Preparation and application of self-supporting nitrogen-doped carbon nanotube loaded platinum nano-cluster

A nitrogen-doped carbon, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems affecting the performance and future development of DMFCs, catalyst active surface area reduction, charge transfer resistance increase and other problems to achieve good electrocatalytic activity and long-term stability, improve insufficient electrical conductivity, and prevent dissolution and agglomeration.

Pending Publication Date: 2022-07-01
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of binders will lead to an increase in the charge transfer resistance and lead to a reduction in the active surface area of ​​the catalyst, which in turn affects the performance and future development of DMFCs

Method used

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  • Preparation and application of self-supporting nitrogen-doped carbon nanotube loaded platinum nano-cluster
  • Preparation and application of self-supporting nitrogen-doped carbon nanotube loaded platinum nano-cluster
  • Preparation and application of self-supporting nitrogen-doped carbon nanotube loaded platinum nano-cluster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of a self-supporting nitrogen-doped carbon nanotube-supported platinum nanocluster, which specifically includes the following steps:

[0032] (1) Synthesis of cobalt iron nanowires:

[0033] Take a carbon cloth with a size of 3 cm × 4 cm and sonicate it in a 10 wt.% potassium permanganate solution for 10 min, continue to sonicate in deionized water and ethanol until the solution is completely clear, and then place it in a vacuum oven at 60 °C for 12 h. 388 mg of cobalt nitrate hexahydrate, 270 mg of ferric nitrate nonahydrate, 186 mg of ammonium fluoride and 600 mg of urea were added to 40 ml of deionized water while stirring, and continued stirring at room temperature for 10 min to form a uniform mixed solution. Transfer to a hydrothermal reactor, immerse the carbon cloth in it, and let it stand at 120 °C for 6 h. Then, the carbon cloth was taken out, washed with deionized water and ethanol in turn, and finally dried in a vacuum oven at 40 °C fo...

Embodiment 2

[0051] Example 2: Preparation of a self-supporting nitrogen-doped carbon nanotube-supported platinum nanocluster, which specifically includes the following steps:

[0052] (1) Synthesis of cobalt iron nanowires:

[0053] Take a carbon cloth with a size of 3 cm × 4 cm and sonicate it in a 10 wt.% potassium permanganate solution for 10 min, continue to sonicate in deionized water and ethanol until the solution is completely clear, and then place it in a vacuum oven at 60 °C for 12 h. 388 mg of cobalt nitrate hexahydrate, 270 mg of ferric nitrate nonahydrate, 186 mg of ammonium fluoride and 600 mg of urea were added to 40 ml of deionized water while stirring, and continued stirring at room temperature for 10 min to form a uniform mixed solution. Transfer to a hydrothermal reactor, immerse the carbon cloth in it, and let it stand at 120 °C for 6 h. Then, the carbon cloth was taken out, washed with deionized water and ethanol in turn, and finally dried in a vacuum oven at 40 °C fo...

Embodiment 3

[0059] Example 3: Preparation of a self-supporting nitrogen-doped carbon nanotube-supported platinum nanocluster, which specifically includes the following steps:

[0060] (1) Synthesis of cobalt iron nanowires:

[0061] Take a carbon cloth with a size of 3 cm × 4 cm and sonicate it in a 10 wt.% potassium permanganate solution for 10 min, continue to sonicate in deionized water and ethanol until the solution is completely clear, and then place it in a vacuum oven at 60 °C for 12 h. 388 mg of cobalt nitrate hexahydrate, 270 mg of ferric nitrate nonahydrate, 186 mg of ammonium fluoride and 600 mg of urea were added to 40 ml of deionized water while stirring, and continued stirring at room temperature for 10 min to form a uniform mixed solution. Transfer to a hydrothermal reactor, immerse the carbon cloth in it, and let it stand at 120 °C for 6 h. Then, the carbon cloth was taken out, washed with deionized water and ethanol in turn, and finally dried in a vacuum oven at 40 °C fo...

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Abstract

The invention discloses preparation and application of a self-supporting nitrogen-doped carbon nanotube loaded platinum nano-cluster, and the structural unit of the self-supporting nitrogen-doped carbon nanotube loaded platinum nano-cluster takes carbon cloth as a precursor and nitrogen-doped carbon nanotubes (NCNTs) as a conductive network, and platinum nano-clusters are loaded on the carbon cloth. The preparation method comprises the following steps: taking carbon cloth as a precursor, and preparing the ferrocobalt nanowire from cobalt nitrate hexahydrate, iron nitrate nonahydrate, ammonium fluoride and urea; and preparing the nitrogen-doped carbon nanotube from the carbon cloth on which the ferrocobalt nanowire grows and dicyandiamide. According to the application of the direct methanol fuel cell three-function catalyst in catalyzing ORR and MOR reactions of a direct methanol fuel cell and the electro-catalytic performance in HER reactions, the adsorption efficiency of adsorbed gas can be remarkably enhanced, the stability and the conductivity are improved, and the direct methanol fuel cell three-function catalyst has relatively low overpotential and cost in ORR, MOR and HER reactions and can meet the requirements of commercial application.

Description

technical field [0001] The invention belongs to the technical field of direct methanol fuel cell catalysts, in particular to a self-supporting nitrogen-doped carbon nanotube-supported platinum nano-cluster, a preparation method and its application in a direct methanol fuel cell. Background technique [0002] Nowadays, the world's energy is limited, and the unreasonable exploitation and waste of human beings have caused many problems such as energy crisis and environmental pollution. In order to meet the needs of modern society and alleviate ecological health problems, finding efficient, clean and sustainable energy technologies is an important issue in today's world. Research focus in the field of energy. [0003] Oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) are the core reaction processes of important renewable energy technologies, and their applications involve fuel cells and metal-air batteries. Among fuel cells, proton exchange membrane fuel cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92B82Y30/00B82Y40/00
CPCH01M4/926H01M4/88B82Y30/00B82Y40/00
Inventor 蒋仲庆王文杰
Owner ZHEJIANG SCI-TECH UNIV
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