Preparation method of low-cost and high-activity trimetal nanocomposite electrode

A nanocomposite material and composite material technology are applied in the field of electrode preparation of high-activity three-metal nanocomposite materials, which can solve the problems of low metal utilization rate, and achieve the effects of low price, obvious catalytic effect and high peak current density.

Active Publication Date: 2018-04-13
CHANGZHOU UNIV
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  • Abstract
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  • 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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  • Preparation method of low-cost and high-activity trimetal nanocomposite electrode
  • Preparation method of low-cost and high-activity trimetal nanocomposite electrode
  • Preparation method of low-cost and high-activity trimetal nanocomposite electrode

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Embodiment 1

[0025] (1)Pt 1 Ag 2 / carbon black electrode preparation. Take 1.7 mg of carbon black and put it into 18 mL of twice distilled water, and ultrasonically oscillate it for 40 minutes to obtain a carbon black suspension. Then add 2 mL containing 0.8 mM H 2 PtCl 6 , a drop of ammonia and 1.7mM AgNO 3 The mixed solution was continued to be ultrasonically oscillated for 20 minutes to obtain 20mL containing AgNO 3 and H 2 PtCl 6 and suspensions of carbon black. Add 1 mL of 0.1M NaBH to the above suspension under magnetic stirring 4 The solution was stirred for 40 minutes, and then the sample was transferred to a test tube and allowed to settle for 10 hours. After the layers were separated, remove the supernatant, then add 10 μL of Nafion with a mass fraction of 5%, and ultrasonicate for 5 minutes to obtain 0.5 mL of black ink-like Pt 1 Ag 2 / carbon black suspension. Then pipette 5 μL of the above Pt 1 Ag 2 / carbon black suspension coated on the surface of a glassy car...

Embodiment 2

[0029] On the basis of Example 1, prepare Pd 0.01 / Pt 1 Ag 2 / carbon black electrode.

[0030] (1)Pt 1 Ag 2 / carbon black electrode preparation. Same as the step of (1) in Example 1;

[0031] (2) Pd modified Pt 1 Ag 2 / carbon black electrode. The same step as (2) in Example 1, but the Pd deposition time is 1 second. According to the amount of charge during the deposition process, the amount of Pd deposited was calculated to be about 0.13 μg cm -2 , making Pd 0.01 / Pt 1 Ag 2 / carbon black electrode.

[0032] (3) Pd 0.01 / Pt 1 Ag 2 / 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 Pd 0.01 / Pt 1 Ag 2 / carbon black electrode, the results are 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 in particular relates to a preparation method of a low-cost high-activity tri-metal nanocomposite electrode. Background technique [0002] At present, the environment and energy have attracted much attention, and fuel cells have gradually become a hot spot in energy research. Among them, the research on direct methanol fuel cells is a direction of attention, but direct methanol fuel cells have some shortcomings and shortcomings, such as: toxic, volatile, to 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 the oxidation of alcohols are platinum (Pt) and platinu...

Claims

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Application Information

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Patent Type & Authority Applications(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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