert gas flow in at 700~800sccm to discharge the sulfur vapor generated during the heat preservation process. keep cold

[0037] It was carried ou...

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Abstract

The invention discloses a preparation method of a carbon-coated vanadium sulfide electrocatalyst and an application thereof in an aspect of serving as an electro-catalysis cracking water hydrogen-generating catalyst, and belongs to the field of catalyst synthetic technologies and applications. Disulfide vanadium is used as a layered material, more and more focused by people in recent years. However, there is less report about V3S4, and an electro-catalysis aspect is not reported yet. The method is capable of using a sulfur-enriched organic matter as a sulfur source and a carbon source, and using metal vanadic salt as a vanadium source, after uniformly mixing through a mechanical method, acquiring carbon-coated vanadium sulfide nanoparticles through one-step calcining. The method is rapid and simple, and an acquired material is the hydrogen-generating catalyst which is uniform in chemical composition and has electrocatalytic activity in full PH electrolyte.

Description

technical field [0001] The invention belongs to the technical field of synthesis and application of catalysts, and specifically designs a preparation method of a carbon-coated vanadium sulfide material and its application as a hydrogen-producing catalyst for electrocatalytic cracking of water. 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, pho...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/00B01J35/02C25B1/04C25B11/06
Inventor 冯亮亮王琳琳曹丽云黄剑锋杜盈盈徐瑞
Owner SHAANXI UNIV OF SCI & TECH
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