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Method for preparing Pt-Cr/V alloy nano-sheet catalyst

A technology of alloy nano-catalysts, which is applied in the field of preparation of Pt-Cr/V alloy nano-sheet catalysts, can solve the problems of cumbersome preparation methods and other problems

Active Publication Date: 2012-06-20
KUSN INNOVATION INST OF NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the defect of complicated operation of the existing preparation method and provide a simple and convenient synthesis method with simple operation

Method used

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  • Method for preparing Pt-Cr/V alloy nano-sheet catalyst
  • Method for preparing Pt-Cr/V alloy nano-sheet catalyst
  • Method for preparing Pt-Cr/V alloy nano-sheet catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Preparation of Pt-Cr alloy nanosheet catalyst by microwave method, the steps are: (1) take 0.2mmol H 2 PtCl 6 5 ml of ethylene glycol solution, 0.1 mmol CrCl 3 Powder, 2.7mmol PVP and 0.5ml dodecanethiol were added to 50ml ethylene glycol and placed in a flat-bottomed flask; (2) then magnetically stirred at 35°C for 2h; (3) then placed in a microwave oven, and Under argon protection atmosphere, under 500W power, microwave for 5min, in which microwave for 40s per minute, and stop for 20s; (4) After the microwave is finished, after cooling, take out the flask, centrifuge the suspension at 6000 rpm, and then wash with ethanol and acetone mixture (volume ratio 1:1) and centrifuged to obtain the desired Pt-Cr alloy catalyst.

Embodiment 2

[0020] Preparation of Pt-Cr alloy nanosheet catalyst by microwave method, the steps are: (1) take 0.4mmol H 2 PtCl 6 5 ml of ethylene glycol solution, 0.1 mmol CrCl 3 Powder, 3.0mmol PVP and 0.5ml dodecanethiol were added to 50ml ethylene glycol and placed in a flat-bottomed flask; (2) then magnetically stirred at 30°C for 3h; (3) then placed in a microwave oven, and Under argon protection atmosphere, under 500W power, microwave for 5min, in which microwave for 40s per minute, and stop for 20s; (4) After the microwave is finished, after cooling, take out the flask, centrifuge the suspension at 6000 rpm, and then wash with ethanol and acetone mixture (volume ratio 2.5:1) and centrifuged to obtain the desired Pt-Cr alloy catalyst.

Embodiment 3

[0022] Microwave method to prepare Pt-V alloy catalyst, the steps are: (1) take 0.1 mmol H 2 PtCl 6 5 ml of ethylene glycol solution, 0.1 mmol VCl 3 Powder, 2.2mmol PVP and 0.45ml dodecanethiol were added to 50ml ethylene glycol and placed in a flat-bottomed flask; (2) then magnetically stirred at 30°C for 4h; (3) then placed in a microwave oven, and Under argon protection atmosphere, under 500W power, microwave for 5min, in which microwave for 45s per minute, and stop for 15s; (4) After the microwave is finished, after cooling, take out the flask, centrifuge the suspension at 6000 rpm, and then wash with ethanol and acetone mixture (volume ratio 4:1) and centrifuged to obtain the desired Pt-V alloy catalyst.

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Abstract

A method for preparing a Pt-Cr / V alloy nano-sheet catalyst comprises the following steps: (1) adding selected Pt and Cr or Pt and V precursor into a solvent, and adding an active agent and a reducing agent; (2) stirring while heating to fully dissolve and disperse the precursor; (3) intermittently irradiating with microwave in the presence of Ar protection gas for full reaction; (4) filtering, and washing the filter cake to obtain the desired Pt-Cr / V alloy nano-sheet catalyst. The preparation method has the advantages of high convenience and high efficiency, and can reach high temperature in short time by microwave to fully reduce the Cr and V precursor which is hard to be reduced. In addition, the invention provides two different reaction systems, which can synthesize the desired alloy catalyst with the action of microwave.

Description

technical field [0001] The invention relates to a preparation method of a Pt-Cr / V alloy nanosheet catalyst, which belongs to the field of fuel cell catalyst synthesis and application. Background technique [0002] Alloy catalysts have been widely studied and applied as a research direction of catalysts, mainly focusing on noble metal alloy catalysts and alloy catalysts of noble metals and first transition metals (where the noble metals are mainly Pt), but for Pt and Cr or Pt The research on the alloy catalyst with V is less, and the research on the morphology of Pt-Cr / V alloy catalyst is even less. Previously, the synthesis of Pt alloy catalysts was mainly completed by heating in an oil bath in a high-pressure aqueous solution phase or an organic phase system. The process was cumbersome and the experiment took a long time. As a fast catalyst preparation method, the microwave method is often used in the preparation of catalysts, but the microwave method has certain requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652B01J35/02B01J37/34B01J35/00
Inventor 雷一杰顾军邹志刚
Owner KUSN INNOVATION INST OF NANJING UNIV