Preparation method of metal organic framework derived Co embedded nitrogen-doped carbon nanotube modified mesoporous carbon supported platinum catalyst

A metal-organic framework, nitrogen-doped carbon technology, used in electrochemical generators, final product manufacturing, sustainable manufacturing/processing, etc., to solve problems such as nitrogen content reduction

Inactive Publication Date: 2020-09-25
XINJIANG UNIVERSITY
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Problems solved by technology

However, the nitrogen content inevitably decreases during pyrolysis of MOFs, which is the main obstacle for nitrogen-doped carbon materials derived from

Method used

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  • Preparation method of metal organic framework derived Co embedded nitrogen-doped carbon nanotube modified mesoporous carbon supported platinum catalyst
  • Preparation method of metal organic framework derived Co embedded nitrogen-doped carbon nanotube modified mesoporous carbon supported platinum catalyst
  • Preparation method of metal organic framework derived Co embedded nitrogen-doped carbon nanotube modified mesoporous carbon supported platinum catalyst

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Embodiment 1

[0018] 3.28 g of 2-methylimidazole and 2.49 g of cobalt nitrate hexahydrate were dissolved in 250 mL of methanol respectively, and then mixed and stirred for 24 h to obtain a purple solid product, which was washed with methanol and then dried in vacuum for 8 h to obtain ZIF-67, Then 150 mg of ZIF-67 was dispersed in 10 mL of aqueous solution, and slowly dropped into 20 mL of 0.06 mol L -1 Melamine solution was stirred for 3 h and then freeze-dried to obtain a ZIF-67 / melamine mixture. The synthesized ZIF-67 / melamine mixture was heated in a tube furnace at 2 °C min -1 The heating rate was increased to 800 °C in an Ar atmosphere for 4 h to obtain ZIF-67-derived Co intercalated nitrogen-doped carbon nanotube-modified mesoporous carbon. Add 0.04 g of ZIF-67 derived Co intercalated nitrogen-doped carbon nanotubes to modify mesoporous carbon in a round bottom flask, then add 25 mL of ethylene glycol, and add 1 mL of 0.05 mol·L -1 Chloroplatinic acid (H 2 PtCl 6 •6H 2 O) Ethylene...

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Abstract

The invention provides a preparation method of a metal organic framework (MOFs) derived Co embedded nitrogen doped carbon nanotube modified mesoporous carbon supported platinum catalyst (Pt/NCNTs (at)MC800-4). According to the method is characterized by taking ZIF-67 as a precursor and melamine as an external nitrogen source, preparing the Co-embedded nitrogen-doped carbon nanotube modified mesoporous carbon at proper temperature and time by a high-temperature calcination method, then taking the Co-embedded nitrogen-doped carbon nanotube modified mesoporous carbon as the carbon carrier, and taking the chloroplatinic acid as a platinum source and the ethylene glycol as a reducing agent, and adopting a hot reflux method to prepare the Pt-based composite catalyst Pt/NCNTs (at) MC800-4. The prepared composite catalyst has good methanol oxidation electrocatalytic activity, carbon monoxide poisoning resistance and stability, so that the catalyst has potential application prospects in the field of fuel cells.

Description

technical field [0001] The invention relates to a method for preparing a metal-organic framework-derived Co embedded nitrogen-doped carbon nanotube modified mesoporous carbon-supported platinum catalyst. Background technique [0002] With the increasing shortage of traditional fossil fuels and environmental degradation, the development and utilization of various energy conversion systems have also received great attention. Direct methanol fuel cells (DMFCs), which can directly convert chemical energy into electrical energy, have the advantages of low pollution emissions, fast start-up, and high energy density, and have been considered as a promising option for automobiles and portable electronic devices. So far, platinum (Pt)-based catalysts have been considered as the most important anode electrocatalysts in DMFCs due to their unique electronic properties. However, poor electrocatalytic stability and high cost are the main obstacles restricting the practical application of...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88H01M8/1011
CPCH01M4/8825H01M4/9041H01M4/9058H01M4/9083H01M8/1011Y02E60/50Y02P70/50
Inventor 王瑞英张洁
Owner XINJIANG UNIVERSITY
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