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

Oxygen group cobalt-based catalyst, preparation method and application of electrocatalytic oxygen evolution

A catalyst and electrocatalyst technology, which is applied in the directions of cobalt oxide/cobalt hydroxide, metal selenide/telluride, electrodes, etc. Due to the problems of poor reproducibility of the base catalyst, it can achieve the effect of good oxygen evolution catalytic activity, good electrochemical oxygen evolution performance and controllable morphology.

Inactive Publication Date: 2020-02-11
SHANDONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation conditions and required equipment are relatively harsh, the operation is complicated, and high temperature is required; the price of raw materials is high, and some technologies require the addition of surfactants or even expensive ionic liquids to control the morphology
At the same time, the reproducibility of cobalt-based catalysts with special morphology is poor, which is not conducive to large-scale industrial production
In addition, when comparing the electrocatalytic performance of different catalysts, it is easily disturbed by many factors. Even the same catalyst with similar morphology but different preparation methods has different electrocatalytic performance. Therefore, it is difficult to better explore the different cobalt-based The oxygen evolution activity of the catalyst brings certain difficulties to the selection of catalysts for industrial production

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
  • Oxygen group cobalt-based catalyst, preparation method and application of electrocatalytic oxygen evolution
  • Oxygen group cobalt-based catalyst, preparation method and application of electrocatalytic oxygen evolution
  • Oxygen group cobalt-based catalyst, preparation method and application of electrocatalytic oxygen evolution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Dissolve 100mg of cobalt nitrate hexahydrate and 30mg of urea in secondary water, and ultrasonicate for a period of time to form a uniform solution. Transfer to a reactor and react at 180°C for 1h. After the reaction is completed, cool to room temperature, centrifuge, and wash the solid powder with ethanol several times to separate organic impurities and by-products in the product. Then put the product into a vacuum oven and dry at room temperature for 12 hours. A fuchsia precursor was obtained. The morphology of the prepared cobalt tetroxide precursor was characterized by transmission electron microscopy, as shown in figure 1a, 1b shown.

[0037] The prepared precursor was put into a tube furnace and reacted at 300 °C for 2 h in an air atmosphere. Wash the obtained product once with water and ethanol, then put it into a vacuum drying oven, and dry it at room temperature for 12 hours to obtain rod-shaped tricobalt tetroxide, which is the cobalt-based oxygen evolutio...

Embodiment 2

[0041] Dissolve 100mg of cobalt nitrate hexahydrate and 30mg of urea in secondary water, and ultrasonicate for a period of time to form a uniform solution. Transfer to the reaction kettle and react at 180°C for 11h. After the reaction is completed, cool to room temperature, centrifuge, and wash the solid powder with ethanol several times to separate organic impurities and by-products in the product. Then put the product into a vacuum oven and dry at room temperature for 12 hours. A fuchsia precursor was obtained. The morphology of the prepared flaky cobalt trioxide precursor was characterized by transmission electron microscopy, as shown in figure 1 c, 1d shown.

[0042] The prepared flake precursor was put into a tube furnace and reacted at 300 °C for 2 h in an air atmosphere. Wash the obtained product once with water and ethanol, then put it into a vacuum drying oven, and dry it at room temperature for 12 hours to obtain flaky cobalt tetroxide, which is the cobalt-based ...

Embodiment 3

[0046] Put 10 mg of selenium powder into a mixed solution of 3 mL of ethylene glycol and 1 mL of hydrazine, ultrasonicate for a period of time, add 5 mg of rod-shaped cobalt trioxide nanopowder prepared in Example 1, continue ultrasonication, transfer to a reaction kettle, and react at 180°C for 12 hours. After the reaction is completed, cool to room temperature, wash with ethanol several times, and dry at room temperature in vacuum for one day to obtain rod-shaped cobalt selenide, which is the cobalt-based oxygen evolution catalyst of the present invention.

[0047] The prepared cobalt selenide was characterized by transmission electron microscopy, as shown in image 3 a, 3b shown. It can be seen that the morphology of the catalyst is nanorod.

[0048] Test the oxygen evolution performance of the cobalt-based oxygen evolution catalyst prepared in this embodiment, such as Figure 4 shown. Depend on Figure 4 It can be seen that the current density is 50mV / cm 2 , the overp...

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
electric potential / voltageaaaaaaaaaa
Login to View More

Abstract

The invention relates to an oxygen group cobalt-based catalyst, a preparing method and electro-catalysis oxygen evolution application. Cobalt nitrate and urea are used as raw materials, different hydro-thermal synthesis times are controlled, and precursors with different morphologies can be obtained. Different-morphology cobalt-based precursors including the nanometer rod cobalt-based precursor and the nanometer sheet cobalt-based precursor obtained after 1 h of hydrothermal reaction and 11 h of hydrothermal reaction are taken, high temperature firing under the air atmosphere in a tube furnaceis carried out, and a rodlike cobaltosic oxide nanometer material and a sheet cobaltosic oxide nanometer material are obtained. Different-morphology cobaltous oxide and selenium powder are subject toalcohothermal synthesis under the effect of hydrazine hydrate to form rodlike cobaltous selenide and sheet cobaltous selenide. Compared with the rigor experiment condition for preparing the cobalt-based catalyst with the special morphology, the strategy for improving the electrocatalytic activity through the simple adjusting structure and composition is achieved.

Description

technical field [0001] The invention belongs to the field of energy materials, and relates to a preparation method and an application of an electrocatalytic water splitting oxygen catalyst. Background technique [0002] Today, the excessive use of traditional energy such as coal, oil, and natural gas has caused serious pollution and greatly damaged the ecological environment; at the same time, traditional energy is non-renewable energy. With the increasing demand, people are facing the exhaustion of traditional energy threat. Therefore, green and environmentally friendly new energy sources, such as: wind energy, solar energy, nuclear energy, geothermal energy, hydrogen energy, etc., have attracted widespread attention, among which efficient and clean hydrogen energy is the focus of research. Although there are many sources of hydrogen, the electrolysis of water to produce hydrogen is the most promising method among many methods. The technology consists of two half-reaction...

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): C25B11/06C25B1/04C01G51/04B82Y40/00C01B19/04
CPCB82Y40/00C01B19/007C01G51/04C01P2004/04C01P2004/16C01P2004/20C01P2006/40C25B1/04C25B1/55C25B11/091Y02E60/36
Inventor 李钟号张晨韵
Owner SHANDONG 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