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Preparation method of non-noble metal catalyst used for oxygen reduction reaction

A non-precious metal catalyst technology, applied in the field of non-precious metal catalysts, can solve the problems of different, expensive, and restricting the industrialization and commercialization of fuel cells and metal-air batteries

Active Publication Date: 2014-10-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently widely used platinum-based noble metal catalysts are expensive, which largely restricts the industrialization and commercialization of fuel cells and metal-air batteries. Therefore, the research on non-noble metal catalysts has become a hot spot in related fields.
Publicly reported non-noble metal catalysts for oxygen reduction reactions usually contain carbon, nitrogen, and transition metals (iron, cobalt, etc.), but the carbon sources, nitrogen sources, and transition metal compounds used are different, and the preparation methods are also different.

Method used

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  • Preparation method of non-noble metal catalyst used for oxygen reduction reaction
  • Preparation method of non-noble metal catalyst used for oxygen reduction reaction
  • Preparation method of non-noble metal catalyst used for oxygen reduction reaction

Examples

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Effect test

Embodiment 1

[0029] Weigh 8g of ferric ammonium citrate, dissolve it in 15mL of aqueous solution containing 0.15g of graphene oxide, mix well and remove the solvent at 80°C; put the solid mixture in a quartz boat, and then put it into a tube equipped with a quartz tube In a furnace, under a nitrogen atmosphere, at 10°C min -1 Raise the temperature to 600°C, and keep it for 5 hours, take it out after cooling to room temperature. The obtained solid was dissolved in 0.1mol L -1 HClO 4 The solution was neutralized at 80° C. for 24 hours, filtered, washed and dried to obtain a graphene-carbon nanocage composite.

Embodiment 2

[0031] Weigh 8g of ferric ammonium citrate, dissolve it in 50mL of aqueous solution containing 0.3g of graphene oxide, mix well and remove the solvent by freeze-drying; put the solid mixture in a quartz boat, and then put it into a tube furnace equipped with a quartz tube in a nitrogen atmosphere at 15°C min -1 Raise the temperature to 1000°C, and keep it for 1 hour, take it out after cooling to room temperature. Dilute the obtained solid in 1mol L -1 h 2 SO 4 The solution was neutralized at 90° C. and treated for 12 hours, filtered, washed and dried to obtain a graphene-carbon nanocage composite material.

Embodiment 3

[0033] Weigh 8g of ferric ammonium citrate, dissolve it in 60mL of aqueous solution containing 0.6g of graphene oxide, mix well and remove the solvent at 80°C; put the solid mixture in a quartz boat, and then put it into a tube equipped with a quartz tube In a furnace, under a nitrogen atmosphere, at 5°C min -1 Raise the temperature to 800°C, and keep it for 2 hours, take it out after cooling to room temperature. Dilute the obtained solid in 2mol L -1 The HCl solution was neutralized at 70°C for 36 hours, filtered, washed and dried to obtain a graphene-carbon nanocage composite.

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Abstract

The invention discloses a preparation method of a graphene-hollow carbon nanocage composite material used for oxygen reduction reaction. The method includes: dissolving ammonium ferric citrate solid powder in a graphene oxide solution, and conducting heating or freeze drying to remove a fusing agent so as to obtain solid powder; placing the solid powder in a quartz boat, then placing the quartz boat into a quartz tube equipped tube furnace; introducing an inert gas of certain flow velocity, then raising the temperature to 600-1000DEG C, keeping the state for 1-5h, and then performing cooling to room temperature; treating the obtained solid in an acid solution under 60-100DEG C for 12-36h, and carrying out filtering, washing and drying, thus obtaining the graphene-hollow carbon nanocage composite material. The precursor employed by the method has a low price, the preparation process is simple and convenient, and can realize large-scale preparation.

Description

technical field [0001] The invention relates to a method for preparing a non-precious metal catalyst for oxygen reduction reaction by using ferric ammonium citrate and graphene oxide as precursors through heat treatment and acid treatment. Background technique [0002] Low-temperature polymer electrolyte membrane fuel cells and metal-air batteries have broad application prospects in electric vehicles and mobile power sources. Among them, the oxygen reduction reaction is an important factor affecting the battery performance. Currently widely used platinum-based noble metal catalysts are expensive, which largely restricts the industrialization and commercialization of fuel cells and metal-air batteries. Therefore, research on non-noble metal catalysts has become a hot spot in related fields. The reported non-noble metal catalysts for oxygen reduction reaction usually contain carbon, nitrogen and transition metals (iron, cobalt, etc.), but the carbon sources, nitrogen sources ...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J21/18
Inventor 包信和王静汪国雄谭大力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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