Carbon-containing metal catalyst, preparation method and application thereof

A metal catalyst and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve chemical corrosion, difficulties in preparing nano-carbon airgel, Catalyst durability reduction and other problems, to achieve the effect of prolonging life, improving the ability to resist carbon monoxide poisoning, and not easy to reunite

Inactive Publication Date: 2013-07-31
上海氢尚新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to prepare nano-carbon airgel, and as an amorphous carbon airgel material, it is prone to chemical corrosion in the harsh working environment of PEMFC, resulting in a decrease in the durability of the catalyst.

Method used

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  • Carbon-containing metal catalyst, preparation method and application thereof
  • Carbon-containing metal catalyst, preparation method and application thereof
  • Carbon-containing metal catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Place 1 g of PAN and 0.05 g of manganese acetate in 10 ml of DMF and stir at 30°C for 3 hours to prepare a uniform manganese acetate / PAN mixed solution;

[0032] (2) Inject the manganese acetate / PAN mixed solution obtained in (1) into a disposable syringe for spinning. The voltage is 10KV, the flow rate is 0.15ml / h, the receiving distance is 10cm, and the receiving material is aluminum sheet;

[0033] (3) Put the manganese acetate / PAN nanofibers obtained in (2) into a vacuum oven at 50°C for 6h;

[0034] (4) Put the manganese acetate / PAN nanofibers obtained in (3) into a ceramic boat, and place it in a muffle furnace at 250°C for pre-oxidation and stabilization for 1 hour, with a heating rate of 1°C / min;

[0035] (5) Put the manganese acetate / PAN nanofibers obtained in (4) into a quartz tube furnace for carbonization for 0.5 h, the carbonization temperature is 900 ℃, the heating rate is 1 ℃ / min, and the impurity-free manganese / carbon is obtained Nanofibers;

[0036] (6) Put ...

Embodiment 2

[0038] (1) Put 1.2 g of PAN, 0.02 g of ferric chloride, and 0.02 g of molybdenum acetate in 10 ml of DMF, and stir at 30°C for 10 hours to prepare a uniform ferric chloride / molybdenum acetate / PAN mixed solution;

[0039] (2) Inject the ferric chloride / molybdenum acetate / PAN mixed solution obtained in (1) into a disposable syringe for spinning. The voltage is 12KV, the flow rate is 0.2ml / h, the receiving distance is 12cm, and the receiving material is aluminum sheet. ;

[0040] (3) Put the ferric chloride / molybdenum acetate / PAN nanofibers obtained in (2) into a vacuum oven at 50°C for 6h;

[0041] (4) Put the ferric chloride / molybdenum acetate / PAN nanofibers obtained in (3) into a ceramic boat, and put it directly into a muffle furnace at 250°C for pre-oxidation and stabilization for 2 hours, with a heating rate of 2°C / min;

[0042] (5) Put the ferric chloride / molybdenum acetate / PAN mixed nanofibers obtained in (4) into a quartz tube furnace for carbonization for 0.5 h, the carbonizati...

Embodiment 3

[0045] (1) Place 1.1 g of PAN in 10 ml of DMF and stir at 30°C for 6 hours to prepare a uniform PAN solution;

[0046] (2) Inject the PAN solution obtained in (1) into a disposable syringe for spinning. The voltage is 13KV, the flow rate is 0.2ml / h, the receiving distance is 13cm, and the receiving material is aluminum sheet;

[0047] (3) Put the PAN nanofibers obtained in (2) into a vacuum oven at 50°C for 6h;

[0048] (4) Load the PAN nanofibers obtained in (3) into a ceramic boat, and put it directly into a muffle furnace at 250°C for pre-oxidation and stabilization for 2 hours, with a heating rate of 2°C / min;

[0049] (5) Put the PAN nanofibers obtained in (4) into a quartz tube furnace for carbonization for 0.5 h, the carbonization temperature is 900°C, and the heating rate is 2°C / min, to obtain the carbon nanofibers;

[0050] (6) Put the certain 100 mg of carbon nanofibers without impurities in ethylene glycol to form 100 ml of 0.1% carbon nanofiber dispersion, sonicate for a cert...

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Abstract

The invention discloses a carbon-containing metal catalyst, a preparation method and an application thereof. The catalyst uses carbon fiber material as a carrier, and uses sodium borohydride, methanol or glycol as a reducing agent. One or several of chloroplatinic acid, chloroauric acid, and other metal precursors are mixed and then reduced to obtain a metal/carbon nanofiber catalyst for fuel cells, preferably with a metal loading amount being 10-60 wt %. The catalyst is high in initially electrochemically active surface area, and relatively small in current density attenuation during a 120-minute chronoamperometry test, has a current density higher than that of present commercial platinum catalyst/XC72R (40 %) during a whole electrochemical chronoamperometry test, and shows relatively high electrochemical activity, relatively high current density and relatively superior electrochemical stability. The catalyst show extremely high resistance to carbon monoxide toxicity.

Description

Technical field [0001] The invention relates to a carbon-supported metal catalyst and a preparation method and application thereof, in particular to a nano-carbon fiber-supported metal catalyst for fuel cells. Background technique [0002] The catalyst carrier is one of the key materials for the catalytic layer of polymer membrane fuel cells, and it is also a hot spot in scientific research. As a catalyst carrier, it must have appropriate pore size distribution, large specific surface area, excellent electrochemical stability and high conductivity, etc., and can provide high electrical conductivity, good gas channels, and sufficient water holding capacity. . The catalyst carrier not only directly affects the particle size, dispersion and activity of the catalyst, but also affects the conductivity, mass transfer and electrochemical specific surface area of ​​the catalytic layer. At present, the catalyst supports are mainly carbon materials. Among them, activated carbon, graphit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92B01J23/656B01J23/881B01J23/89B01J23/42B01J23/44
CPCY02E60/50
Inventor 张永明王超楠袁望章李虹
Owner 上海氢尚新能源科技有限公司
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