Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method and application of vesicular phosphate ion functionalized cobalt oxide nano material

A nanomaterial, vesicle-like technology, applied in the field of electrocatalysis, can solve the problem that the charge energy storage and conversion ability cannot be fully released, achieve good electrochemical kinetic effect, improve electrocatalytic activity, and reduce overpotential. Effect

Pending Publication Date: 2021-08-10
YANGZHOU UNIV
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chemical reaction on the surface, the charge storage and conversion capabilities cannot be fully released.
Therefore, transition metal oxides are somewhat limited in OER electrocatalysis.

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 vesicular phosphate ion functionalized cobalt oxide nano material
  • Preparation method and application of vesicular phosphate ion functionalized cobalt oxide nano material
  • Preparation method and application of vesicular phosphate ion functionalized cobalt oxide nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The Co(NO 3 ) 2 . 6H 2 O was dissolved in deionized water to make a 0.5 mol / L cobalt salt aqueous solution.

[0041] will C 4 H 6 N 2 Dissolve in deionized water to make 1.095 mol / L organic ligand aqueous solution.

[0042] Dissolve 0.3 g of cetyltrimethylammonium bromide in 27 mL of deionized aqueous solution, and add 7.5 mL of the above-mentioned organic ligand aqueous solution and 375 μL of cobalt salt aqueous solution at 37 °C under the condition of constant temperature water bath stirring, and after stirring for 2 h , take the solid, wash three times with DMF and methanol respectively, and dry to obtain a hollow spherical cobalt complex.

[0043] The hollow spherical cobalt complex was calcined in a tube furnace in an air atmosphere. The initial temperature was 20 °C, the heating rate was 5 °C / min, and the cobalt complex was held at 350-400 °C for 3 hours. Cobalt oxide.

[0044] According to hollow spherical cobalt oxide with NaH 2 PO 4 The mass ratios w...

Embodiment 2

[0046] Put 0.55 g of Co(NO 3 ) 2 . 6H 2 O was dissolved in 15 mL methanol solution to prepare cobalt salt methanol solution, 0.62 g of C4H6N2 ligand was dissolved in 15 mL methanol solution to prepare organic ligand methanol solution, washed with methanol for 3 times after ultrasonication for 30 minutes, and dried to obtain dodecahedral Cobalt complex.

[0047] The dodecahedral cobalt complex was calcined in a tube furnace in an air atmosphere. The initial temperature was 20 °C, the heating rate was 5 °C / min, and the dodecahedron was maintained at 350 to 400 °C for 3 hours. Hedral cobalt oxide.

[0048] Cobalt oxide with NaH according to dodecahedron 2 PO 4 The mass ratio is 1:10 (the phosphating ratio is 1:10) for the phosphating reaction, and the dodecahedral cobalt oxide and NaH are weighed respectively. 2 PO 4 , and NaH 2 PO 4 Put a porcelain boat, the dodecahedral cobalt oxide is put into another porcelain boat, and it is calcined in a tube furnace under nitroge...

Embodiment 3

[0050] Put 0.15 g Co(NO 3 ) 2 . 6H 2 O, 0.13 g Na 2 C 2 O 4 and 0.14 g C 6 H 12 N 4 It was added to a mixed solution of 20 mL of deionized water and 5 mL of ethanol, stirred at room temperature for 4 hours, and the solid was washed with water and ethanol—three times and then dried to obtain a rod-shaped cobalt compound.

[0051] The rod-shaped cobalt compound was calcined in a tube furnace in an air atmosphere, and the rod-shaped cobalt oxide was obtained by calcination at a starting temperature of 20 °C, a heating rate of 5 °C / min, and 350-400 °C for 3 hours. .

[0052] According to rod-shaped cobalt oxide with NaH 2 PO 4 The mass ratio is 1:10 (the phosphating ratio is 1:10) to carry out the phosphating reaction, and the rod-shaped cobalt oxide and NaH are weighed respectively. 2 PO 4 , and NaH 2 PO 4 Put into a porcelain boat, the rod-shaped cobalt oxide is put into another porcelain boat, calcined in a tube furnace under nitrogen atmosphere, nitrogen is conn...

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 and application of a vesicular phosphate ion functionalized cobalt oxide nano material, and relates to the technical field of electro-catalysis, in particular to preparation of an electrode material. The precursor used by the vesicular P-CoOx nano material is nontoxic and environment-friendly in raw material, low in cost and simple in process, is prepared through simple calcination, and is easy to operate. The vesicles can be obtained from various cobalt oxides, and continuous large-scale production is easy. The phosphate ions can modify the surface of the transition metal oxide so that the surface active sites of the OER electro-catalytic reaction are increased, the electron transmission is improved, the charge transfer resistance is reduced, and the electro-catalytic performance of the OER is remarkably improved. The vesicular P-CoOx nano material can obviously reduce the overpotential during electrochemical water decomposition, and has the advantages of better electrochemical stability, electrochemical kinetic effect and the like.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to the preparation of electrode materials. Background technique [0002] Oxygen evolution reaction (OER) plays an important role in electrochemical energy storage and conversion processes, including fuel cells, water splitting electrolyzers, and metal-air batteries. Therefore, understanding the oxygen evolution reaction can further facilitate the development of clean and sustainable electrochemical energy storage and conversion systems. Electrochemical water splitting is one of the important methods for the sustainable production of hydrogen fuel, and the kinetics of hydrogen evolution reaction at the cathode is closely related to the kinetics of oxygen evolution at the anode. Therefore, the efficient electrocatalyst for the oxygen evolution reaction at the anode can effectively improve the efficiency of water splitting. It is well known that the OER process involves mult...

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): C01G51/04
CPCC01G51/04C01P2004/34C01P2004/03C01P2004/04C01P2004/30C01P2004/16C01P2006/40Y02E60/36
Inventor 周会杰金心果庞欢郭笑天郑莎莎段慧宇
Owner YANGZHOU UNIV
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
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