Preparation of nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on sodium chloride template

A carbon-based catalyst, sodium chloride technology, applied in the field of electrocatalysis, can solve the problems of low catalytic activity, low doping efficiency and active site density, etc., and achieves a wide range of raw material sources, a simple and easy-to-operate method, and broad application prospects. Effect

Inactive Publication Date: 2020-07-31
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon-based catalysts still face key scientific problems such as low doping efficiency, low active site density, and low catalytic activity that need to be solved urgently.

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 of nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on sodium chloride template
  • Preparation of nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on sodium chloride template
  • Preparation of nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on sodium chloride template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] refer to figure 1 Shown is a schematic diagram of the preparation process of the nickel-molybdenum-nitrogen co-doped carbon-based catalyst of this embodiment.

[0021] (1) Take by weighing 0.237g nickel chloride hexahydrate, 0.273g molybdenum pentachloride and 25g sodium chloride and be dissolved in 50ml deionized water; Under room temperature, stir and dissolve to obtain a mixed solution with a magnetic stirrer at a stirring speed of 500r / min . Then add 0.62g of trishydroxymethylaminomethane, and continue to stir for 0.5h to obtain mixed solution A. Slowly add 100 mg of dopamine hydrochloride to the mixed solution A, and stir for 12 h with a magnetic stirrer at a stirring speed of 300 r / min at room temperature to obtain a mixed solution B. Put the mixed liquid B in the refrigerator for 24 hours to freeze, and then place it in a freeze dryer at -50°C for 60 hours in vacuum to obtain the precursor. Grind the obtained precursor into powder and transfer it to a tube fur...

Embodiment 2

[0024] Weigh 10 g of the 1-Ni-Mo-N-C catalyst synthesized in Example 1 and soak it in 100 ml of 2M hydrochloric acid solution for 8 hours. Then, they were washed with deionized water and ethanol by centrifugation until there was no sodium chloride, and then dried in a vacuum oven at 80°C for 12 hours. Grind the dried powder into fine powder and transfer it to a tube furnace for secondary annealing. The annealing conditions: under an argon atmosphere with a gas flow rate of 50 sccm, the temperature rise range is 30°C-830°C, and the temperature rise rate is 5°C / min, and Maintained at 830°C for 2h. After cooling to room temperature, a nickel-molybdenum-nitrogen co-doped carbon-based catalyst was obtained after secondary annealing, which was denoted as 2-Ni-Mo-N-C.

[0025] The 2-Ni-Mo-N-C catalyst prepared in this embodiment 2 adopted a three-electrode system in the electrocatalytic hydrogen evolution and oxygen evolution tests, and the working electrode was a rotating disk elec...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on a sodium chloride template. According to the method, nickel chloride hexahydrate isused as a nickel source, molybdenum pentachloride is used as a molybdenum source, trihydroxymethyl aminomethane is used as a pH regulating material, dopamine hydrochloride is used as an adsorbent, and inorganic salt sodium chloride is used as a template. The preparation method mainly comprises the following steps: dissolving nickel chloride hexahydrate, molybdenum pentachloride and sodium chloride in deionized water at room temperature to obtain a mixture; sequentially adding trihydroxymethyl aminomethane and dopamine hydrochloride, and continuously stirring to obtain a uniform mixed solution; freeze-drying the mixed solution to obtain a catalyst precursor; carrying out high-temperature pyrolysis carbonization on the obtained precursor in an argon atmosphere, and carrying out centrifugalwashing to remove a pure product; and carrying out high-temperature annealing on the obtained product again to obtain a nickel-molybdenum-nitrogen co-doped carbon-based catalyst sample with stable performance. The method is simple, easy to operate and low in cost, large-batch preparation can be achieved, and the prepared nickel-molybdenum-nitrogen co-doped carbon-based catalyst is high in electrocatalytic activity and good in stability and has good application prospects.

Description

technical field [0001] The invention relates to a nickel-molybdenum-nitrogen co-doped carbon-based catalyst material based on a sodium chloride template and a preparation method thereof, which can be applied to the technical field of electrocatalysis. Background technique [0002] With the continuous acceleration of social industrialization, the contradiction between energy demand and environmental demand has become increasingly prominent. The excessive consumption of fossil fuels not only exacerbates the greenhouse effect, but also brings many environmental problems such as acid rain and soil pollution. The development of renewable green energy as a substitute for fossil fuels is crucial to the sustainable development of the economy and society. Among the currently known green energy sources, hydrogen energy has attracted widespread attention due to its high efficiency and cleanliness. Water electrolysis is a simple and clean technology for industrial hydrogen production....

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): B01J27/24B01J37/08C25B1/04C25B11/06
CPCB01J27/24B01J37/08B01J37/082C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 姬海宁牛佳琪牛晓滨杨建向飞杨家超蒋杰王志明李含冬余鹏
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap