Fuel cell negative electrode catalyst and preparation method and application thereof

A fuel cell cathode and catalyst technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve the problems of time and energy consumption, high price, poor stability, etc., and achieve good methanol resistance and Stability, good catalytic performance, short time-consuming effect

Active Publication Date: 2019-03-08
QINGDAO UNIV
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Problems solved by technology

Wherein noble metal catalyst mainly includes platinum, palladium etc., shortcoming is that price is more expensive; Non-noble metal catalyst mainly includes iron, cobalt etc., shortcoming is that stability is relatively poor; Applicant relates to a kind of nonmetallic porous carbon catalyst in CN 108281679 A before Although this nitrogen-doped carbide has good stability, it has certain shortcomings in catalytic performance. In addition, when removing water molecules or unreacted ligands remaining in the pores, it takes a long time (5± 0.5h) boiled, time-consuming and energy-consuming, further limiting its commercial large-scale use

Method used

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  • Fuel cell negative electrode catalyst and preparation method and application thereof
  • Fuel cell negative electrode catalyst and preparation method and application thereof
  • Fuel cell negative electrode catalyst and preparation method and application thereof

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preparation example Construction

[0029] As introduced in the background technology, there are certain deficiencies in the catalytic performance of non-metallic catalysts in CN 108281679 A. In order to solve the above technical problems, the present disclosure proposes a method for preparing a fuel cell cathode catalyst, which includes the following steps:

[0030] Using 2-amino-terephthalic acid and iron salt as raw materials, the metal iron-organic framework material was prepared by solvothermal synthesis, and the metal iron-organic framework material was washed in N,N-dimethylformamide and filtered , drying the filtered precipitate to obtain a precursor, calcining the precursor at 550-650° C. under an inert gas atmosphere, and then performing acid treatment to obtain iron-nitrogen-doped carbon nanomaterials. Wherein, the solvent used in the solvothermal synthesis method is N,N-dimethylformamide.

[0031] Different solvents were used in the solvothermal reaction to obtain different crystal morphologies. The...

Embodiment 1

[0052] A preparation method for nitrogen-iron-doped carbon nanomaterials, comprising the following steps:

[0053] 1) Preparation of nanoscale metallic iron-organic framework material precursor: weigh 1.3838mmol 2-amino-1,4-terephthalic acid, and simultaneously weigh 1.3838mmol ferric chloride hexahydrate and dissolve it in 30mL N,N-di Methylformamide, stirred until fully dissolved, then added to a polytetrafluoroethylene reactor, sealed the reactor, reacted at 120°C for 20 hours, then cooled to room temperature, filtered the above reaction solution, and filtered the precipitate with N, N-dimethylformamide was washed three times, and then dried in a vacuum oven for 12 hours to obtain a brown-black powder product.

[0054] 2) Preparation of nitrogen-iron-doped carbon nanomaterials (N-C-Fe): put the nanoscale metallic iron-organic framework material precursor prepared in step 1) into a tube furnace, -1 The temperature was raised to 600 ° C at a certain rate, and the nitrogen-ir...

Embodiment 2

[0056] This example is the same as Example 1, the difference is that this example is heated at 3°C·min under an argon atmosphere. -1 The temperature was raised to 550 ° C at a certain rate, and the nitrogen-iron-doped carbon nanomaterial was obtained by roasting for 3 hours, and then treated with 2M hydrochloric acid, and the obtained material was named N-C-Fe-550.

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Abstract

The invention relates to a fuel cell negative electrode catalyst and preparation method and application thereof. The preparation method comprises the steps of taking 2-amino-terephthalic acid and an iron salt as raw materials, preparing a metal iron-organic framework material by a solvothermal synthesis method, performing filtering after the metal iron-organic framework material is washed by N, N-dimethylformamide, drying the filtered precipitant to obtain a precursor, roasting the precursor under an inert gas atmosphere at 550-650 DEG C, and performing acid treatment, thereby obtaining a nitrogen- and iron-doped carbon nanometer material, wherein the solvent employed by the solvothermal synthesis method is N, N-dimethylformamide organic solvent. The nitrogen- and iron-doped carbon nanometer material prepared by the method has excellent oxygen-reduction catalytic activity, relatively good take-off potential and limited current and stable methyl alcohol-resistant performance, and the electron transfer number approaches to four electron transfer paths.

Description

technical field [0001] The disclosure belongs to the technical field of fuel cells, and in particular relates to a fuel cell cathode catalyst and its preparation method and application. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In view of people's increasing energy needs, emerging energy conversion devices have become a research hotspot. For example, new electrochemical energy conversion devices have shown great application prospects for meeting people's increasing energy demand. Regarding the existing research on fuel cells, the oxygen reduction catalysts of fuel cells include noble metal catalysts, non-noble metal catalysts and carbon-based non-metal catalysts. Wherein noble metal catalyst mainly includes platinum, palladium etc., shortcoming is that price is more expensive; Non-noble metal catalyst mainly includes iron, cobalt etc., sh...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90B82Y30/00
CPCB82Y30/00H01M4/8825H01M4/90H01M4/9041Y02E60/50
Inventor 周瑜王宗花张艳
Owner QINGDAO UNIV
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