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Preparation of non-noble metal/carbon composites based on metal-organic framework, non-noble metal/carbon composites and their applications

A metal-organic framework, carbon composite material technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of reducing the effective utilization of metals, reducing the reaction activity per unit mass of catalysts, etc., achieving low consumption of raw materials, suitable for mass production, The effect of broad market prospects

Active Publication Date: 2019-01-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of directly mixing non-noble metal compounds on the basis of MOF inevitably produces inactive agglomerated metal particles, which not only greatly reduces the effective utilization of metals, but also reduces the reactivity of the catalyst per unit mass.

Method used

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  • Preparation of non-noble metal/carbon composites based on metal-organic framework, non-noble metal/carbon composites and their applications
  • Preparation of non-noble metal/carbon composites based on metal-organic framework, non-noble metal/carbon composites and their applications
  • Preparation of non-noble metal/carbon composites based on metal-organic framework, non-noble metal/carbon composites and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of non-noble metal / carbon composite material based on the metal-organic framework of zinc / cobalt-benzimidazole (Zn / Co-BZIM), its preparation method comprises the following steps:

[0041] (1) Dissolve 4mmol of zinc nitrate and 1mmol of cobalt nitrate in 100mL of alcoholic solution (methanol:ethanol=1:1), and 20mmol of benzimidazole in 100mL of the same alcoholic solution. Mix the two solutions, stir at room temperature for 2 hours, and let stand at room temperature for 24 hours to obtain a blue-purple complex precipitate, then centrifuge three times at a speed of 8000r / min, wash three times with alcohol solution, and then dry at 60°C for 12 hours to obtain a blue-purple complex. Metal-organic framework complexes of zinc / cobalt-benzimidazole (Zn / Co-BZIM);

[0042] (2) Take 200mg of the above-mentioned Zn / Co-BZIM and put it in a porcelain boat, and take another 20mg of sublimed sulfur in a porcelain boat, put them into a sealed tube furnace respectively, and heat i...

Embodiment 2

[0047] A kind of non-noble metal / carbon composite material based on the metal-organic framework of zinc / cobalt-2-methylimidazole (Zn / Co-BZIF), its preparation method comprises the following steps:

[0048] (1) Dissolve 4.75mmol of zinc nitrate and 0.25mmol of cobalt nitrate in 100mL of methanol, and 20mmol of 2-methylimidazole in 100mL of the same methanol solution. After completely dissolving, mix the two solutions and stir at room temperature 6h, standing at room temperature for 24h, a blue-purple complex precipitate was obtained, centrifuged three times at a speed of 8000r / min, washed three times with methanol solution, and dried at 60°C for 12h to obtain a blue-purple zinc / cobalt-2-formazan Kimidazole (Zn / Co-BZIF) metal-organic framework complexes;

[0049] (2) Get 200mg of the above-mentioned Zn / Co-BZIF and place it in a sealable glass bottle, and put another 40mg of ferrocene in a small open bottle, and put the ferrocene (Fe(C 5 h 5 ) 2 ) was placed in a glass bottle ...

Embodiment 3

[0054] A kind of non-noble metal / carbon composite material based on the metal-organic framework of zinc-2-methylimidazole (ZIF-8), its preparation method comprises the following steps:

[0055] (1) Dissolve 5mmol of zinc nitrate in 100mL of methanol, 20mmol of 2-methylimidazole in 100mL of the same methanol solution, mix the two solutions after complete dissolution, stir at room temperature for 6h, and let stand at room temperature for 24h, The white complex precipitate was obtained, centrifuged three times at a speed of 8000r / min, washed three times with methanol solution, and dried at 60°C for 12 hours to obtain a white zinc-2-methylimidazole (ZIF-8) metal-organic framework complex thing;

[0056] (2) Get 200mg of the above-mentioned ZIF-8 and place it in a sealable glass bottle, and get another 40mg of ferrocene in a small open bottle, which will contain ferrocene (Fe(C 5 h 5 ) 2 ) was placed in a glass bottle with ZIF-8, sealed, placed in an oven, heated to 105°C, and k...

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Abstract

The invention discloses a preparation method of a non-noble metal / carbon composite material based on a metal-organic framework, comprising the following steps: (1) preparing a metal-organic frameworkcomplex; (2) placing the metal-organic frame complex obtained in the step (1), the non-noble metal compound and / or the heteroatom compound in an open container respectively, and placing the open container in a closed container for heat treatment to obtain a metal-organic frame complex composite material; (3) carbonizing the metal-organic framework complex composite material obtained in the step (2) in an inert atmosphere to obtain a non-noble metal / carbon composite material. The invention also correspondingly provides a non-noble metal / carbon composite material obtained by the preparation method and the application thereof. The preparation method of the invention can ensure the high dispersibility of the metal or the metal compound, greatly improves the utilization rate of the metal and has high catalytic activity.

Description

technical field [0001] The invention belongs to the field of energy and catalytic materials, and in particular relates to a non-precious metal / carbon composite material and its preparation method and application. Background technique [0002] The continuous consumption of traditional primary energy has brought problems to the sustainable development of resources and the environment. The development of clean energy is bound to be the trend of future energy development. Therefore, the development and utilization of new energy sources have attracted the attention of researchers. Among them, metal-air batteries and fuel cells have received extensive research and attention due to their advantages of non-toxicity, low cost, environmental protection, and high power density. The oxygen reduction reaction that occurs at the cathode of the battery is a key step that affects the coulombic efficiency and energy efficiency of the battery. The slow kinetics and high activation energy of...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/90H01M4/9041H01M4/9083Y02E60/50
Inventor 刘素琴叶冠英赵匡民袁修贵何震
Owner CENT SOUTH UNIV
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