Preparation method of high-activity electrode having precious-metal-modified surface of bimetal nanocomposite material

A technology of bimetallic nanocomposite materials is applied in the field of preparation of highly active electrodes on the surface of precious metal modified bimetallic nanocomposite materials, and achieves the effects of high catalytic activity, high peak current density and improved catalytic activity

Active Publication Date: 2018-04-20
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few research papers on gold as a modifying metal for surface modification of other metals
[0007] So far, the modification of heterometallic deposition on the surface of base metal nanoparticles mainly uses the modification of another metal on the surface of a base metal, and there is no report on the modification of heterometallic deposition on the surface of PtNi bimetallic nanocomposites.

Method used

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  • Preparation method of high-activity electrode having precious-metal-modified surface of bimetal nanocomposite material
  • Preparation method of high-activity electrode having precious-metal-modified surface of bimetal nanocomposite material
  • Preparation method of high-activity electrode having precious-metal-modified surface of bimetal nanocomposite material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Pt 1 Ni 3 / Carbon black electrode preparation. 1.2 mg of carbon black was taken into 19 mL of double distilled water, and ultrasonically treated for 20 minutes to obtain a black carbon black suspension. Then add 37.5μL of 0.1M Ni(NO 3 ) 2 solution and 12.5μL of 0.1MH 2 PtCl 6 solution, and continue to ultrasonically vibrate for 20 minutes to obtain a solution containing Ni(NO 3 ) 2 and H 2 PtCl 6 carbon black suspension. Add 1 mL of freshly prepared 0.1 M NaBH to the above liquid under magnetic stirring 4 solution and continued stirring for 40 minutes. After that, the sample was transferred to a test tube and left to settle for 12 hours. After layering, the supernatant was removed, and 10 μL of Nafion solution with a mass fraction of 5% was added, and ultrasonically treated for 5 minutes to obtain 0.5 mL of black ink-like Pt 1 Ni 3 / carbon black suspension. 0.3μm and 0.05μm Al were used successively 2 O 3 Glassy carbon electrodes with a diameter of...

Embodiment 2

[0032] On the basis of Example 1, Au was prepared 0.06 / Pt 1 Ni 3 / Carbon black electrodes.

[0033] (1) Pt 1 Ni 3 / Carbon black electrode preparation. It is the same as the procedure of (1) in Example 1.

[0034] (2)Au 0.06 / Pt 1 Ni 3 / Carbon black electrode preparation. The same procedure as (2) in Example 1, but the Au deposition time was 5 seconds. According to the amount of charge in the deposition process, the Au deposition amount is calculated to be about 1.19 μg cm -2 , to obtain Au 0.06 / Pt 1 Ni 3 / Carbon black electrodes.

[0035] (3)Au 0.06 / Pt 1 Ni 3 Catalytic activity of carbon black electrodes for ethylene glycol oxidation in alkaline media. The same steps as (3) in Example 1, but the working electrode is Au 0.06 / Pt 1 Ni 3 / carbon black electrode, cyclic voltammetry was performed, and the results were as follows figure 2 shown. Au 0.06 / Pt 1 Ni 3 The peak potential of ethylene glycol oxidation reaction on carbon black electrode is...

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Abstract

The invention belongs to the field of an electrochemical electrode material, and relates to a preparation method of a high-activity electrode having a trace-precious-metal-modified surface of a bimetal nanocomposite material. The preparation method comprises: taking chloroplatinic acid and nickel nitrate as raw materials, adopting a chemical reduction method to prepare Pt1Ni3 nanoparticles, loading the Pt1Ni3 nanoparticles on carbon black to obtain a Pt1Ni3/carbon black composite material, coating a glassy carbon electrode with the Pt1Ni3/carbon black composite material, drying the obtained product at the room temperature to obtain a Pt1Ni3/carbon black electrode, taking the Pt1Ni3/carbon black electrode as a working electrode, and in a chloroauric-acid-containing sulfuric acid solution, in a constant potential condition, reducing Au and depositing Au on the surface of Pt1Ni3 nanoparticles to prepare a trace-Au-modified Pt1Ni3/carbon black electrode, which has high catalytic activity to a glycol oxidation reaction in an alkaline medium. The prepared electrode has obvious advantage with respect to catalytic activity and cost, and has bright application prospects.

Description

technical field [0001] The invention belongs to the field of electrochemical electrode materials, and relates to a method for preparing a highly active electrode with a precious metal-modified surface of a bimetallic nanocomposite material. Background technique [0002] In recent years, polyols have received increasing attention as potential fuels for direct alcohol fuel cells. Ethylene glycol is the simplest polyol with a high chemical energy-to-electrical conversion rate, giving 10 electrons when fully oxidized. Many studies have shown that ethylene glycol is more suitable for fuel cell fuel than methanol, glycerol and other alcohols in alkaline medium. Based on these characteristics of ethylene glycol, the application of ethylene glycol electrocatalytic oxidation in the development of direct alcohol fuel cells has received much attention. Direct glycol fuel cells fabricated with proton exchange membranes show lower fuel permeability and higher energy density. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 金长春蔡楠董如林
Owner CHANGZHOU UNIV
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