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

Polycrystalline copper nano material, and preparation method and application thereof

A nanomaterial and polycrystalline copper technology, applied in the field of polycrystalline copper nanomaterials and their preparation, can solve problems such as increased production cost and achieve the effect of stable performance

Pending Publication Date: 2022-01-11
UNIV OF SCI & TECH OF CHINA
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid products produced by electrocatalytic carbon monoxide reduction are usually mixed with electrolyte salts and must be purified before they can be put into industrial use, which further increases the production cost.

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
  • Polycrystalline copper nano material, and preparation method and application thereof
  • Polycrystalline copper nano material, and preparation method and application thereof
  • Polycrystalline copper nano material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] 1. Preparation of copper hydroxychloride precursor:

[0090] Dissolve 511mg of copper chloride dihydrate in 2mL of isopropanol to form a green solution. After the solid is completely dissolved, add 2mL of propylene oxide to the mixed solution to disperse evenly by ultrasonication. Then 0.2 mL of water was added to the above solution to disperse evenly, and then the aging step was continued at room temperature for 12 hours. After aging, the supernatant was removed, the solid product was washed with acetone, washed three times and then transferred to a vacuum oven for drying. After drying at room temperature for 24 hours, it was taken out and ground with a mortar to obtain a copper hydroxychloride precursor.

[0091] 2. Electrochemical in situ synthesis of polycrystalline copper nanomaterials

[0092] Take 10 mg of powdered precursor and dissolve it into a mixed solution composed of 0.5 mL ethanol and 0.5 mL water, add 50 μL of 5 wt% Nafion117 solution, and mix in an ult...

Embodiment 2

[0098] 1. Preparation of copper hydroxychloride precursor:

[0099] Dissolve 511mg of copper chloride dihydrate in 2mL of isopropanol to form a green solution. After the solid is completely dissolved, add 2mL of propylene oxide to the mixed solution to disperse evenly by ultrasonication. Then 0.2 mL of water was added to the above solution to disperse evenly, and then the aging step was continued at room temperature for 24 hours. After aging, the supernatant was removed, the solid product was washed with acetone, washed three times and then transferred to a vacuum oven for drying. After drying at room temperature for 24 hours, it was taken out and ground with a mortar to obtain a copper hydroxychloride precursor.

[0100] 2. Electrochemical in situ synthesis of polycrystalline copper nanomaterials

[0101] Take 10 mg of powdered precursor and dissolve it into a mixed solution composed of 0.5 mL ethanol and 0.5 mL water, add 50 μL of 5 wt% Nafion117 solution, and mix in an ult...

Embodiment 3

[0103] Catalytic performance test of polycrystalline nano-copper materials

[0104] The catalytic performance test of the carbon monoxide electroreduction reaction using the polycrystalline copper nanomaterial prepared in Example 1 of the present invention

[0105] 12 mg of the polycrystalline copper nanocatalyst prepared in Example 1 was mixed with 10 μL of perfluorosulfonic acid resin and 1 mL of isopropanol by ultrasonic, and then coated on a 2 cm × 2 cm carbon gas diffusion layer (GDL), and cut out 1 cm after drying. The carbon paper of × 2cm is as working electrode and with the potassium hydroxide (KOH) solution of 1M as electrolytic solution, measure the activity of the polycrystalline copper nano material that embodiment 1 makes as carbon monoxide electroreduction catalyst in flow electrolytic cell, in The electroreduction performance of carbon monoxide was tested in a flow electrolytic cell. The flow electrolytic cell used used a three-electrode system. The carbon pape...

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 a polycrystalline copper nano material. Grain boundaries exist on the surface and in the polycrystalline copper nano material. Under the action of a crystal boundary, the polycrystalline copper nano material has a lower CO* protonation energy barrier in the electrocatalytic carbon monoxide reduction process, and a reaction intermediate CHCHO* for generating acetic acid has lower formation energy, so that high-selectivity electrocatalytic reduction from carbon monoxide to acetic acid is realized. Experimental results show that by using the polycrystalline copper nano material provided by the invention as a catalyst, in a traditional gas diffusion electrode flow cell, the Faraday efficiency of acetic acid reaches 52%, and the maximum bias current density of acetic acid reaches 321 mA cm<->. According to a membrane electrode solid electrolyte battery provided by the invention, the performance of the catalyst is stable within continuous 140 hours under the current of 250 mA, the relative purity of the prepared acetic acid solution reaches 98%, and the membrane electrode solid electrolyte battery can be directly applied to commercialization.

Description

technical field [0001] The invention relates to the technical field of energy catalysis, in particular to a polycrystalline copper nano material and its preparation method and application. Background technique [0002] Carbon monoxide is an important part of carbon-chemistry, and has been widely used in industrial production as a chemical raw material and fuel. Electrocatalytic carbon monoxide conversion has broad application prospects in the future due to its relatively mild conversion conditions and the characteristics of converting difficult-to-storage electrical energy into relatively stable chemical energy. However, the current electrocatalytic carbon monoxide reduction still has a series of problems such as low product selectivity, low current density, and poor reaction stability. Compared with gas phase products, liquid products have more obvious advantages of high energy density, easy storage and distribution. However, the liquid products produced by electrocatalyt...

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): C30B29/02C30B28/04B82Y30/00B82Y40/00
CPCC30B29/02C30B28/04B82Y30/00B82Y40/00
Inventor 张梦露郑婷婷鲍骏曾杰
Owner UNIV OF SCI & TECH OF CHINA
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