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Nano blue diamond catalyst of fuel cell, preparation method and fuel cell

A fuel cell and catalyst technology, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as inability to apply alcohol fuel cells, limited commercial application, and scarcity of Pt, and achieve excellent Mechanical strength, low price, and the effect of improving efficiency

Active Publication Date: 2021-05-07
GUANGZHOU DEPOSON ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scarcity and high price of Pt severely limit its commercial application
And the Pt / C layer as the cathode catalyst layer is easily oxidized in alcohol fuels to cause CO poisoning, making it impossible to apply to alcohol fuel cells, so the research on non-Pt catalysts has very important practical significance

Method used

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  • Nano blue diamond catalyst of fuel cell, preparation method and fuel cell
  • Nano blue diamond catalyst of fuel cell, preparation method and fuel cell
  • Nano blue diamond catalyst of fuel cell, preparation method and fuel cell

Examples

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preparation example Construction

[0040] The invention provides a nano-blue diamond catalyst for a fuel cell and a preparation method thereof. The nano-blue diamond catalyst is a structure in which the outer conductive diamond wrapping layer wraps the inner core and is non-conductive diamond. The nano-blue diamond catalyst for the fuel cell provided by the invention The preparation method makes, comprises the steps:

[0041] Step S1:

Embodiment 01

[0043] The carbon-containing explosive is converted into diamond by an explosion method to obtain an intermediate product, and the intermediate product is screened to separate and obtain nano-diamond particles.

[0044] Among them, the principle of transforming the explosive method into diamond is: the carbon-containing explosive with negative oxygen balance is used as the raw material, and the oxygen in the explosive molecule is not enough to oxidize all the carbon into CO or CO during detonation. 2 , so there is free carbon in the detonation zone, and under the action of high pressure and high temperature in the detonation zone, the free carbon is partially transformed into diamond. The resulting product includes not only diamond, but also impurities such as graphite and amorphous carbon. In order to obtain the desired diamond powder, it needs to be screened and separated. The diameter of the isolated diamond nanoparticle is less than 20 nm. In a preferred embodiment of the ...

Embodiment 02

[0047] The diamond crystal is grown by a high temperature and high pressure method or a chemical vapor deposition method, and the diamond crystal is pulverized into micro-nano-level particles by physical means to obtain nano-diamond particles.

[0048] The high temperature and high pressure method uses a catalyst to convert carbon sources such as graphite into diamond under high temperature and high pressure conditions, while the chemical vapor deposition method includes hot wire method and microwave method. Under the condition of pressure lower than standard atmospheric pressure, carbon-containing gas and hydrogen gas are excited and dissociated, thus forming diamond.

[0049] Large sheets of diamond crystals are grown by high temperature and high pressure method or chemical vapor deposition method, and the grown large sheets of diamond crystals are crushed into micro-nano particles by physical means such as crushing and grinding.

[0050] For example, using the high temperatur...

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Abstract

The invention provides a nano blue diamond catalyst of a fuel cell and a preparation method. The preparation method comprises the following steps of: S1, converting a carbon-containing explosive into diamond through an explosion method to obtain an intermediate product, and screening and separating the intermediate product to obtain nano diamond particles, or growing diamond crystals through a high-temperature and high-pressure method or a chemical vapor deposition method, and crushing the diamond crystals into micro-nano-scale particles through a physical means to obtain nano-diamond particles; S2, providing non-conductive diamond as a substrate material, and assembling the nano diamond particles as raw materials on the surface of the substrate material to form a conductive diamond wrapping layer, so as to obtain the nano blue diamond catalyst; and S3, carrying out surface treatment on the nano blue diamond catalyst, so as to make the nano blue diamond catalyst to have hydrophobicity or hydrogen absorption.

Description

technical field [0001] The invention relates to a nano-blue diamond catalyst for a fuel cell, a preparation method and a fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC for short) is a kind of fuel cell, which is equivalent to the "reverse" device of water electrolysis in principle. Its single cell is composed of anode, cathode and proton exchange membrane. The anode is the place where the hydrogen fuel is oxidized, and the cathode is the place where the oxidant is reduced. Both electrodes contain catalysts to accelerate the electrochemical reaction of the electrode, and the proton exchange membrane is used as the electrolyte. When working, it is equivalent to a DC power supply, its anode is the negative pole of the power supply, and the cathode is the positive pole of the power supply. [0003] The working process of the fuel cell is actually the reverse process of electrolysis of water. The basic principle was proposed by the British law...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90C01B32/28C01B32/26C01B32/25B82Y30/00
CPCH01M4/8825H01M4/9091C01B32/26C01B32/28C01B32/25B82Y30/00Y02E60/50
Inventor 钟建华张文英
Owner GUANGZHOU DEPOSON ELECTRIC TECH
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