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Preparation method and application of nitrogen and phosphorus co-doped carbon nanosheets

A technology of carbon nanosheets and co-doping, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of unfavorable large-scale application, poor stability, high price, etc., and achieve good durability Effects of Methanol Performance, High Stability, and High Current Density

Active Publication Date: 2018-04-24
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these metal catalysts have disadvantages such as high price and poor stability, which are not conducive to large-scale commercial application.

Method used

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  • Preparation method and application of nitrogen and phosphorus co-doped carbon nanosheets
  • Preparation method and application of nitrogen and phosphorus co-doped carbon nanosheets
  • Preparation method and application of nitrogen and phosphorus co-doped carbon nanosheets

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of nitrogen and phosphorus co-doped carbon nanosheets, comprising the following steps:

[0031] 1) Preparation of self-assembled melamine precursor: Weigh 6mmol melamine and add it to 10ml deionized water, stir evenly, add 910uL phytic acid dropwise, stir fully and stand still to obtain a white hydrogel, freeze-dry the product to obtain a white fluffy powder.

[0032] 2) Preparation of nitrogen-phosphorus co-doped carbon nanosheet material (N-P / CNS): put the self-assembled melamine precursor prepared in step 1) into a tube furnace, -1 The heating rate was raised to 700-1100°C and roasted for 2 hours to prepare nitrogen-phosphorus co-doped carbon nanosheets named N-P / CNS-700~N-P / CNS-1100, respectively.

Embodiment 2

[0034] A preparation method of nitrogen and phosphorus co-doped carbon nanosheets, comprising the following steps:

[0035] 1) Preparation of self-assembled melamine precursor: weigh melamine and add it to deionized water, stir evenly, add phytic acid dropwise, stir fully and stand still to obtain a white hydrogel, and freeze-dry the product to obtain a white fluffy powder. Wherein, the molar ratio of the melamine, phytic acid and water is 6:1:500.

[0036] 2) Preparation of nitrogen-phosphorus co-doped carbon nanosheet material (N-P / CNS): put the self-assembled melamine precursor prepared in step 1) into a tube furnace, -1 The heating rate was increased to 1000°C for 1.5h to prepare nitrogen and phosphorus co-doped carbon nanosheets.

Embodiment 3

[0038] A preparation method of nitrogen and phosphorus co-doped carbon nanosheets, comprising the following steps:

[0039] 1) Preparation of self-assembled melamine precursor: weigh melamine and add it to deionized water, stir evenly, add phytic acid dropwise, stir fully and stand still to obtain a white hydrogel, and freeze-dry the product to obtain a white fluffy powder. Wherein, the molar ratio of the melamine, phytic acid and water is 6:3:600.

[0040] 2) Preparation of nitrogen-phosphorus co-doped carbon nanosheet material (N-P / CNS): put the self-assembled melamine precursor prepared in step 1) into a tube furnace, -1 The heating rate was increased to 700°C for 2.5h to prepare nitrogen and phosphorus co-doped carbon nanosheets.

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Abstract

The invention discloses a preparation method of a nitrogen-phosphorus co-doped carbon nanosheet and application of the preparation method.Nitrogen-phosphorus co-doped carbon nanosheet catalyst material is prepared by: calcining at high temperature, template-free one-step self-assembled precursors: melamine and phytic acid.Oxygen reduction tests show that prepared N-P / CNS-1000 shows corrected initial potential and higher current density, represents four-electron transfer reaction, can match with commercial Pt / C and shows both excellent ethanol resistance and long-range stability in alkali solutions.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a preparation method and application of nitrogen and phosphorus co-doped carbon nanosheets. Background technique [0002] Most of the oxygen reduction catalysts widely used in fuel cells are platinum-based noble metal or non-noble metal catalysts. Most of these metal catalysts have disadvantages such as high price and poor stability, which are not conducive to large-scale commercial application. Therefore, the development of inexpensive metal-free catalysts with high activity and high stability is one of the goals of researchers. Carbon nanomaterials are an ideal metal-free catalyst material because of their low cost, simple preparation, environmental friendliness, high activity and high stability, and easy modification. In recent years, a large number of documents have reported that the catalytic activity of carbon nanomaterials can be increased by means of hete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9083H01M8/1011Y02E60/50
Inventor 王宗花王晓涵夏建飞赵凯
Owner QINGDAO UNIV
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