Heteroatom-doped carbon nanotube-loaded iron phosphide nanoparticle oxygen reduction catalyst and preparation method thereof

A carbon nanotube and nanoparticle technology, applied in the field of nanometer new material preparation, can solve the problems affecting the oxygen reduction catalytic performance of materials, increase the number of active sites, poor conductivity of transition metal compounds, etc., and achieve excellent oxygen reduction catalytic performance, application Environmentally friendly and efficient preparation

Active Publication Date: 2018-12-04
LINYI UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, transition metal compounds also have disadvantages as fuel cell catalysts: (1) transition metal compounds have poor conductivity and need to be loaded on a certain conductive carrier; (2) transition metal compounds need to be micronized to increase active sites quantity, thereby increasing the catalytic effect of the catalyst
The homogeneity of the micro-nano structure of the catalyst obtained by this method is poor, and the controllability of the chemical structure is poor, which affects the oxygen reduction catalytic performance of the material.

Method used

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  • Heteroatom-doped carbon nanotube-loaded iron phosphide nanoparticle oxygen reduction catalyst and preparation method thereof
  • Heteroatom-doped carbon nanotube-loaded iron phosphide nanoparticle oxygen reduction catalyst and preparation method thereof
  • Heteroatom-doped carbon nanotube-loaded iron phosphide nanoparticle oxygen reduction catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In this example, the preparation of an oxygen reduction catalyst supported by heteroatom-doped carbon nanotubes with iron phosphide nanoparticles is achieved through the following steps:

[0026] Step 1, weigh 0.5g of hexachlorocyclotriphosphazene and 1.1g of 4,4'-dihydroxydiphenyl sulfone into a single-necked flask containing 100mL of tetrahydrofuran, and make hexachlorocyclotriphosphazene Dissolve with 4,4'-dihydroxydiphenyl sulfone; slowly add 2mL triethylamine dropwise to the solution, keep the reaction temperature at 50°C, and react for 12h; after the reaction, centrifuge, wash with water, and dry to obtain white polyphosphine Nitrile nanotubes;

[0027] Step 2, weigh 0.1 g of ferrous chloride tetrahydrate and dissolve it in 1 mL of water. After fully dissolving, add the solution to 50 mL of the aqueous dispersion of polyphosphazene nanotubes with a concentration of 10 mg / mL; stir for 12 hours to make the polyphosphazene Nanotubes fully adsorb ferrous chloride tet...

Embodiment 2

[0030] In this example, the preparation of an oxygen reduction catalyst supported by heteroatom-doped carbon nanotubes with iron phosphide nanoparticles is achieved through the following steps:

[0031] Step 1, weigh 0.5g of hexachlorocyclotriphosphazene and dissolve in 50mL of tetrahydrofuran. After fully dissolving, add the solution dropwise to 1.1g of 4,4'-dihydroxydiphenyl Sulfone and 2 mL of pyridine in tetrahydrofuran solution; keep the reaction temperature at 40°C, and react for 12 hours; after the reaction, centrifuge, wash with water, and dry to obtain white polyphosphazene nanotubes;

[0032] Step 2, weigh 0.1 g of ferrous chloride tetrahydrate and dissolve it in 1 mL of water. After fully dissolving, add the solution to 50 mL of the aqueous dispersion of polyphosphazene nanotubes with a concentration of 10 mg / mL; stir for 12 hours to make the polyphosphazene Nanotubes fully adsorb ferrous chloride tetrahydrate; after the reaction, centrifuge, wash and dry to obtain ...

Embodiment 3

[0035] In this example, the preparation of an oxygen reduction catalyst supported by heteroatom-doped carbon nanotubes with iron phosphide nanoparticles is achieved through the following steps:

[0036] Step 1, weigh 0.5g of hexachlorocyclotriphosphazene and dissolve in 50mL of tetrahydrofuran. After fully dissolving, add the solution dropwise in an ultrasonic water bath at 40°C until 1.1g of 4,4'-dihydroxydiphenyl Sulfone and 2 mL of pyridine in tetrahydrofuran solution; keep the reaction temperature at 40°C, and react for 12 hours; after the reaction, centrifuge, wash with water, and dry to obtain white polyphosphazene nanotubes;

[0037] Step 2, weigh 0.1 g of iron acetate and dissolve it in 1 mL of ethanol. After fully dissolving, add the solution to 50 mL of the ethanol dispersion of polyphosphazene nanotubes with a concentration of 10 mg / mL; stir for 6 hours to make the polyphosphazene nanotubes fully Adsorb iron acetate; after the reaction, centrifuge, wash, and dry to ...

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Abstract

The invention belongs to the technical field of preparation of new nano materials, and relates to a heteroatom-doped carbon nanotube-loaded iron phosphide nanoparticle oxygen reduction catalyst. The nanocatalyst takes polyphosphazene nanotubes as a heteroatom-doped carbon nanotube precursor and an organic iron salt or inorganic iron salt as an iron element precursor. The iron element precursor isadsorbed by the polyphosphazene nanotubes, one-step high temperature carbonization is performed in an inert atmosphere, and the heteroatom-doped carbon nanotube-loaded iron phosphide nanoparticle composite material is obtained. The composite material has excellent oxygen reduction catalytic performance, the catalytic activity of the oxygen reduction catalyst is close to that of a commercial Pt/C catalyst, and the oxygen reduction catalyst is cheaper and easier to obtain; at the same time, the catalytic durability, the methanol toxicity resistance and other characteristics are better than thoseof the commercial Pt/C catalyst.

Description

Technical field: [0001] The invention belongs to the technical field of nano new material preparation, and relates to a nano oxygen reduction catalyst, in particular to an oxygen reduction catalyst with heteroatom-doped carbon nanotubes supporting iron phosphide nanoparticles and a preparation process thereof. Background technique: [0002] Electrochemical new energy devices such as fuel cells and metal-air batteries are characterized by cleanliness and high efficiency. In the current society, people's awareness of environmental protection is constantly increasing. At the same time, the rapid development of new energy vehicles and mobile electronic equipment has brought unprecedented development opportunities to new energy devices such as fuel cells and metal-air batteries. However, as an important part of the cathode of these electrochemical new energy devices, the insufficient activity of oxygen reduction catalysts limits the development of these new energy devices. Noble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B82Y30/00H01M4/90
CPCB01J27/1853B82Y30/00H01M4/9083Y02E60/50
Inventor 刘悦陈奎永崔亮刘敬权
Owner LINYI UNIVERSITY
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