A ruthenium-modified sulfur-doped graphene two-dimensional material and its preparation and application

A technology of sulfur-doped graphene and two-dimensional materials, applied in the field of two-dimensional materials, can solve the problems of poor stability, reduced catalytic efficiency of catalysts, complicated preparation methods of electrode materials, etc.

Active Publication Date: 2020-10-30
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, there are still many problems in electrocatalytic hydrogen evolution materials based on metal ruthenium. One is the stability and recyclability of the electrode, especially the poor stability in alkaline solution, which reduces the catalytic efficiency of the catalyst; The second is that the reported electrode materials still have a high overpotential, and the third is that the current preparation methods of electrode materials are relatively complicated.

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  • A ruthenium-modified sulfur-doped graphene two-dimensional material and its preparation and application
  • A ruthenium-modified sulfur-doped graphene two-dimensional material and its preparation and application
  • A ruthenium-modified sulfur-doped graphene two-dimensional material and its preparation and application

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Effect test

Embodiment 1

[0059] Weigh 5mg RuCl 3 ·6H 2 O and 20 mg of graphene oxide were added to 10 mL of deionized water, and the pH value of the solution was adjusted to 2 by sulfuric acid, and ultrasonically oscillated for 4 hours, so that the two substances were evenly dispersed in the solution. The solution was lyophilized to remove solvent. The resulting solid was heated at 5 °C min under nitrogen atmosphere -1 The heating rate was added to 700°C, and baked for 2 hours. After cooling to room temperature, soak it with 0.1mol / L hydrochloric acid for 5 hours. Finally, the solid was washed with water until neutral, and dried in vacuum to obtain a sulfur-doped graphene two-dimensional material decorated with ruthenium.

Embodiment 2

[0061] Weigh 2.5mg RuCl 3 ·6H 2 O and 20 mg of graphene oxide were added to 10 mL of deionized water, and the pH value of the solution was adjusted to 3 by sulfuric acid, and ultrasonically oscillated for 3 hours, so that the two substances were evenly dispersed in the solution. The solution was lyophilized to remove solvent. The resulting solid was heated at 10 °C min under an argon atmosphere. -1 The heating rate was added to 600°C and fired for 1.5 hours. After cooling to room temperature, soak it with 0.05mol / L hydrochloric acid for 3 hours. Finally, the solid was washed with water until neutral, and dried in vacuum to obtain a sulfur-doped graphene two-dimensional material decorated with ruthenium.

Embodiment 3

[0063] Weigh 10mg RuCl 3 ·6H 2 O and 20 mg of graphene oxide were added to 10 mL of deionized water, the pH value of the solution was adjusted to 1 by sulfuric acid, and ultrasonic vibration was performed for 6 hours, so that the two substances were evenly dispersed in the solution. The solution was lyophilized to remove solvent. The resulting solid was heated at 3 °C min under a nitrogen atmosphere. -1 The heating rate was added to 800°C and fired for 3 hours. After cooling to room temperature, soak it with 0.8mol / L hydrochloric acid for 8 hours. Finally, the solid was washed with water until neutral, and dried in vacuum to obtain a sulfur-doped graphene two-dimensional material decorated with ruthenium.

[0064] The test results of embodiment 1, embodiment 2 and embodiment 3 are as follows:

[0065] (1) SEM and TEM test results show that: the prepared composite material has a unique two-dimensional structure, and crystalline nanoparticles of elemental ruthenium can be s...

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Abstract

A ruthenium-modified sulfur-doped graphene two-dimensional material and its preparation and application. RuCl 3 ·6H 2 O and graphene oxide are added to deionized water, adjust the pH value to 0 to 6, disperse evenly with ultrasonic vibration, and then freeze-dry to remove the solvent to obtain a solid; the solid is roasted at high temperature in an inert atmosphere, cooled to room temperature, acid leached, and washed with water , dried to obtain a ruthenium-modified sulfur-doped graphene two-dimensional material. The ruthenium element-modified sulfur-doped graphene two-dimensional material prepared by the present invention has good conductivity, and the ruthenium element is evenly distributed as an active center; such ruthenium element-modified sulfur-doped graphene two-dimensional material can be used as electrocatalytic moisture Analytical hydrogen catalyst has the characteristics of low overpotential, high catalytic activity and long catalytic life.

Description

technical field [0001] The invention relates to a two-dimensional material, in particular to a sulfur-doped graphene two-dimensional material decorated with ruthenium simple substance and its preparation and application. Background technique [0002] Hydrogen energy is considered to be the most promising secondary energy source in the 21st century. As the most common element in nature, hydrogen has the highest specific energy density, up to 142.35kJ kg -1 , the energy produced per kilogram of hydrogen combustion is about 3 times that of gasoline, 3.9 times that of alcohol, and 4.5 times that of coke; secondly, the product of hydrogen combustion is the raw material for hydrogen production, which can realize resource The recycling process does not produce any greenhouse gases and pollutants. Therefore, hydrogen, as a clean energy carrier, is of great significance to solve energy and pollution problems. It is of great importance to develop efficient and stable water splittin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/02B01J37/34B01J37/08C25B1/04C25B11/06
CPCB01J27/02B01J35/0033B01J37/084B01J37/088B01J37/343C25B1/04C25B11/095Y02E60/36
Inventor 王宁高旭云张亚鸽
Owner NORTHWEST UNIV
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