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Cobalt metaphosphate/nitrogen carbon oxygen reduction catalyst and preparation method and application thereof

A cobalt metaphosphate and catalyst technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low initial potential and half-wave potential, and achieve a simple method, cheap and easily available raw materials, and promotion of electrocatalytic activity. Effect

Active Publication Date: 2022-07-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing transition metal metaphosphate as the synthesis step of fuel cell oxygen reduction catalyst, low initial potential and half-wave potential, and provide a "guniang" type nitrogen-doped carbon-coated Cobalt oxygen reduction catalyst and preparation method of metaphosphate

Method used

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  • Cobalt metaphosphate/nitrogen carbon oxygen reduction catalyst and preparation method and application thereof
  • Cobalt metaphosphate/nitrogen carbon oxygen reduction catalyst and preparation method and application thereof
  • Cobalt metaphosphate/nitrogen carbon oxygen reduction catalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Accurately weigh 582.10 mg Co(NO 3 ) 2 ·6H 2 The O solid was dissolved in 20 mL of methanol solution, then sonicated and magnetically stirred until a clear pink solution of cobalt nitrate in methanol was obtained.

[0028] (2) 2 mL of ATMP aqueous solution with a mass concentration of 50 wt.% was slowly added dropwise to the above cobalt nitrate methanol solution, reacted for 15 minutes to obtain a mixed solution, and then centrifuged, washed, and dried to obtain pink cobalt metaphosphate. Coordination polymer precursors.

[0029] (3) The cobalt metaphosphate coordination polymer precursor formed in step 2 was placed in a tube furnace, and calcined at 700 °C for 1 h under a protective gas atmosphere to obtain a cobalt metaphosphate / nitrogen carbon oxygen reduction catalyst.

[0030] figure 1 According to the X-ray diffraction pattern of the product obtained in Example 1 of the present invention, all X-ray powder diffraction peaks can be indexed as Co(PO 3 ) 2 ...

Embodiment 2

[0032] (1) Accurately weigh 1164.2 mg Co(NO 3 ) 2 ·6H 2 The O solid was dissolved in 20 mL of methanol solution, then sonicated and magnetically stirred until a clear pink solution of cobalt nitrate in methanol was obtained.

[0033] (2) 2 mL of ATMP aqueous solution with a mass concentration of 55 wt.% was slowly added dropwise to the above cobalt nitrate methanol solution, reacted for 30 minutes to obtain a mixed solution, and then centrifuged, washed, and dried to obtain pink cobalt metaphosphate. Coordination polymer precursors.

[0034] (3) The cobalt metaphosphate coordination polymer precursor formed in step 2 was placed in a tube furnace, and calcined at 800 °C for 1 h in a protective gas atmosphere to obtain a cobalt metaphosphate / nitrogen carbon oxygen reduction catalyst.

Embodiment 3

[0036](1) Accurately weigh 1746.18 mg Co(NO 3 ) 2 ·6H 2 The O solid was dissolved in 20 mL of methanol solution, then sonicated and magnetically stirred until a clear pink solution of cobalt nitrate in methanol was obtained.

[0037] (2) 2 mL of ATMP aqueous solution with a mass concentration of 60 wt.% was slowly added dropwise to the above cobalt nitrate methanol solution, reacted for 60 minutes to obtain a mixed solution, and then centrifuged, washed, and dried to obtain pink cobalt metaphosphate. Coordination polymer precursors.

[0038] (3) The cobalt metaphosphate coordination polymer precursor formed in step 2 was placed in a tube furnace, and calcined at 900 °C for 2 h under a protective gas atmosphere to obtain a cobalt metaphosphate / nitrogen carbon oxygen reduction catalyst.

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Abstract

The invention discloses a cobalt metaphosphate / nitrogen-carbon-oxygen reduction catalyst, a preparation method and application thereof, and belongs to the field of catalyst materials. The catalyst is Co(PO 3 ) 2 / NC nanomaterials, wherein NC is a nitrogen-doped carbon material, and the steps are: slowly drop the ATMP aqueous solution dropwise into the methanol solution of cobalt nitrate, react for 15-120 minutes, centrifuge, wash, and dry to obtain Precursor; the precursor is calcined at 700-900° C. for 1-3 h under a protective gas atmosphere to obtain the catalyst. The cobalt metaphosphate / nitrogen carbon prepared by the invention is composed of many ultra-thin nanosheets that are compactly and vertically intersected, the thickness of the nanosheets is 20-50 nm, the length is between 0.5-2 μm, and the nanosheets are loaded with Many cobalt metaphosphate nanoparticles with a size of about 10 nm, the catalyst has high onset potential and half-wave potential, strong stability, and strong methanol tolerance.

Description

technical field [0001] The present invention relates to the field of catalyst materials, and more particularly, to a cobalt metaphosphate / nitrogen-carbon-oxygen reduction catalyst and a preparation method and application thereof. Background technique [0002] Traditional fuel vehicles are one of the main sources of environmental pollution. Controlling the energy consumption and emissions of fuel vehicles is an important means to solve environmental problems. In recent years, with the increasingly prominent environmental and energy problems, new energy vehicles are gradually replacing the use of traditional fuel vehicles due to their clean and non-polluting features, and have become a research hotspot for major auto manufacturers and scientific research institutions in the world. Fuel cell vehicles can truly achieve zero emissions and are considered the ultimate solution for new energy vehicles. There are still many problems in the large-scale commercialization of fuel cell ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88B82Y40/00
CPCH01M4/9083H01M4/9016H01M4/8825B82Y40/00Y02E60/50
Inventor 单丹徐莲花刘子萱鲁昆昆
Owner NANJING UNIV OF SCI & TECH
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