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Copper-based nano-catalyst as well as preparation method and application thereof

A nano-catalyst, copper-based technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of long-distance targets, poor stability, low catalyst activity, etc., to achieve catalytic performance improvement, preparation Simple process and excellent catalytic performance

Inactive Publication Date: 2020-01-17
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, most of the currently reported copper-containing oxygen reduction electrocatalysts have low catalyst activity and poor stability in alkaline environments, and are still far away from the goal of commercial application.

Method used

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  • Copper-based nano-catalyst as well as preparation method and application thereof
  • Copper-based nano-catalyst as well as preparation method and application thereof
  • Copper-based nano-catalyst as well as preparation method and application thereof

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preparation example Construction

[0029] The preparation method of the copper-based nano-catalyst provided by a typical embodiment of the present invention comprises the following steps:

[0030] Step 1, 2-methylimidazole and methanol are mixed and then stirred to form a homogeneous solution A.

[0031] In step 2, zinc nitrate hexahydrate, copper acetylacetonate and an organic solvent are mixed and then stirred to form a uniform solution B. Preferably, the organic solvent is methanol. The mass ratio of 2-methylimidazole, zinc nitrate hexahydrate, and copper acetylacetonate is preferably 1.314:1.190:(0.21-1.05), more preferably 1.314:1.190:0.628.

[0032] Step 3: Add solution A to solution B and stir thoroughly, then transfer the stirred solution to a polytetrafluoroethylene liner and place it in a blast drying oven for hydrothermal treatment. Preferably, the temperature of the hydrothermal treatment is 90-180 degrees centigrade for 1-24 hours.

[0033] In step 4, the product obtained in step 3 is centrifuge...

Embodiment 1

[0041] Add 2-methylimidazole (1.314 g) and methanol (15 mL) into flask A and stir with a magnetic stirrer to form a homogeneous solution A; add zinc nitrate hexahydrate (1.190 g) and copper acetylacetonate (0.628 g) into flask B and methanol (30 mL) with a magnetic stirrer to form a homogeneous solution B; slowly pour the solution A in the above flask A into the flask B, stir with a magnetic stirrer for 1 h, and then transfer the stirred solution into polytetrafluoroethylene The lining was placed in a blast drying oven for hydrothermal treatment at 120 °C for 4 h. The resulting product was centrifuged with methanol in a high-speed centrifuge, and the centrifuged product was placed in a vacuum drying oven at 60°C for 8 h; the vacuum-dried product was placed in a magnetic boat and kept at 800°C for 3 h under an argon atmosphere to form Subsequent treatment can directly use the copper-based nano-catalyst with catalytic performance. Applying it to the electrocatalytic oxygen redu...

Embodiment 2

[0043] Add 2-methylimidazole (1.314 g) and methanol (15 mL) into flask A and stir with a magnetic stirrer to form a homogeneous solution A; add zinc nitrate hexahydrate (1.190 g) and copper acetylacetonate (0.628 g) into flask B and methanol (30 mL) with a magnetic stirrer to form a homogeneous solution B; slowly pour the solution A in the above flask A into the flask B, stir with a magnetic stirrer for 1 h, and then transfer the stirred solution into polytetrafluoroethylene The lining was placed in a blast drying oven for hydrothermal treatment at 120 °C for 4 h. The resulting product was centrifuged with methanol at 8000 rpm for 5 minutes in a high-speed centrifuge, and the centrifuged product was placed in a vacuum drying oven at 60 degrees Celsius for 8 h; Raise the temperature to 900 degrees Celsius and keep it for 3 hours to form a copper-based nanocatalyst that can be used directly without subsequent treatment and has catalytic performance. Applying it to the electroca...

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Abstract

The invention relates to a copper-based nano-catalyst as well as a preparation method and application thereof. A copper-doped metal organic framework (ZIF-8) is used as a precursor; high-temperature pyrolysis is performed in an inert atmosphere to form a transition metal copper-based nanocluster catalyst which can be directly used without subsequent treatment; the grain size is in nano-scale and uniform in size, wherein copper exists in the form of clusters, the active center is completely exposed, the catalytic performance is substantially improved, good cycle stability and good methanol tolerance are provided, and the catalyst can be well suitable for fuel cells, metal-air cells and other various novel energy catalysis systems.

Description

technical field [0001] The invention relates to a transition metal copper nano-catalyst, in particular to a copper-based nano-catalyst used for fuel cell cathode oxygen reduction reaction and its preparation method and application. Background technique [0002] Traditional power generation technologies mainly rely on the massive consumption of fossil fuels, causing serious environmental pollution, which greatly affects human life and health. A fuel cell is a device that directly converts chemical energy into electrical energy. Compared with the principle of dry batteries used in daily life, it solves the problems of dry batteries with limited volume, fast consumption, short life, and difficulty in recycling. In principle, as long as the fuel and catalyst are supplied to the fuel cell to make the electrochemical reaction continue, it can continuously transmit electric energy to the outside. Because the fuel cell directly converts chemical energy into electrical energy withou...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8652H01M4/9041Y02E60/50
Inventor 胡章贵黄聪沈丽丽
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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