Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of monoatomic material, its preparation method and application

An atomic and preparation process technology, applied in the field of single-atom materials, can solve the problems of low single-atom loading, difficulty in controllable preparation, and limited form of single-atom materials, and achieve the effect of controllable preparation

Active Publication Date: 2022-04-01
TSINGHUA BERKELEY SHENZHEN INST
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above literature has provided some help to the development of the current single-atom materials, there are still problems such as the limited form of single-atom materials, difficulty in achieving controllable preparation, and low single-atom loading.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of monoatomic material, its preparation method and application
  • A kind of monoatomic material, its preparation method and application
  • A kind of monoatomic material, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A preparation method of a monatomic material comprises the steps of:

[0071] (1) The monoatomic layer molybdenum disulfide precursor is placed in the reaction chamber, and the reaction chamber is evacuated until the vacuum degree of the reaction chamber is 1.5mbar;

[0072] (2) Inject hydrogen at a flow rate of 20 sccm for 2 minutes until the air pressure is stable;

[0073] (3) An AC power source with a frequency of 100 kHz was used to excite the plasma, the precursor was treated with the plasma, the reaction temperature was controlled at 60° C., and the processing time was 80 s to obtain a molybdenum single-atom material.

[0074] figure 2 is an atomically resolved transmission electron microscope image of the molybdenum single-atom material, image 3 and Figure 4 The transmission electron microscope images and simulation images of the molybdenum single-atom materials of type 1 are shown respectively. It can be seen from the figure that the prepared molybdenum s...

Embodiment 2

[0077] The difference from Example 1 is that the plasma treatment time in step (3) is 160s.

Embodiment 3

[0079] The difference from Example 1 is that in step (3) an AC power source with a frequency of 20 kHz is used to excite the plasma, the precursor is treated with the plasma, the reaction temperature is controlled at 200° C., and the treatment time is 240 s to obtain a molybdenum monoatomic material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a single-atom material, its preparation method and application. The method includes the following steps: treating the precursor with plasma to obtain a single-atom material, and elements in the single-atom material include metal elements. The present invention creatively proposes the use of plasma to prepare single-atom materials containing metal elements, and realizes the controllable preparation of a series of single-atom materials by controlling the gas type and flow rate, reaction time and temperature of the reaction atmosphere introduced into it; the preparation of the present invention The method can realize the single atom of a single element and the single atom of multiple elements; the single-atom material of the present invention is used as the hydrogen evolution electrocatalyst, which can be applied to catalyzing acidic and alkaline systems for electrolysis of water for hydrogen evolution, and the current density during hydrogen production can be up to 2A / cm 2 , so that it can better adapt to the industrial level of high current density electrolysis of water to produce hydrogen.

Description

technical field [0001] The invention belongs to the technical field of single-atom materials, and in particular relates to a single-atom material, its preparation method and application. Background technique [0002] Since the first report, due to their excellent catalytic activity, high active center utilization and unique physical and chemical properties, many scholars have invested in the research and application of single-atom materials. It is currently a major challenge in this field to develop efficient, universal, and high single-atom loading preparation methods. [0003] At present, the preparation of single-atom materials is mainly achieved by thermal diffusion, in situ pyrolysis, template synthesis, or ion exchange methods. These single-atom materials are limited to the form of powder or mesoporous materials, which limits their applications in some fields. [0004] CN109225257A discloses a supported single-atom catalyst and its preparation method. The catalyst is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J27/047B01J23/28B01J23/30B01J23/18B01J23/08B01J23/42B01J37/34C25B1/04C25B11/081C25B11/075C25B11/089C25B11/091
CPCB01J27/051B01J27/047B01J23/28B01J23/30B01J23/18B01J23/08B01J23/42B01J37/349C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 刘碧录罗雨婷
Owner TSINGHUA BERKELEY SHENZHEN INST