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Solvent-free template preparation method of porous carbon-coated nanometer metal particle

A technology of nano-metal particles and porous carbon, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of increasing the preparation cost of porous carbon-based materials, complex reaction process, and incompatible with green energy and other problems, to achieve the effect of improving limitations, high carbonization yield, and broad application prospects

Inactive Publication Date: 2019-04-02
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen that although these methods for preparing porous carbon and composites containing porous carbon can obtain target products, in the preparation process of these materials, a large amount of water and other organic solvents need to be consumed, and the reaction process is complicated, which undoubtedly increases It reduces the preparation cost of porous carbon-based materials, does not meet the requirements of green energy, and limits its wide application

Method used

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  • Solvent-free template preparation method of porous carbon-coated nanometer metal particle
  • Solvent-free template preparation method of porous carbon-coated nanometer metal particle

Examples

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Effect test

Embodiment 1

[0014] 1 g triblock polymer Pluronic F127, 0.22 g resorcinol, 0.4 g terephthalaldehyde, a certain amount of sodium sulfate (Na 2 SO 4 ) Grinding and mixing to form a viscous polymer, which is placed in a quartz boat at 100 degrees for 8 hours to heat and solidify, and then in a tube furnace in an inert atmosphere N 2 (100mL / min) at 600°C for 3 h (1°C / min heating rate). The obtained product is washed with water, dried and ground into powder in a mortar to obtain a porous carbon material.

Embodiment 2

[0016] 1 g triblock polymer Pluronic F127, 0.146 g cobalt nitrate (Co(NO 3 )·6H 2 O), 0.22 g resorcinol, and 0.4 g terephthalaldehyde were mixed, and the mixture was vigorously ground for 5 min to form a viscous polymer (adding a certain amount of sodium sulfate (Na 2 SO 4 )), ground and mixed, put it in a quartz boat at 100 degrees for 8 h to heat and solidify, and then in a tube furnace in an inert atmosphere N 2 (100 mL / min) at 600 °C for 3 h (1 °C / min heating rate). The powder was ground in a mortar, washed with water, and air-dried at 80°C for 6 hours to obtain porous carbon-coated cobalt nanoparticles (Co@C).

Embodiment 3

[0018] 1 g of triblock polymer Pluronic F127 was ground into powder in a mortar, 0.22 g of resorcinol was added, 0.4 g of terephthalaldehyde was added in three batches, and the mixture was vigorously ground for 5 min to form a viscous polymer (in A certain amount of sodium sulfate (Na 2 SO 4 ),, 0.3 g nickel chloride (NiCl 2 ·6H 2 O)), grind and mix, put it in a quartz boat at 100 degrees for 8 h to heat and solidify, then inert atmosphere N in a tube furnace 2 (100 mL / min) at 800 °C for 3 h (5 °C / min heating rate). The powder was ground in a mortar, washed with water, and air-dried at 80°C for 6 hours to obtain porous carbon-coated nickel nanoparticles (Ni@C).

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Abstract

The invention provides a solvent-free template preparation method of a porous carbon-coated nanometer metal particle. A relatively good effect is shown when the obtained material is used for electrocatalytic oxygen-reduction reaction (ORR). According to the method, inorganic salt and a segmented copolymer (a flexible-rigid template) is used as dual templates, a transition metal salt-containing phenolic resin precursor is obtained by solid-phase reaction, and the porous carbon-coated transition metal (monometal and bimetal) material is obtained after thermal treatment carbonization, washing anddrying. During the synthesis process, a pore structure of a composition can be effectively controlled due to an effect of the flexible-rigid template, so that the contact area of an electrocatalyst and an electrolyte is substantially expanded, and the transition metal nanoparticles are more uniform in distribution on a carbon carrier. The method is low in cost, low in pollution and simple in treatment process, the limitation of active electrocatalyst production in industry is improved to a great extent, doping modification of heteroatoms such as nitrogen, sulfur, phosphorus and boron is further performed, and the method has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic oxygen reduction reaction (ORR), and in particular relates to a preparation method of porous carbon-coated nano metal particle electrocatalyst. Background technique [0002] The growing demand for clean and sustainable energy is an important issue facing us today. The research and development of new energy storage devices with long life, low cost and environmental friendliness are favored, and fuel cells are one of them. In a fuel cell, fuel directly converts chemical energy into electrical energy through a chemical reaction with oxygen, involving two important reactions, the performance of which depends largely on the oxygen reduction reaction (ORR) at the cathode. ORR is a complex electron transfer process with slow kinetics, and the noble metal platinum is commercially used as a catalyst. However, platinum-based electrocatalysts are expensive and prone to carbon monoxide poisoning, w...

Claims

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Application Information

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IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9041H01M4/9083Y02E60/50
Inventor 李怡招陈子茜曹亚丽贾殿赠
Owner XINJIANG UNIVERSITY
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