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Preparation method and application of Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material

A porous carbon material, nanosheet technology, applied in the direction of electrolysis components, electrodes, energy input, etc., can solve the problems of low conductivity, negative impact on maintaining the original structure, etc., to make up for high costs, reduce production costs and time, The effect of improving production efficiency

Active Publication Date: 2022-05-24
NANJING XIAOZHUANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the strategy of hydrothermal carbonation has some inherent limitations that have yet to be addressed
For example, it must be performed in a relatively low temperature range (150–350 °C), and the obtained biomass-sourced carbon material has many oxygen-containing functional groups, resulting in its low electrical conductivity, which limits its application.
In addition, various hydrolysis products produced during the hydrothermal process of biomass have a negative impact on maintaining the original structure
Although various biomass precursors, carbonization methods, and other strategies have been developed to synthesize bio-based substances, there are still many challenges to be addressed for different application purposes

Method used

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  • Preparation method and application of Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material
  • Preparation method and application of Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material
  • Preparation method and application of Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material

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Effect test

Embodiment 1

[0034] A Ru-ZnFe x O y The preparation method of the heterogeneous nanosheet modified porous carbon material includes the following steps: washing the mushroom waste residue with distilled water, drying it in a 90°C oven, taking part of the mushroom waste residue and placing it in a clean alumina porcelain boat, and placing it in a tubular In the furnace, in an argon atmosphere, heat up to 350°C at a heating rate of 5°C / min, keep at this temperature for 1 hour, cool down to a certain temperature, take out and grind into powder to obtain a pre-carbonized product. Its shape is from figure 1 The TEM characterization results shown appear to be porous carbon nanosheets. from Figure 4 The XRD characterization results show that an obvious C peak appears when the diffraction angle is 22 degrees, and the surface is mainly composed of carbon elements. from Figure 5 It can be seen from the XPS characterization results that the pre-carbonized product is mainly composed of C and O, ...

Embodiment 2

[0038] A Ru-ZnFe x The preparation method of Oy heterogeneous nanosheet-modified porous carbon material includes the following steps: washing the mushroom waste with distilled water, drying it in a 90°C oven, taking part of the mushroom waste and placing it in a clean alumina porcelain boat, and placing it in a tube In the furnace, in an argon atmosphere, heated to 400°C at a heating rate of 4°C / min, maintained at this temperature for 0.5h, cooled to a certain temperature, taken out and ground into powder to obtain a pre-carbonized product.

[0039] Further, at room temperature, weigh 300mg pre-carbonized product, 200mg ZnCl 2 and 900mg FeCl 3 ·6H 2 O, fully grind and mix, transfer to an alumina ark, place in a tube furnace protected by nitrogen atmosphere, heat to 850°C at a rate of 4°C / min, hold for 1.5h, cool down to a certain temperature and collect the sample, then heat The collected samples were repeatedly washed and vacuum filtered 3 times until the samples were neut...

Embodiment 3

[0042] A Ru-ZnFe x O y The preparation method of the heterogeneous nanosheet modified porous carbon material includes the following steps: washing the mushroom waste residue with distilled water, drying it in a 90°C oven, taking part of the mushroom waste residue and placing it in a clean alumina porcelain boat, and placing it in a tubular In the furnace, in an argon atmosphere, heat up to 300°C at a heating rate of 6°C / min, keep at this temperature for 1.5h, cool down to a certain temperature, take out and grind into powder to obtain a pre-carbonized product.

[0043] Further, at room temperature, weigh 200mg pre-carbonized product, 300mg ZnCl 2 and 800mg FeCl 3 ·6H 2 O, fully grind and mix, transfer to an alumina ark, place in a tube furnace protected by nitrogen atmosphere, heat to 750 ℃ ​​at a rate of 6 ℃ / min, hold for 2.5 h, cool down to a certain temperature and collect the sample, and then heat The collected samples were repeatedly washed and vacuum filtered 3 times...

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Abstract

The invention provides a preparation method of a Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material, which is characterized in that mushroom waste residues and low-toxicity metal salts (ferric salt, zinc salt and ruthenium salt) are used as raw materials, and a novel Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material is constructed by optimizing and regulating the preparation method and strategy. According to the material, a simple and green preparation method of the biomass-based carbon material loaded Ru nano-catalyst capable of being prepared in an amplified manner is developed by utilizing heteroatom sources (amino acid, protein and the like) rich in biomass mushroom residues under the condition that no external template is added. A further research discovers that the Ru-ZnFexOy heterogeneous nanosheet modified porous carbon material as an electrocatalyst shows excellent catalytic activity in hydrogen production from alkaline pure water and seawater, and the catalytic activity is superior to that of an existing commercial 20% Pt / C catalyst.

Description

technical field [0001] The invention relates to the technical field of biomass porous carbon materials, in particular to a Ru-ZnFe x O y Preparation method and application of heterogeneous nanosheet modified porous carbon material. Background technique [0002] Hydrogen is a promising alternative energy source due to its sustainability and environmental friendliness. Electrochemical water splitting is considered to be a clean, simple, and high-purity method for hydrogen production. The hydrogen evolution reaction (HER) is one of the important reactions in electrochemical water splitting, and its efficiency mainly depends on the electrocatalyst. Generally, platinum group metals (PGMs) have proven to be the most efficient HER electrocatalysts, but their widespread application is limited by the scarcity and high cost of noble metals. In order to reduce the usage of PGMs and improve the atom utilization, it is of great significance to precisely control the size and nanostruc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/093C25B1/04C25B11/031
CPCC25B11/031C25B11/093C25B1/04Y02P20/133Y02E60/36
Inventor 刘苏莉周峰钱春竹邵文倩李亭亭陈昌云张星玥顾祥耀马李刚李盛杰
Owner NANJING XIAOZHUANG UNIV
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