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Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst and preparation method thereof and application of Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst

A core-shell structure, porous carbon technology, applied in structural parts, electrical components, battery electrodes, etc.

Active Publication Date: 2020-02-07
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no literature and patent reports on the Co-N doped porous carbon-coated carbon nanotube core-shell catalyst based on the in-situ growth of ZIF-67 on carbon nanotubes and its electrocatalytic performance for ORR.

Method used

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  • Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst and preparation method thereof and application of Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst
  • Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst and preparation method thereof and application of Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst
  • Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst and preparation method thereof and application of Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst

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Embodiment

[0025] refer to figure 1 , a method for preparing a Co-N doped porous carbon-coated carbon nanotube core-shell structure catalyst, comprising the steps of:

[0026] 1) Add 4 mg of acidified MWCNTs (AO-MWCNTs) and 40-150 mg of PVP into a container containing 5 mL of methanol, and add 291 mg of Co(NO 3 ) 2 ·6H 2 O, continue to sonicate for 2 h and then centrifuge, add the sample separated by centrifugation into a container containing 10 mL of methanol, and add 10 mL of methanol solution of 2-methylimidazole after ultrasonic dispersion, in which, 2-methylimidazole 3-19 mmol, after standing for 12 h, centrifuge and dry to obtain ZIF-67 / MWCNTs composite material;

[0027] 2) Weigh 50 mg of the ZIF-67 / MWCNTs composite sample obtained in step 1), place it in a quartz tube furnace and heat-treat it at 500-1000°C for 3 h in an Ar atmosphere to obtain Co-N doped carbon-coated carbon The nanotube core-shell structure is CNTs@Co-N-C;

[0028] 3) Add 30 mg of CNTs@Co-N-C obtained in s...

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Abstract

The invention discloses a Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst and a preparation method thereof and application of a Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst. According to the method, ZIF-67 growing on MWCNTs in situ serves as a precursor, and a Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst (CNTs@Co-N-PC) can be prepared through simple pyrolysis and acid treatment steps. The method is simple and controllable in process condition and suitable for large-scale commercial production, and the prepared catalyst is excellent in performance and low in cost and has a good application prospect.

Description

technical field [0001] The invention relates to the fields of electrocatalysis and fuel cells, in particular to a Co-N doped porous carbon-coated carbon nanotube core-shell structure catalyst, a preparation method and application thereof. Background technique [0002] At present, the high cost and low electrocatalytic performance of fuel cell cathode oxygen reduction reaction (ORR) electrocatalysts are still the main factors hindering its large-scale commercial application. Catalysts remain a challenge. In recent years, non-noble transition metal-doped M-N-C catalysts have attracted extensive attention due to the abundant M-N active sites. Metal-organic frameworks (MOFs) are a new type of porous material composed of metals and organic ligands. Due to their adjustable nanoporous structure, well-dispersed metal sites, and excellent designability, they have been studied It is regarded as an ideal precursor for the preparation of M-N-C type ORR catalysts. Among them, the coba...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCH01M4/8652H01M4/9041H01M4/9083H01M4/88Y02E60/50
Inventor 樊友军王晓曲李佳蒋哲刘成周
Owner GUANGXI NORMAL UNIV
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