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

Preparation method of high-activity electrode with two precious metals one-step modifying common metal nanocomposite surface

A nano-composite material and common metal technology, which is applied in the field of preparation of Au-Pt one-step modified Ni/graphene electrodes, can solve the problems of low electrocatalytic activity, and achieve the effects of high catalytic activity, simple modification method and obvious modification effect.

Active Publication Date: 2018-01-05
CHANGZHOU UNIV
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is: the electrocatalytic activity of nickel as a common metal to ethylene glycol oxidation reaction is very low

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 of high-activity electrode with two precious metals one-step modifying common metal nanocomposite surface
  • Preparation method of high-activity electrode with two precious metals one-step modifying common metal nanocomposite surface
  • Preparation method of high-activity electrode with two precious metals one-step modifying common metal nanocomposite surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Ni / graphene electrode preparation

[0027] Using the Hummers chemical oxidation method, graphite flakes were prepared into graphite oxide, then 2 mg of graphite oxide was placed in 20 mL of double distilled water, and it was subjected to ultrasonic vibration for 40 min to obtain a brown transparent graphene oxide solution, and then 85 μL of 0.1M Ni (NO 3 ) 2 , and continued ultrasonic oscillation for 20 minutes to obtain about 20mL containing Ni(NO 3 ) 2 and graphene oxide solution; add 40mg NaBH to the above liquid under magnetic stirring 4 , continue to stir for 1.5h, then transfer the sample to a test tube and let it settle for 10h. After the layers were separated, the supernatant was removed, and the residual liquid was ultrasonically treated for 5 min. The resulting 1 mL black ink liquid was a Ni / graphene suspension. Successively use 0.3μm and 0.05μm Al 2 o 3 The surface of the glassy carbon electrode with a diameter of 4 mm is polished by polishing powd...

Embodiment 2

[0033] On the basis of Example 1, prepare AuPt (2s) / Ni / graphene electrode.

[0034] (1) Ni / graphene electrode preparation. Same as step (1) in Example 1.

[0035] (2) Au-Pt one-step modified Ni / graphene electrode. Ni / graphene electrode is as working electrode, and Au-Pt deposition time is 2s, and other conditions are identical with step (2) in embodiment 1, prepares AuPt (2s) / Ni / graphene electrode. The amount of Au-Pt deposited according to the amount of charge in the deposition process is about 0.70 μg / cm 2 .

[0036] (3) AuPt (2s) Catalytic activity of / Ni / graphene electrode for ethylene glycol oxidation in alkaline media. Working electrode is AuPt (2s) / Ni / graphene electrode, other conditions are identical with step (3) in embodiment 1, and result is as follows figure 2 shown. AuPt (2s) The peak potential of the ethylene glycol oxidation reaction on the / Ni / graphene electrode is -0.19V, and the peak current density is 21.7mA / cm 2 .

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 belongs to the field of electrochemical electrode materials and especially relates to a preparation method of a high-activity electrode with two precious metals one-step modifying commonmetal nanocomposite surface. The preparation method comprises the following steps: firstly preparing a Ni / graphene composite material and coating the surface of a processed glassy carbon electrode with the Ni / graphene composite material, and drying at room temperature to obtain an Ni / graphene electrode; then using the Ni / graphene electrode as a working electrode, using a Pt plate as a counter electrode, using a saturated calomel electrode as a reference electrode, depositing Au and Pt through one-step reduction onto the surface of graphene-loaded Ni nanoparticles in an acid solution of a precursor containing Au and Pt under the condition of constant potential so as to prepare an AuPt / Ni / graphene electrode with two precious metals one-step modifying common metal nanocomposite. The electrode has high catalytic activity to a glycol oxidation reaction in an alkaline medium. The prepared electrode of the invention has remarkable advantages in both aspects of catalytic activity and cost, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of electrochemical electrode materials, in particular to a preparation method of Au-Pt one-step modified Ni / graphene electrode. Background technique [0002] Alcohol fuel cell is a kind of electrochemical power source for mobile, stationary and portable, which has broad application prospects. Researchers have conducted extensive research on methanol fuel cells and made great progress. However, methanol has disadvantages such as toxicity, low boiling point, and easy permeation of separation membranes. Therefore, research on finding alternative fuels for methanol has been continuously carried out. Ethanol and ethylene glycol are the most potential substitutes. Ethylene glycol has attracted more and more attention because of its low toxicity, high boiling point, high energy density and high reactivity. [0003] The electrocatalytic oxidation of alcohols is carried out in acidic and basic media. Under acidic medium con...

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 Applications(China)
IPC IPC(8): G01N27/30
Inventor 金长春蔡楠董如林
Owner CHANGZHOU 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