Fuel-cell catalyst doping with porous diamond carrier and preparation method

A fuel cell and diamond technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of uncontrollable dispersion of active metals, reduced catalytic activity of catalysts, etc., to achieve strong antioxidant capacity, improved uniformity, and excellent catalytic activity. Effect

Inactive Publication Date: 2018-11-09
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the fact that nano-diamond particles are currently used as a carrier, the dispersion of active metals cannot be controlled, thereby reducing the catalytic activity of the catalyst. The present invention proposes a fuel cell catalyst doped with a porous diamond carrier and a preparation method, thereby greatly improving the structural stability of the catalyst carrier. , the prepared catalyst has more excellent catalytic activity, and the preparation process is simple, which has the potential of large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Sequentially use acetone, ethanol and deionized water to ultrasonically clean the flake metal nickel electrode for 15 minutes, ultrasonically oscillate the ethanol solution with a concentration of 2.5 mg / m doped source boron powder for 30 minutes to form a dispersion, drop it on the carrier, and dry it ;

[0035] (2) Place the sheet-shaped metal electrode dried in step (1) as the electrode material of the composite gas diffusion layer on the platform of the arc plasma spraying device, and control the arc plasma to bombard the sheet-shaped metal electrode 5 times at intervals, each time The time is 5 minutes, the temperature of the sheet metal electrode is controlled to 450°C, and fine purification and activation treatment are carried out;

[0036] (3) The mixed gas of hydrogen and methane is ejected through the inner nozzle of the plasma gun mouth, the flow rate of the hydrogen / methane mixed gas is 40sccm, the concentration of methane is 0.5%, the pressure of the nozz...

Embodiment 2

[0040] (1) Sequentially use acetone, ethanol and deionized water to ultrasonically clean the sheet metal nickel electrode for 15 minutes, ultrasonically oscillate the ethanol solution with a concentration of 6.5 mg / m doped with phosphorus source for 30 minutes to form a dispersion, drop it on the carrier, and dry it;

[0041] (2) Place the sheet-shaped metal electrode dried in step (1) as the electrode material of the composite gas diffusion layer on the platform of the arc plasma spraying device, and control the arc plasma to bombard the sheet-shaped metal electrode 5 times at intervals, each time The time is 5 minutes, the temperature of the sheet metal electrode is controlled to 550°C, and fine purification and activation treatment are carried out;

[0042] (3) The mixed gas of hydrogen and methane is ejected through the inner nozzle of the plasma gun mouth, the flow rate of the hydrogen / methane mixed gas is 45 sccm, the concentration of methane is %, the nozzle pressure of ...

Embodiment 3

[0046] (1) Sequentially use acetone, ethanol and deionized water to ultrasonically clean the flake metal nickel electrode for 15 minutes, ultrasonically oscillate the boron nitride ethanol solution with a concentration of 6.8 mg / m doping source for 30 minutes to form a dispersion, drop it on the carrier, and dry Dry;

[0047] (2) Place the sheet-shaped metal electrode dried in step (1) as the electrode material of the composite gas diffusion layer on the platform of the arc plasma spraying device, and control the arc plasma to bombard the sheet-shaped metal electrode 3 times at intervals, each time The time is 5 minutes, the temperature of the sheet metal electrode is controlled to 450°C, and fine purification and activation treatment are carried out;

[0048] (3) The mixed gas of hydrogen and methane is ejected through the inner nozzle of the plasma gun mouth, the flow rate of the hydrogen / methane mixed gas is 50 sccm, the concentration of methane is 2%, the nozzle pressure o...

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Abstract

The invention provides a fuel-cell catalyst doping with a porous diamond carrier and a preparation method. A flaky metal electrode material is used as a substrate; an arc plasma is used for depositinga diamond film on a surface layer; a used gas source is hydrogen, argon and methane; a mixed gas of the hydrogen and the methane is sprayed through a nozzle in a plasma muzzle; the argon and a gas-state/steam-state doping source is sprayed through a nozzle outside the muzzle by loading nano platinum/tin alloy powder, and a composite material doping with porous diamond/alloy is formed on the surface layer of the substrate. According to the fuel-cell catalyst doping with the porous diamond carrier and a preparation method provided by the invention, the porous nano diamond is used as a carrier for coating the nano alloy, and the porous nano diamond is used as the carrier so as to have high oxidation resistance and good active metal dipersibility, so that the stability of the catalyst is improved, and the defect that the catalytic activity of the catalyst is further reduced since the active metal dipersibility cannot be controlled when current nano diamond particles are used as the carrier is further overcome.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell catalyst doped with a porous diamond carrier and a preparation method thereof. Background technique [0002] The research and development of fuel cell electric vehicles is booming internationally. Proton exchange membrane fuel cell (protonexchange membrane fuel cell, PEMFC) has the advantages of high energy conversion rate, high power density, fast start-up and no pollution, and is especially suitable as a mobile power source. At present, the main technical difficulties affecting the commercialization of fuel cell vehicles come from the life and cost of fuel cells. The durability of fuel cells for vehicles is poor, mainly due to the impact of vehicle operating conditions on fuel cells. [0003] The proton exchange membrane electrode is the core component of the proton exchange fuel cell, which is a three-in-one structure composed of proton exchange membrane, cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88B82Y30/00
CPCB82Y30/00H01M4/8817H01M4/886H01M4/8889H01M4/921H01M4/926Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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