Method for preparing novel carbon nano-fiber platinum catalyst

A technology of nano-carbon fiber and platinum catalyst, which is applied in the field of nano-composite materials and electrocatalysis, which can solve the problems of large raw materials, waste, and environmental pollution, and achieve the effects of fast response, avoiding environmental pollution, and high efficiency

Inactive Publication Date: 2009-06-03
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the traditional method also has problems such as the use of reducing agents that pollute the environment or the waste of raw materials caused by low production efficiency, which limits its application in the field of electrocatalysis.

Method used

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  • Method for preparing novel carbon nano-fiber platinum catalyst
  • Method for preparing novel carbon nano-fiber platinum catalyst

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Experimental program
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Effect test

Embodiment 1

[0013] 1. Surface pretreatment of carbon nanofibers (provided by Showa Denko Co.Ltd. in Japan): 2.02g of carbon nanofibers were added to a three-necked flask, and 180ml of H 2 SO 4 , and then slowly drop 60ml of HNO 3 ; Put the three-necked flask into an oil bath at 60°C, and subject it to acid reflux for 5 hours; cool the three-necked flask with carbon nanofibers and mixed acid at room temperature; repeatedly filter and wash for 3 to 5 times until the pH value reaches neutral. Vacuum drying to obtain modified carbon nanofibers with good surface hydrophilicity.

[0014] 2. Nano-carbon fiber-supported platinum catalyst: weigh 60 mg of treated nano-carbon fiber and dissolve it in 75 ml of ethylene glycol (EG); ultrasonically disperse the EG solution with nano-carbon fiber for 2 hours; take 308ul of H 2 PtCl 6 Standard solution, made into 5ml of H 2 PtCl 6 -EG solution; the H 2 PtCl 6 -EG 5ml solution was transferred into ultrasonically dispersed carbon nanofibers-EG; heat...

Embodiment 2

[0016] 1. Surface pretreatment of carbon nanofibers (provided by Showa Denko Co.Ltd. in Japan): 1g of carbon nanofibers was added to a three-necked flask, and 90ml of H 2 SO 4 ; put the three-necked flask into an oil bath at 100°C, and subject it to acid reflux for 6 hours; cool the three-necked flask with nano-carbon fibers and strong acid at room temperature; repeatedly filter and wash for 3 to 5 times until the pH value reaches neutral. Vacuum drying to obtain modified carbon nanofibers with good surface hydrophilicity.

[0017] 2. Carbon nanofiber supported platinum catalyst: Weigh 80mg of treated nanocarbon fiber and dissolve it in 90ml propylene glycol; ultrasonically disperse the propylene glycol solution in which nanocarbon fiber is dissolved for 2h; take 350ul of H 2 PtCl 6 Standard solution, made into 5ml of H 2 PtCl 6 - propylene glycol solution; H 2 PtCl 6 - 5ml of propylene glycol solution was transferred into ultrasonically dispersed nano-carbon fiber-propy...

Embodiment 3

[0019] 1. Surface pretreatment of carbon nanofibers (provided by Showa Denko Co.Ltd. in Japan): 1g of carbon nanofibers was added to a three-necked flask, and 60ml of H 2 SO 4 , and then slowly drop 60ml of HNO 3 ;Put the three-necked flask in an 80°C oil bath, and subject it to acid reflux for 6 hours; cool the three-necked flask with carbon nanofibers and mixed acid at room temperature; repeatedly filter and wash for 3 to 5 times until the pH value reaches neutral. Vacuum drying to obtain modified carbon nanofibers with good surface hydrophilicity.

[0020] 2. Nano-carbon fiber supported platinum catalyst: Weigh 100mg of treated nano-carbon fiber and dissolve it in 90ml ethylene glycol; ultrasonically disperse the ethylene glycol solution with nano-carbon fiber dissolved in it for 2 hours; take 400ul of dinitrosodiammine platinum standard Solution, made into 5ml of dinitrosodiammine platinum-ethylene glycol solution; transfer 5ml of dinitrosodiammine platinum-ethylene glyc...

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Abstract

The invention relates to a method for preparing novel carbon nano-fiber platinum catalyst, belonging to the field of nano-composite and catalysis. The preparation method comprises the steps as follows: acid-mixing disposal is carried out on the surface of the carbon nano-fiber; a polar group is led in the surface of the carbon fiber so as to form a generation site for Pt nano-particle; furthermore, the method adopts a chemical reduction method of glycol to prepare composite of Pt/carbon nano-fiber with uniform distribution of particle; the particle size of the Pt nano-particle is 3-5nm and the content of Pt is 10-40wt%; the Pt is uniformly distributed on the surface of the carrier; the method has good application prospect on ion membrane electrolyzer or fuel cell, thus pushing the modernized industrial development.

Description

technical field [0001] The invention discloses a preparation method of a novel nano-carbon fiber-supported platinum catalyst, which belongs to the field of nano-composite materials and electrocatalysis. Background technique [0002] Due to their good catalytic properties, transition metal nanoparticles have broad application prospects in the field of chemical catalysis or electrochemical catalysis. However, metal nanoparticles are easy to agglomerate and difficult to disperse, which reduces their catalytic efficiency and affects the application of transition metal nanoparticles in the field of catalysis. So far, the method of loading nanoparticles on the surface of the carrier is mainly used to avoid agglomeration of nanoparticles and increase their specific surface area, thereby improving their catalytic efficiency. Usually, the carrier is silica powder, aluminum oxide powder, carbon black powder and powdery carrier. However, due to the fact that the carrier is mostly pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J21/18
Inventor 王峰闫冬升赵永彬刘景军王建军董明张良虎
Owner BEIJING UNIV OF CHEM TECH
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