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Sulfur-containing non-noble metal salt doped hollow nanometer metal organic framework material, and preparation method and application thereof

A metal-organic framework, non-precious metal technology, applied in the field of hollow nano-metal-organic framework materials and their preparation, can solve the problems of poor performance, low stability and high cost of fuel cell cathode catalysts

Active Publication Date: 2020-05-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hollow nano metal organic framework material doped with sulfur-containing non-noble metal salt and its preparation method and application, which can effectively solve the poor performance and low stability of the existing fuel cell cathode catalyst in acidic medium , high cost issues

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  • Sulfur-containing non-noble metal salt doped hollow nanometer metal organic framework material, and preparation method and application thereof
  • Sulfur-containing non-noble metal salt doped hollow nanometer metal organic framework material, and preparation method and application thereof
  • Sulfur-containing non-noble metal salt doped hollow nanometer metal organic framework material, and preparation method and application thereof

Examples

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Embodiment 1

[0040] A method for preparing a hollow nanometer metal-organic framework material doped with sulfur-containing iron metal salts, comprising the steps of:

[0041] 1) Preparation of metal organic framework material precursor: 1.15 parts by mass of dimethylimidazole was added to 50 parts of pure methanol solution, and stirred at 35° C. for 1 hour. 1 part by mass of zinc nitrate hexahydrate was added to 50 parts of pure methanol solution, and stirred at 35° C. for 1 hour. Then the two solutions were fully mixed together, stirred at 50° C. for 1 hour, and stood still for 24 hours to obtain a white metal organic framework material precursor mixed solution. The obtained white metal organic framework material precursor solution was centrifuged five times using pure methanol to obtain a white powder.

[0042] 2) Preparation of sulfur-containing non-noble metal salt solution: 1 part by mass of ferric nitrate hexahydrate was added to 10 parts of pure methanol solution, and stirred at 3...

Embodiment 2

[0049] A method for preparing a hollow nanometer metal-organic framework material doped with sulfur-containing cobalt metal salts, comprising the steps of:

[0050] 1) Preparation of metal organic framework material precursor: 1.15 parts by mass of dimethylimidazole was added to 50 parts of pure methanol solution, and stirred at 35° C. for 1 hour. 1 part by mass of zinc nitrate hexahydrate was added to 50 parts of pure methanol solution, and stirred at 35° C. for 1 hour. Then the two solutions were fully mixed together, stirred at 50° C. for 1 hour, and stood still for 24 hours to obtain a white metal organic framework material precursor mixed solution. The obtained white metal organic framework material precursor solution was centrifuged five times using pure methanol to obtain a white powder.

[0051] 2) Preparation of sulfur-containing cobalt metal salt solution: 1 part by mass of cobalt nitrate hexahydrate was added to 10 parts of pure methanol solution, and stirred at 35...

Embodiment 3

[0055] A method for preparing a hollow nanometer metal-organic framework material co-doped with sulfur-containing cobalt-iron non-noble metal salt, comprising the steps of:

[0056] 1) Preparation of metal organic framework material precursor: 1.15 parts by mass of dimethylimidazole was added to 50 parts of pure methanol solution, and stirred at 35° C. for 1 hour. 1 part by mass of zinc nitrate hexahydrate was added to 50 parts of pure methanol solution, and stirred at 35° C. for 1 hour. Then the two solutions were fully mixed together, stirred at 50° C. for 1 hour, and stood still for 24 hours to obtain a white metal organic framework material precursor mixed solution. The obtained white metal organic framework material precursor solution was centrifuged five times using pure methanol to obtain a white powder.

[0057] 2) Preparation of sulfur-containing metal salt solution: 0.2 parts by mass of cobalt nitrate hexahydrate and 0.8 parts of ferric nitrate hexahydrate were adde...

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Abstract

The invention discloses a sulfur-containing non-noble metal salt doped hollow nanometer metal organic framework material, and a preparation method and an application thereof. The preparation method comprises the following preparation steps: 1) preparation of a metal organic framework material precursor; 2) preparation of a sulfur-containing non-noble metal salt solution; 3) doping of a sulfur-containing non-noble metal salt solution; and 4) pyrolysis preparation of the sulfur-containing non-noble metal salt doped hollow nanometer metal organic framework material. According to the invention, the process flow is simple; the reaction process is easy to be controlled; a template does not need to be introduced in the preparation process; and by introduction of sulfur-containing non-noble metalsalt doping as an excellent cocatalyst, the sulfur-containing non-noble metal salt is highly dispersed in micropores of an original single-crystal metal organic framework structure, and original metalconnecting elements are replaced in the pyrolysis process, so the electronic state and the adsorption property of the surfaces of noble metal particles are changed, and the purpose of improving the catalytic performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal nanomaterials, and relates to a hollow nanometer metal-organic framework material doped with sulfur-containing non-noble metal salt, a preparation method and an application thereof. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of hydrogen or other fuels into electrical energy. Fuel cells are unique in their various potential applications. It can be widely used in internal combustion engines, portable or stationary power supplies, it can power systems as large as public power stations, and can also provide power for small electronic devices like notebooks. Because there is no loss of combustion and mechanical friction, its energy conversion efficiency can be as high as 60%. [0003] Although the concept of fuel cells has been proposed for nearly 100 years, and there have been breakthrough applications in high-end fields such as military industry a...

Claims

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Application Information

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IPC IPC(8): C08G83/00H01M4/90B82Y30/00B82Y40/00
CPCC08G83/008H01M4/9008B82Y30/00B82Y40/00Y02E60/50
Inventor 舒程勇唐伟
Owner XI AN JIAOTONG UNIV
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