Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

mos2/cos2 composite cracking water hydrogen production low overpotential electrocatalyst and its preparation method by vulcanization method

An electrocatalyst, overpotential technology, applied in physical/chemical process catalysts, chemical instruments and methods, electrolysis process, etc., can solve the problems of energy waste, overpotential, etc.

Active Publication Date: 2018-11-23
JILIN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the overpotential of non-precious metal electrocatalysts in the prior art is too high and the energy is wasted seriously, the present invention has carried out in-depth research on the mechanism of hydrogen production by electrocatalytic cracking of water, and completed the invention

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
  • mos2/cos2 composite cracking water hydrogen production low overpotential electrocatalyst and its preparation method by vulcanization method
  • mos2/cos2 composite cracking water hydrogen production low overpotential electrocatalyst and its preparation method by vulcanization method
  • mos2/cos2 composite cracking water hydrogen production low overpotential electrocatalyst and its preparation method by vulcanization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Take 0.291 gram of cobalt nitrate hexahydrate solid particles, add 15 milliliters of deionized water in the reaction vessel and stir for 10 minutes to make it dissolve completely;

[0023] (2) Get 0.242 grams of sodium molybdate dihydrate solid particles in another reaction vessel, then add 15 milliliters of deionized water and stir for 10 minutes until sodium molybdate dihydrate is completely dissolved;

[0024] (3) Mix the solutions in step (1) and step (2), and then stir for 1.5 hours;

[0025] (4) the solution in step (3) is transferred in the reactor of 100 milliliters with stainless steel substrate, then this reactor is put into the baking oven of the electric blast that has been warming up to 140 degrees Celsius in advance and keeps 12 hours, then When the temperature of the reaction kettle drops to room temperature, the supernatant in the reaction kettle is poured out, the substrate is washed 4 times with deionized water, and 3 times with absolute ethanol, a...

Embodiment 2

[0030] (1) Get 0.291 gram of cobalt nitrate hexahydrate solid particles and 0.121 gram of urea in the reaction vessel, add 30 milliliters of deionized water and stir for 30 minutes to make the reactant dissolve completely;

[0031] (2) the solution in the step (1) is transferred in the reactor of 100 milliliters with stainless steel substrate, then this reactor is put into the baking oven of the electric blast that has been warming up to 140 degrees Celsius in advance and keeps 12 hours, then When the temperature of the reaction kettle drops to room temperature, the supernatant in the reaction kettle is poured out, the substrate is washed 4 times with deionized water, and 3 times with absolute ethanol, and then the washed product is placed in an electric heating blast at 80 degrees Celsius. Drying in the drying box for 24 hours has obtained the precursor of cobalt disulfide to be prepared;

[0032] (3) Weigh 70 mg of the precursor prepared in step (2) into the quartz boat, and...

Embodiment 3

[0036] (1) Weigh 0.242 grams of sodium molybdate dihydrate solid particles into the quartz boat, and weigh 3 grams of sublimed sulfur into another quartz boat, and then push the quartz boat containing the precursor into the tube Type furnace heating zone, and then push the quartz boat containing sublimated sulfur into the heating zone of the same tube furnace, and ensure that the quartz boat containing sublimated sulfur is located behind the quartz boat containing precursors, so that after high temperature sublimation The sulfur vapor passes through the precursor under the drainage of nitrogen, so that the precursor can be vulcanized;

[0037] (2) The air in the quartz tube in the tube furnace of step (1) is discharged, then feed nitrogen, set the program according to the heating rate of 40 degrees Celsius / min. The heating temperature is set to 400 degrees Celsius, and the holding time is set to 2 hours for roasting and vulcanization , when the temperature drops to room temper...

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
quality scoreaaaaaaaaaa
Login to View More

Abstract

A MoS2 / CoS2 composite low overpotential electrocatalyst for water cracking and hydrogen production and its preparation method by sulfidation method belongs to the technical field of catalyst preparation. The electrocatalyst of the present invention specifically uses a hydrothermal method to prepare a precursor from one of cobalt nitrate, cobalt chloride, cobalt acetate, and cobalt sulfate, and one of sodium molybdate and ammonium molybdate. Wash with water to remove unreacted sodium ions, cobalt ions and other impurities and then dry. Then put a certain amount of dried precursor and an appropriate amount of sublimated sulfur in two quartz boats respectively, and control a certain temperature rise in a nitrogen-protected environment. rate and roasting temperature, and after roasting for a certain period of time, the MoS2 / CoS2 composite water cracking water hydrogen production low overpotential electrocatalyst of the present invention is obtained. The overpotential of this electrocatalyst at an AC current density of ‑60mA / cm‑2 is only ‑287mV, which is the lowest overpotential among non-noble metal electrocatalysts.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a MoS 2 / CoS 2 Composite cracking water hydrogen production low overpotential electrocatalyst and its preparation method by sulfuration method. Background technique [0002] With the acceleration of the global industrialization process, coal, oil, and natural gas, the pillar energy sources for the survival of the three major industrial productions, will be exhausted. As a new energy source, hydrogen energy has high calorific value and no pollution. Natural advantages such as a wide range of raw materials have attracted more and more attention from countries all over the world. How to prepare sustainable hydrogen energy is a common concern of energy scientists all over the world. Electrocatalytic cracking of water to produce hydrogen is a sustainable and large-scale production A means of hydrogen, but the biggest problem facing electrocatalytic water production of h...

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): B01J27/051C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/0515B01J35/33Y02E60/36
Inventor 张宗弢岳新政王润伟易莎莎
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com