Method for preparing Pt/C nanometer catalyst and device thereof

A technology of nano-catalyst and preparation device, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalyst, etc., to achieve the effects of convenient operation, large number of units, and simple structure

Active Publication Date: 2010-12-08
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has never been a report on the preparation of carbon-supported platinum nanocatalysts in electrochemical microfluidic reactors

Method used

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  • Method for preparing Pt/C nanometer catalyst and device thereof
  • Method for preparing Pt/C nanometer catalyst and device thereof
  • Method for preparing Pt/C nanometer catalyst and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: Design the preparation device of carbon-supported platinum nanocatalyst, establish the electrochemical microfluidic system, see figure 1 , the preparation device of the carbon-supported platinum nanocatalyst of the present invention is provided with advection pump 1, reactor 2, two platinum electrodes 3, electrochemical potentiostat 4 and product collection container 5, the input end of advection pump 1 is connected reaction The inlet of the liquid container 6, the output end of the advection pump 1 is connected to the input end of the reactor 2, the output end of the reactor 2 is connected to the product collection container 5, two platinum electrode pieces 3 are embedded in the reactor 2 in parallel, and the advection pump is connected through a pipeline 1. Make the reaction solution flow between the two platinum electrode sheets 3, and the two platinum electrode sheets 3 are respectively connected to the electrochemical potentiostat 4. The two platinum ...

Embodiment 2

[0027] Example 2: Two platinum electrode sheets are used as the working electrode and the counter electrode respectively, the square wave potential controls the tank pressure, the upper limit potential is 3.0V, the lower limit potential is 3.0V, the square wave frequency is 2Hz, and the carbon black solution flows continuously through the two platinum electrodes Between the sheets, the flow rate was 72 μL / min, the product was received at the outlet of the reactor, and centrifuged to obtain a carbon-supported platinum nanocatalyst with a particle size of about 100 nm. figure 2 is the SEM image of carbon-supported platinum nanocatalysts, by figure 2 It can be seen that the carbon-supported platinum nanocatalyst has a specific crystal shape.

Embodiment 3

[0028] Embodiment 3: Similar to the process of Example 2, but when preparing carbon-loaded high surface energy platinum nanocatalysts, using saturated calomel as the three-electrode system of the reference electrode, the upper limit potential of the square wave is 1.75V, and the lower limit potential is 0.80V, square wave frequency 10Hz, carbon black solution intermittently flowed between two platinum electrodes at a flow rate of 130 μL / min, and an interval of 60 minutes to prepare a carbon-supported platinum nanocatalyst with a particle size of about 15 nm. image 3 is the SEM image of carbon-supported platinum nanocatalysts, by image 3 It can be seen that the carbon-supported platinum nanocatalyst has a specific crystal shape.

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Abstract

A method for preparing a Pt / C nanometer catalyst and a device thereof relate to a catalyst and provide a method for preparing the Pt / C nanometer catalyst, the device thereof and the application of thePt / C nanometer catalyst in the fields of fuel cells, electrosynthesis and the like. The device for preparing the Pt / C nanometer catalyst is provided with an advection pump, a reactor, two electrodes,an electrochemical constant potential rectifier and a product collector; the input end of the advection pump is connected with an inlet for reaction liquid, while the output end thereof is connectedwith the input end of the reactor; the output end of the reactor is connected with the product collector; the two electrodes are embedded in the reactor; and the reaction liquid flows between the twoelectrodes which are respectively connected with the electrochemical constant potential rectifier. The distance between the two electrodes of the device for preparing the Pt / C nanometer catalyst is adjusted between 400 and 2000 mu m; square-wave potential processing is executed in running carbon carrier solution, namely, the flow rate of the carbon carrier solution is regulated, a square-wave potential regulation and control electric field is applied between the two electrodes, the product is received and separated, and then the Pt / C nanometer catalyst is obtained.

Description

technical field [0001] The invention relates to a catalyst, in particular to a method for continuously preparing carbon-supported platinum nano-catalysts in an electrochemical microflow reactor and a device thereof. Background technique [0002] Since the rise of microreactor technology in the 1990s, it has been widely used in the fields of liquid phase reaction, gas-liquid reaction, photochemistry and electrochemistry. There have been reports (referring to literature: J.Electrochem.Commun, 2005, 7:918-924; J.Electrochem.Commun.2005, 7: 35). Carbon-supported platinum nanocatalysts are platinum catalyst nanoparticles dispersed and supported on carbon particle carriers. They are widely used catalysts in important fields such as fuel cells and electrosynthesis, and have been intensively studied in the past 20 years. Further improving the performance of carbon-supported platinum nanocatalysts and realizing mass production of high-performance catalysts are key issues in this fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02B01J23/42C25D5/18C25D7/00C25D17/00H01M4/92
CPCY02E60/50
Inventor 孙世刚黄蕊陈声培
Owner XIAMEN UNIV
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