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Nitrogen-containing graphitized carbon material adopting double-metal MOFs (metal organic frameworks)

A graphitized carbon and bimetallic technology, applied in non-metallic elements, metal processing equipment, carbon preparation/purification, etc., can solve the problems of limited application of electrode materials, poor degree of graphitization, and low metal-nitrogen structure ratio, etc. Achieved the effect of excellent activity, excellent product performance and high specific surface area

Inactive Publication Date: 2017-11-28
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as far as the literature survey is concerned, the vast majority of MOFs-derived electrode materials are derived from a single MOFs. Although some porous carbon composites have a large specific surface area, the resulting metal-nitrogen structure often has a low proportion. Or the degree of graphitization is poor, which greatly limits the application of electrode materials

Method used

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  • Nitrogen-containing graphitized carbon material adopting double-metal MOFs (metal organic frameworks)
  • Nitrogen-containing graphitized carbon material adopting double-metal MOFs (metal organic frameworks)
  • Nitrogen-containing graphitized carbon material adopting double-metal MOFs (metal organic frameworks)

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Embodiment 1

[0027] Step 1: Weigh 3.7 g of 2-methylimidazole, stir and dissolve it in 80 mL of methanol at room temperature to form solution A. Weigh 1.233 g of cobalt nitrate hexahydrate and 0.42 g of zinc nitrate hexahydrate, stir and dissolve in 80 mL of methanol at room temperature to form solution B. Slowly pour B into A, stir for 5 min, and stand at room temperature for 24 h. The mixture is centrifuged at 10,000 rpm, washed with methanol three times, vacuum-dried at low temperature for 12 h, and vacuum-activated at 200°C for 24 h. A CoZn-ZIF precursor is obtained.

[0028] Step 2: Synthesis of Co-CNT@NC: Weigh 200 mg of CoZn-ZIF from Step 1 and put it into a tube furnace, heat it up to 900°C at a rate of 5°C / min under an argon atmosphere, and calcinate for 3 h, 35.5 mgCo-CNT@NC was obtained.

[0029] Step 3: Synthesis of P-Co-CNT@NC: Weigh 25 mg of Co-CNT@NC in Step 2 and 5 mg of triphenylphosphine in 10 mL of methanol and mix and stir for 24 h, then drain the methanol to obtain T...

Embodiment 2

[0031] Step 1: Weigh 3.7 g of 2-methylimidazole, stir and dissolve it in 80 mL of methanol at room temperature to form solution A. Weigh 0.822 g of cobalt nitrate hexahydrate and 0.84 g of zinc nitrate hexahydrate, stir and dissolve in 80 mL of methanol at room temperature to form solution B. Slowly pour B into A, stir for 5 min, and stand at room temperature for 24 h. The mixture is centrifuged at a speed of 10,000 rpm, washed with methanol for 3 times, vacuum-dried at low temperature for 12 h, and vacuum-activated at 200°C for 24 h. A CoZn-ZIF precursor is obtained.

[0032] Step 2: Synthesis of Co-CNT@NC: Weigh 200 mg of CoZn-ZIF from Step 1 and put it into a tube furnace, heat it up to 900°C at a rate of 5°C / min under an argon atmosphere, and calcinate for 3 h, 28.4 mgCo-CNT@NC was obtained.

[0033] Step 3: Synthesis of P-Co-CNT@NC: Weigh 25 mg of Co-CNT@NC in Step 2 and 5 mg of triphenylphosphine in 10 mL of methanol and mix and stir for 24 h, then drain the methanol t...

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Abstract

The invention provides a nitrogen-containing graphitized carbon material adopting double-metal MOFs (metal organic frameworks). The material is prepared with a method as follows: S1, 2-methylimidazole is dissolved to form a solution A, cobalt salt and zinc salt are mixed to form a solution B, the solution A and the solution B are mixed, left to stand, centrifugalized, washed and dried, and double-metal MOF precursors are obtained; S2, the double-metal MOF precursors formed in S1 are calcined in an inert gas atmosphere, and the calcined double-metal MOF precursors are obtained; S3, the calcined double-metal MOF precursors formed in S2 are mixed with triphenylphosphine or tributyl phosphate in a solution, the mixture is calcined in an inert gas atmosphere, washed and dried, and the nitrogen-containing graphitized carbon material adopting the double-metal MOFs is obtained. The invention provides a highly-graphitized porous carbon material which is high in specific surface area and hierarchically porous, realizes uniform nitrogen doping and contains rich metal-nitrogen structures, the activity of the product in oxygen evolution through water electrolysis is more excellent than that of commercial ruthenium oxide, and the material has great application prospects in energy storage materials.

Description

technical field [0001] The invention relates to the technical field of preparation of energy storage materials, and more specifically, relates to a nitrogen-containing graphitized carbon material of bimetallic MOFs. Background technique [0002] In recent years, energy storage has greatly promoted the application of portable electronic devices, and the design and preparation of counter electrode materials have emerged as the times require, which has become one of the research hotspots of scientists all over the world. Rational design of novel nanomaterials is urgently needed for modern improvements in energy storage. Electrochemical energy storage is one of the most promising approaches in energy storage, and the optimization of nanostructured electrodes in electrochemical energy storage requires a systematic approach to achieve maximum efficiency. Generally speaking, the use of nanoporous materials as electrode materials must have a considerable active specific surface are...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01B32/205B01J27/24C01B13/02B22F9/24B22F1/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B13/0207B01J27/24B22F9/24C01P2002/82C01P2004/03C01P2004/04C01P2006/40B22F1/0547B22F1/07B22F1/17
Inventor 李光琴李银乐贾保明朱克龙
Owner SUN YAT SEN UNIV
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