Platinum-based catalyst carrier of proton exchange membrane fuel cell (PEMFC) and preparation method of platinum-based catalyst carrier

A catalyst carrier and proton exchange membrane technology, applied in the field of materials, can solve problems such as poor electrical conductivity, achieve the effects of enhancing stability, reducing precious metal loading, and improving catalytic performance

Active Publication Date: 2015-05-13
海卓健新能源材料(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of proton exchange membrane fuel cell platinum-based catalyst carrier and preparation method thereof, through g-C 3 N 4 A method of π-π stacking self-assembly between nanosheets and graphene-like carbon materials can effectively overcome g-C 3 N 4 Disadvantages of poor conductivity as an electrocatalytic support material

Method used

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  • Platinum-based catalyst carrier of proton exchange membrane fuel cell (PEMFC) and preparation method of platinum-based catalyst carrier
  • Platinum-based catalyst carrier of proton exchange membrane fuel cell (PEMFC) and preparation method of platinum-based catalyst carrier
  • Platinum-based catalyst carrier of proton exchange membrane fuel cell (PEMFC) and preparation method of platinum-based catalyst carrier

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Effect test

specific Embodiment approach 1

[0031] Specific implementation mode 1: This implementation mode prepares g-C according to the following steps 3 N 4 / Graphene-like carbon composite carrier material:

[0032] Weigh 5g of melamine and 10g of sodium chloride, add 20mL of ultrapure water to it, and ultrasonically disperse for 1 hour to obtain a milky white slurry, then freeze-dry it, put it in a porcelain boat after grinding, wrap it with copper foil, and put the porcelain boat into the tube In a nitrogen atmosphere of a type furnace, at 10°C min -1 Raise the temperature to 550°C at the heating rate and keep it for 2 hours, wash it with ultrapure water after cooling to room temperature, and dry it in vacuum at 70°C to obtain block g-C 3 N 4 Material. Weigh 1g of the above block g-C 3 N 4 And add 20ml of concentrated sulfuric acid and 20ml of concentrated nitric acid mixed solution, ultrasonic 6h, after stirring overnight, use ultrapure water to filter and wash to neutral, freeze-dry to obtain g-C 3 N 4Na...

specific Embodiment approach 2

[0033] Specific embodiment two: this embodiment prepares g-C according to the following steps 3 N 4 Nanosheet / graphene-like carbon composite support material:

[0034] Weigh 5g of urea and 10g of sodium chloride, add 20mL of ultrapure water to it, ultrasonically disperse for 1 hour to obtain a milky white slurry, then freeze-dry it, put it in a porcelain boat after grinding, wrap it with copper foil, and put the porcelain boat into the tube In a nitrogen atmosphere of a type furnace, at 10°C min -1 Raise the temperature to 550°C at the heating rate and keep it for 2 hours, wash it with ultrapure water after cooling to room temperature, and dry it in vacuum at 70°C to obtain block g-C 3 N 4 Material. Weigh 1g of the above block g-C 3 N 4 And add 20ml of concentrated sulfuric acid and 20ml of concentrated nitric acid mixed solution, ultrasonic 6h, after stirring overnight, use ultrapure water to filter and wash to neutral, freeze-dry to obtain g-C 3 N 4 Nanosheets. Weig...

specific Embodiment approach 3

[0035] Specific embodiment three: this embodiment prepares g-C according to the following steps 3 N 4 Nanosheet / graphene-like carbon composite support material:

[0036] Weigh 5g of melamine and 10g of sodium chloride, add 20mL of ultrapure water to it, and ultrasonically disperse for 1 hour to obtain a milky white slurry, then freeze-dry it, put it in a porcelain boat after grinding, wrap it with copper foil, and put the porcelain boat into the tube In a nitrogen atmosphere of a type furnace, at 10°C min -1 Raise the temperature to 550°C at the heating rate and keep it for 2 hours, wash it with ultrapure water after cooling to room temperature, and dry it in vacuum at 70°C to obtain block g-C 3 N 4 Material. Weigh 1g of the above block g-C 3 N 4 And add 20ml of concentrated sulfuric acid and 20ml of concentrated nitric acid mixed solution, ultrasonic 6h, after stirring overnight, use ultrapure water to filter and wash to neutral, freeze-dry to obtain g-C 3 N 4 Nanoshe...

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Abstract

The invention discloses a platinum-based catalyst carrier of a proton exchange membrane cell (PEMFC) and a preparation method of the platinum-based catalyst carrier. The platinum-based catalyst carrier is a g-C3N4 nanosheet/quasi-graphene carbon composite material. The preparation method comprises steps as follows: (1), a g-C3N4 precursor and inorganic salt are weighed and mixed uniformly to obtain a mixture A; (2), the mixture A is put into nitrogen atmosphere of a tube furnace in a semi-sealed manner, is heated to 500-700 DEG C and remains at the temperature for 1-5 h to obtain a material B; (3), the material B is ground, then washed and filtered with super-pure water and subjected to vacuum drying to obtain a block-shaped g-C3N4 material C; (4), the g-C3N4 material is added to concentrated acid, subjected to ultrasonic-wave stirring, washed with super-pure water until the pH is neutral, and subjected to centrifugal drying to obtain a g-C3N4 nanosheet; (5), the g-C3N4 nanosheet and quasi-graphene carbon are weighed, added to an alcohol solution and subjected to ultrasonic dispersion, extraction filtration and freezing drying to obtain a composite material. The preparation method is simple and feasible, the precious metal carrying capacity of the platinum-based catalyst is promisingly reduced, and accordingly, the production cost of the fuel cell is reduced.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a platinum-based catalyst carrier for a proton exchange membrane fuel cell and a preparation method thereof, in particular to a g-C 3 N 4 Nanosheet / graphene-like carbon composite carrier material and preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high specific energy and specific power, less environmental pollution, can work at room temperature, low price of methanol and compatible with existing refueling systems, etc. It is the most promising for electric vehicles and Power supply for various mobile devices. At present, the performance and cost of PEMFC still cannot meet the requirements of commercial application, a large part of which is due to the high cost of the catalyst, poor catalytic activity and stability. [0003] Studies have shown that the external environment of PEMFC operation (air temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/92H01M4/88
CPCY02E60/50
Inventor 王振波李存智刘静赵磊张立美张靖佳顾大明
Owner 海卓健新能源材料(上海)有限公司
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