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

Electrocatalytic ammonia oxidation hydrogen production electrode material as well as preparation method and application thereof

An electrode material and ammoxidation technology, applied in the field of electrocatalytic materials, can solve the problems of limiting the current density and stability of Pt-based catalysts, difficulty in realizing large-scale production and application, and lack of precious metal Pt resources, so as to improve the catalytic stability of ammoxidation , low raw material cost, catalytic activity and stability improvement effect

Active Publication Date: 2020-04-28
WESTLAKE UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research on the ammoxidation reaction uses Pt-based catalysts as electrode materials. Although Pt-based catalysts have a small overpotential in the ammoxidation reaction, there are also active centers that are expensive and easy to adsorb N atoms. However, the problem of rapid deactivation limits the current density and stability of Pt-based catalysts (Current Opinion in Electrochemistry 9(2018) 151-157)
In addition, due to the scarcity and high price of precious metal Pt resources, its preparation cost is high, and it is difficult to realize large-scale production and application.

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
  • Electrocatalytic ammonia oxidation hydrogen production electrode material as well as preparation method and application thereof
  • Electrocatalytic ammonia oxidation hydrogen production electrode material as well as preparation method and application thereof
  • Electrocatalytic ammonia oxidation hydrogen production electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Pretreatment of foamed nickel: Cut commercially available nickel foam into a size of 3cm×5cm, immerse in acetone, and ultrasonicate for 15min. Remove oil stains on the surface, wash with water 3 times, each time for 5 minutes, and wash off the acetone; immerse in 3mol / L hydrochloric acid, ultrasonicate for 5 minutes, remove the oxide film on the surface of foamed nickel, then wash with water 3 times, each time for 3 minutes, remove Cl - , submerged in ethanol, ultrasonicated for 5 minutes, washed with water three times, each time for 3 minutes, and dried under vacuum conditions for later use.

[0032] (2) Dissolve 2mmol of ammonium fluoride and 5mmol of urea in 50mL of deionized water, and after magnetically stirring for 15min, transfer the mixed solution into a 100mL reaction kettle, and then add the cleaned 3cm×5cm nickel foam into it; Place it in a constant temperature box at 120°C, react for 12 hours; cool down naturally, wash, and dry in vacuum at 60°C to obtai...

Embodiment 2

[0035] (1) Commercially available nickel foam is pretreated according to Example 1.

[0036] (2) Dissolve 0.5mmol of nickel nitrate hexahydrate, 2mmol of ammonium fluoride, and 5mmol of urea in 50mL of deionized water. After magnetically stirring for 15min, transfer the mixed solution into a 100mL reaction kettle, and then add 3cm× 5cm foam nickel; put the reaction kettle in a thermostat at 140°C, and react for 8 hours; cool down naturally, wash, and vacuum dry at 60°C to obtain Ni(OH) 2 / NF.

[0037] (3) Dissolve 0.3mmol of copper nitrate trihydrate, 2mmol of ammonium fluoride, and 5mmol of urea in 50mL of deionized water, and after magnetically stirring for 15min, transfer the mixed solution into a 100mL reactor, and then add the Ni in the above step. (OH) 2 / NF; put the reaction kettle in a thermostat at 140°C, and react for 12 hours; cool down naturally, wash, and dry in vacuum at 60°C to obtain Cu 2 O-Ni(OH) 2 / NF.

Embodiment 3

[0039] (1) Commercially available nickel foam is pretreated according to Example 1.

[0040] (2) Dissolve 1.0mmol of nickel nitrate hexahydrate, 2mmol of ammonium fluoride, and 5mmol of urea in 60mL of deionized water. After magnetically stirring for 15 minutes, transfer the mixed solution into a 100mL reaction kettle, and then add 3cm× 5cm foam nickel; put the reaction kettle in a 160°C incubator, and react for 15 hours; naturally cool down, wash, and vacuum-dry at room temperature to obtain Ni(OH) 2 / NF.

[0041] (3) Dissolve 0.5mmol copper nitrate trihydrate, 2mmol ammonium fluoride, and 5mmol urea in 60mL of deionized water, and after magnetic stirring for 15min, transfer the mixed solution into a 100mL reactor, and then add the Ni in the above step. (OH) 2 / NF; put the reaction kettle in a thermostat at 100°C, and react for 14 hours; cool down naturally, wash, and vacuum-dry at room temperature to obtain Cu 2 O-Ni(OH) 2 / NF.

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 provides an electrocatalytic ammonia oxidation hydrogen production electrode material and a preparation method and application thereof, and belongs to the technical field of electrocatalytic materials. The electrocatalytic ammoxidation hydrogen production electrode material is low in price, easy to prepare and stable in performance, and is obviously different from a conventional Pt-based electrocatalytic ammoxidation hydrogen production electrode material (high in price and easy to poison and inactivate by adsorbing nitrogen atoms ). The electrocatalytic ammonia oxidation hydrogen production electrode material has a chemical formula of Cu2O-Ni (OH) 2 / NF, NF (foamed nickel is represented by NF) is used as a substrate, Ni (OH) 2 is in a nanosheet morphology, and Cu2O is in a nanowire morphology. According to the prepared three-dimensional structure with Cu2O nanowires braided and grown on Ni (OH) 2 nanosheets, a coating structure formed by braiding the Cu2O nanowires is beneficial to maintaining the physical and chemical structures of the Cu2O nanowires in the electrocatalysis process, and therefore the catalytic activity and stability of the electrode material are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to an electrocatalytic ammoxidation hydrogen production electrode material, a preparation method and an application thereof. Background technique [0002] Hydrogen energy is one of the most promising clean energy sources among many energy forms. It has the advantages of high combustion calorific value, clean combustion products, and wide sources. It is an ideal energy carrier for fuel cells. However, the high-density storage of hydrogen has been the main technical obstacle restricting the development of hydrogen energy economy. At present, the carbon fiber high-pressure hydrogen storage tank used in the most advanced Toyota fuel cell vehicle Mirai requires a pressure of 700bar to obtain a hydrogen energy density of 5.3GJ m -3 , has the disadvantages of high technical difficulty, high cost, large safety hazards, and low volumetric energy density. Ther...

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): B01J23/755C25B1/02C25B11/06
CPCB01J23/755C25B1/02C25B11/057C25B11/091B01J35/33
Inventor 王建辉黄静静蔡金孟
Owner WESTLAKE 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