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Nitrogen-doped carbon microspheres/Pd composite catalyst, preparation method and application thereof

A composite catalyst, nitrogen-doped carbon technology, applied in fuel cell type half cells and primary cell type half cells, electrical components, battery electrodes, etc. Complex process and other problems, to achieve the effect of improving catalytic activity, low cost and simple process

Active Publication Date: 2018-12-07
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a nitrogen-doped carbon microsphere / Pd composite catalyst and its preparation method and application, which are used to solve the high preparation cost of redox electrocatalysts in the prior art, Zinc-air batteries cannot be commercialized due to complex process and low activity

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  • Nitrogen-doped carbon microspheres/Pd composite catalyst, preparation method and application thereof
  • Nitrogen-doped carbon microspheres/Pd composite catalyst, preparation method and application thereof
  • Nitrogen-doped carbon microspheres/Pd composite catalyst, preparation method and application thereof

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Embodiment 11

[0038] The preparation of embodiment 1 No. 1 catalyst

[0039] 1) Disperse 80mg of acidified Vulcan Carbon uniformly in 20mL of ultrapure water by ultrasonic to obtain carbon microsphere suspension;

[0040] 2) Add 2.6g of ammonium sulfate, 1.2g of ammonium persulfate, and 11mg of palladium nitrate into 60mL of ultrapure water, and stir electromagnetically to obtain a mixed solution;

[0041] 3) After uniformly mixing the carbon microsphere suspension and the mixed solution, transfer it to a 100mL hydrothermal kettle with a polytetrafluoroethylene liner, put it in an oven with a temperature of 140°C for 12 hours, and cool to At room temperature, the product was washed and dried to obtain a composite catalyst of palladium and carbon microspheres (referred to as No. 1 catalyst).

Embodiment 2

[0042] Preparation of No. 2 catalyst of embodiment 2

[0043] 1) Heat the acidified Vulcan Carbon in 30% NH3 / Ar atmosphere at a rate of 5°C / min to 300°C for 2h, with a gas flow rate of 200mL / min.

[0044] 2) Uniformly disperse 80 mg of Vulcan Carbon after heat treatment with ammonia gas into 20 mL of ultrapure water to obtain carbon microsphere suspension;

[0045] 3) Add 2.6g of ammonium sulfate, 1.2g of ammonium persulfate, and 11mg of palladium nitrate into 60mL of ultrapure water, and stir electromagnetically to obtain a mixed solution;

[0046] 4) After uniformly mixing the carbon microsphere suspension and the mixed solution, transfer it to a 100mL hydrothermal kettle with a polytetrafluoroethylene liner, put it in an oven with a temperature of 140°C for 12 hours, and cool to At room temperature, the product was washed and dried to obtain a composite catalyst of palladium and carbon microspheres (referred to as No. 2 catalyst).

Embodiment 3

[0047] Preparation of No. 3 catalyst of embodiment 3

[0048] 1) Heat the acidified Vulcan Carbon in 30% NH3 / Ar atmosphere at a rate of 5°C / min to 600°C for 2h, with a gas flow rate of 200mL / min.

[0049] 2) Uniformly disperse 80 mg of Vulcan Carbon after heat treatment with ammonia gas into 20 mL of ultrapure water to obtain carbon microsphere suspension;

[0050] 3) Add 2.6g of ammonium sulfate, 1.2g of ammonium persulfate, and 11mg of palladium nitrate into 60mL of ultrapure water, and stir electromagnetically to obtain a mixed solution;

[0051] 4) After uniformly mixing the carbon microsphere suspension and the mixed solution, transfer it to a 100mL hydrothermal kettle with a polytetrafluoroethylene liner, put it in an oven with a temperature of 140°C for 12 hours, and cool to At room temperature, the product was washed and dried to obtain a composite catalyst of palladium and carbon microspheres (referred to as No. 3 catalyst).

[0052] figure 1 Transmission electron mi...

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Abstract

A method for prepare a nitrogen-doped carbon microsphere / Pd composite catalyst comprises: adding carbon material into nitric acid solution, stirring, heating, heat preservation, cooling, filtering anddrying; (2) calcining the carbon material prepared in the step (1) at a temperature of 300-1000 DEG C under a protective gas atmosphere to obtain a black powder material; (3) mixing the black powdermaterial, water, ammonium sulfate, ammonium persulfate, and palladium nitrate obtained in the step (3) to prepare an aqueous solution, stirring, heating and keeping temperature, cooling, filtering, and drying. As that catalyst in the present application has high catalytic activity and good stability for oxygen reduction, the method is simple.

Description

technical field [0001] The invention relates to a nitrogen-doped carbon microsphere / Pd composite catalyst, a preparation method and application thereof. Background technique [0002] Zinc-air battery is a green and clean energy. Zinc-air batteries have many advantages such as large specific capacity, high theoretical energy density, abundant electrode material reserves, stable performance, low toxicity and no pollution, mature technology and high safety, and have become a development hotspot in the world's energy field today, showing a huge market. prospect. Zinc-air batteries are widely used in navigation lights, unmanned observation stations, radio relay stations, etc. because they can provide stable small current for a long time. Moreover, zinc-air batteries are used as mobile phone batteries, which are two-thirds cheaper than commonly used nickel-metal hydride batteries and lithium-ion batteries, and the talk time is longer. However, due to the lack of suitable air-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/90H01M4/9041H01M12/06
Inventor 钱婧武德坤李小鹏孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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