Supercharge Your Innovation With Domain-Expert AI Agents!

Preparation method and application of cobalt-doped molybdenum disulfide bifunctional electrocatalyst

A technology of molybdenum disulfide and electrocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of unreachable catalytic efficiency, and improve the conductivity, interface charge transfer efficiency and stability Good, the effect of multiple electrochemical reaction areas

Pending Publication Date: 2021-01-29
HEFEI NORMAL UNIV
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, the catalytic performance of molybdenum disulfide-based electrocatalytic materials has been significantly improved, however, its catalytic efficiency has not yet reached the level of industrial-grade noble metal catalysts.

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
  • Preparation method and application of cobalt-doped molybdenum disulfide bifunctional electrocatalyst
  • Preparation method and application of cobalt-doped molybdenum disulfide bifunctional electrocatalyst
  • Preparation method and application of cobalt-doped molybdenum disulfide bifunctional electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, 4.567g of thiourea and 17.302g of ammonium molybdate were weighed and dissolved in 80mL of deionized water. Then, 0.291g of cobalt nitrate was weighed and added to the above solution, and magnetically stirred at room temperature to obtain a uniform solution. Subsequently, the above solution was transferred to a 100 mL stainless steel autoclave lined with polytetrafluoroethylene, and placed in a blast oven, and the reaction temperature and time were 220 degrees Celsius and 24 hours, respectively. After the reaction, cool down to room temperature naturally, take out the sample and wash it several times in absolute ethanol and deionized water successively, and dry the sample in a vacuum oven at 60 degrees Celsius to obtain a black powder. Working electrode preparation process: take 10 mg of black powder, 25 microliters of Dupont membrane solution and 400 microliters of isopropanol, mix them and ultrasonicate for 60 minutes. The obtained solution was evenly spread on...

Embodiment 2

[0033] The preparation process conditions of the samples in this example are exactly the same as those in Example 1, except that the doping amount of cobalt nitrate in this example is 0.058g. The results of the XRD spectrum of the cobalt-doped molybdenum disulfide prepared in this example show that the samples also have diffraction peaks at 2θ=14.3°, 33.5° and 58.3°, corresponding to MoS 2 The (002), (101) and (110) crystal planes also have two diffraction peaks at 2θ=9.2° and 18.2°, which come from the crystal plane spacing of with lattice, the diffraction peaks are consistent with the low crystallinity of MoS 2 related. Raman spectrum test result shows, the cobalt doped molybdenum disulfide that present embodiment obtains is also 378cm -1 and 405cm -1 Two Raman characteristic peaks appearing in two places correspond to E 2g 1 and A 1g The vibration mode indicates that there are also a large number of molybdenum disulfide nanosheets in this sample. SEM test results ...

Embodiment 3

[0035] The preparation process conditions of the samples in this example are exactly the same as those in Example 1, except that the doping amount of cobalt nitrate in this example is 0.174g. Compared with Example 1, there is no obvious change in the X-ray diffraction peak position of the sample in this example, and the peak intensity is relatively weak. Still at 378cm -1 and 405cm -1 Two Raman characteristic peaks were observed, and the SEM photos showed that the cobalt-doped molybdenum disulfide prepared in this example also had a flower-like structure, in which a large number of boundary active sites of the molybdenum disulfide nanosheets were exposed, which contributed to Improve the electrocatalytic performance of the catalytic material. The impedance spectrum curve obtained by the present embodiment is fitted, and the catalytic material charge transfer resistance (R ct ) is 1296Ω. The HER polarization curve of the cobalt-doped molybdenum disulfide obtained by the pre...

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 discloses a preparation method of a cobalt-doped molybdenum disulfide bifunctional electrocatalyst, and the method comprises the following steps of: dissolving thiourea, ammonium molybdate and cobalt nitrate in a certain ratio in water, and performing stirring at room temperature to obtain a uniform solution; transferring the uniform solution into a high-pressure kettle, and carryingout hydrothermal reaction for 20-40h at a temperature of 180-250DEG C; and after the reaction, performing natural cooling to room temperature, performing cleaning with anhydrous ethanol and deionizedwater alternately for multiple times, and performing drying in a vacuum oven at 60DEG C to obtain finished black powder; the bifunctional electrocatalyst is applied to a working electrode, and the method comprises the following steps of: taking the black powder, a Dupont film solution and isopropanol, ultrasonically mixing the substances, uniformly coating carbon paper with the mixture, and performing drying to obtain the working electrode. The cobalt-doped molybdenum disulfide nano material prepared by the method has a sheet-shaped structure of which the longitudinal edge is terminated, anda nano sheet grows outwards in a manner of being perpendicular to a core to form a flower-like secondary structure; and the prepared working electrode is large in specific surface area, high in electrocatalytic activity and good in stability.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a preparation method and application of a cobalt-doped molybdenum disulfide bifunctional electrocatalyst. Background technique [0002] Energy is the foundation of economic development and social progress. With the development of human society, especially since the beginning of the new century, human consumption of traditional fossil energy has been increasing. crisis. In addition, the use of fossil energy will have adverse effects on air, water and climate, causing serious environmental problems. Energy shortages and environmental problems will lead to sustainable economic and social development. In order to solve this problem faced by the world, countries are looking for and developing new renewable energy as a substitute for traditional energy. [0003] Among the many solutions to the energy crisis, electrocatalytic hydrogen evolution is considered to be an ener...

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
IPC IPC(8): B01J27/051B01J35/10C25B1/04C25B11/091
CPCB01J27/0515C25B1/04B01J35/33B01J35/61Y02E60/36
Inventor 吕建国赵敏魏薪王顺马宇璇周高良王咏琪
Owner HEFEI NORMAL UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com