A low-cost and highly active three-metal nanocomposite electrode preparation method

A nano-composite material and composite material technology are applied in the field of electrode preparation of highly active three-metal nano-composite materials, which can solve the problems of low utilization rate of metals, and achieve the effects of low price, low peak potential, and easy trace control.

Active Publication Date: 2020-06-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved in the present invention is: Pt has higher catalytic activity to ethylene glycol oxidation reaction, but when Pt nano-particles are loaded with an appropriate carrier and used as a catalyst for alcohol oxidation reaction, the atoms on the surface of the nano-particles can be used as active sites , and the subsurface atoms are not available for active sites, so the metal utilization rate is very low

Method used

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  • A low-cost and highly active three-metal nanocomposite electrode preparation method
  • A low-cost and highly active three-metal nanocomposite electrode preparation method
  • A low-cost and highly active three-metal nanocomposite electrode preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1)Pt 1 Ag 2 / Carbon black electrode preparation. Take 1.7 mg of carbon black into 18 mL of double distilled water, and perform ultrasonic vibration on it for 40 minutes to obtain a carbon black suspension. Then add 2mL containing 0.8mM H 2 PtCl 6 , A drop of ammonia and 1.7mM AgNO 3 The mixed solution, continue ultrasonic vibration for 20 minutes to obtain 20mL containing AgNO 3 And H 2 PtCl 6 And a suspension of carbon black. Add 1mL 0.1M NaBH to the above suspension under magnetic stirring 4 Solution, continue to stir for 40 minutes, and then transfer the sample to a test tube and let it settle for 10 hours. After stratification, remove the supernatant, and then add 10μL of Nafion with a mass fraction of 5%, and ultrasonically treat for 5 minutes to obtain 0.5mL of black ink-like Pt 1 Ag 2 / Carbon black suspension. Then pipette 5μL of the above Pt 1 Ag 2 / Carbon black suspension is coated on the surface of a glassy carbon electrode with a diameter of 4mm and dried ...

Embodiment 2

[0028] On the basis of Example 1, prepare Pd 0.01 / Pt 1 Ag 2 / Carbon black electrode.

[0029] (1)Pt 1 Ag 2 / Carbon black electrode preparation. The steps are the same as in Example 1 (1);

[0030] (2) Pd modified Pt 1 Ag 2 / Carbon black electrode. The procedure is the same as in Example 1 (2), but the Pd deposition time is 1 second. According to the charge amount during the deposition process, the Pd deposition amount is calculated to be about 0.13μg·cm -2 , Pd 0.01 / Pt 1 Ag 2 / Carbon black electrode.

[0031] (3)Pd 0.01 / Pt 1 Ag 2 / Carbon black electrode catalytic activity for the oxidation of ethylene glycol in alkaline medium. The steps are the same as in Example 1 (3), but the working electrode is Pd 0.01 / Pt 1 Ag 2 / Carbon black electrode, the result is as figure 2 Shown. Pd 0.01 / Pt 1 Ag 2 / The peak potential of the ethylene glycol oxidation reaction on the carbon black electrode is -0.21V, and the peak current density is 36.8mA·cm -2 .

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Abstract

The invention belongs to the field of electrochemical electrodes, and relates to a preparation method of a low-cost and high-activity trimetal nanocomposite electrode. The preparation method comprisesthe steps that a Pt1Ag2-carbon black composite is prepared, the surface of a glassy carbon electrode is coated with the Pt1Ag2-carbon black composite, room-temperature drying is conducted, and a Pt1Ag2-carbon black electrode is obtained; and the Pt1Ag2-carbon black electrode is taken as a working electrode, Pd is reduced and deposited to the surfaces of Pt1Ag2 nanoparticles, the trace Pd-modifiedPt1Ag2-carbon black electrode is prepared, and the electrode has the high catalytic activity on an ethylene glycol oxidation reaction. The electrode prepared through the method has the advantages ofbeing high in catalytic activity and low in cost and has a good application prospect.

Description

Technical field [0001] The invention belongs to the field of electrochemical electrode materials, and specifically relates to a method for preparing a low-cost and high-activity three-metal nanocomposite electrode. Background technique [0002] At present, environment and energy have attracted much attention, and fuel cells have gradually become a hot spot in energy research. Among them, direct methanol fuel cell research is a focus of attention. However, direct methanol fuel cells have some shortcomings and shortcomings, such as: toxic, volatile, and The permeability of the exchange membrane is strong. Therefore, researchers continue to carry out research on methanol alternative fuels. Ethylene glycol is a potential substitute. It has the characteristics of low toxicity, high boiling point, high energy density and high reactivity, so it has attracted more and more attention. [0003] Commonly used catalysts for alcohol oxidation reactions are platinum (Pt) and platinum-based cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92B82Y30/00
CPCB82Y30/00H01M4/8828H01M4/8853H01M4/9041H01M4/9083H01M4/921H01M4/926Y02E60/50
Inventor 金长春万翠翠董如林
Owner CHANGZHOU UNIV
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