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A kind of preparation method of highly active electrode with noble metal modified bimetallic nanocomposite surface

A bimetallic nanocomposite material technology, applied in the field of preparation of highly active electrodes on the surface of noble metal modified bimetallic nanocomposite materials, to achieve the effects of short deposition modification time, low initial potential and peak potential, and high peak current density

Active Publication Date: 2019-11-12
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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  • A kind of preparation method of highly active electrode with noble metal modified bimetallic nanocomposite surface
  • A kind of preparation method of highly active electrode with noble metal modified bimetallic nanocomposite surface
  • A kind of preparation method of highly active electrode with noble metal modified bimetallic nanocomposite surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1)Pt 1 Ni 3 / carbon black electrode preparation. Take 1.2 mg of carbon black and put it into 19 mL of twice-distilled water, and perform ultrasonic treatment on it for 20 minutes to obtain a black carbon black suspension. Then add 37.5μL 0.1M Ni(NO 3 ) 2 solution and 12.5 μL 0.1MH 2 PtCl 6 solution, continue ultrasonic vibration for 20 minutes, and obtain a solution containing Ni(NO 3 ) 2 and H 2 PtCl 6 carbon black suspension. Add 1 mL of freshly prepared 0.1M NaBH to the above liquid under magnetic stirring 4 The solution was stirred for 40 minutes. Afterwards, the sample was transferred to a test tube and left to settle for 12 hours. After the layers were separated, the supernatant was removed, and 10 μL of Nafion solution with a mass fraction of 5% was added, and ultrasonic treatment was performed for 5 minutes to obtain 0.5 mL of black ink-like Pt 1 Ni 3 / carbon black suspension. Successively use 0.3μm and 0.05μm Al 2 o 3 The glassy carbon electr...

Embodiment 2

[0032] On the basis of Example 1, prepare Au 0.06 / Pt 1 Ni 3 / carbon black electrode.

[0033] (1)Pt 1 Ni 3 / carbon black electrode preparation. Same as the step of (1) in Example 1.

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

[0035] (3) Au 0.06 / Pt 1 Ni 3 / Catalytic Activity of Carbon Black Electrode for Ethylene Glycol Oxidation in Alkaline Media. Same as the step of (3) in embodiment 1, but working electrode is Au 0.06 / Pt 1 Ni 3 / carbon black electrode, carry out cyclic voltammetry, its result is as follows figure 2 shown. Au 0.06 / Pt 1 Ni 3 / The peak potential of the ethylene glycol oxidation reaction on the carbon black electrode is –0.21V, and the peak cu...

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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 by modifying the surface of a bimetal nanocomposite material with noble metals. 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 energy conversion rate, and can give 10 electrons when completely oxidized. Many studies have shown that ethylene glycol is more suitable as a fuel for fuel cells than alcohols such as methanol and glycerol in an 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 been paid attention to. Direct ethylene glycol fuel cells fabricated with proton exchange membranes show lower fuel permeability ...

Claims

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Application Information

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