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High-stability fuel-cell catalyst modified by oxide and preparation method thereof

A fuel cell, high-stability technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the low stability of transition metal cluster chalcogenides, Restrict the application of fuel cells and other issues to achieve the effects of reducing corrosion and shedding, improving metal utilization, and good stability

Inactive Publication Date: 2011-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the low stability of transition metal cluster chalcogenides limits their practical application in fuel cells

Method used

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  • High-stability fuel-cell catalyst modified by oxide and preparation method thereof
  • High-stability fuel-cell catalyst modified by oxide and preparation method thereof
  • High-stability fuel-cell catalyst modified by oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Add 2ml ZrO(NO 3 ) 2 (10mg Zr / ml) aqueous solution was added to a 250ml beaker, then a mixture of 30ml ethanol and 20ml water was added, stirred evenly by ultrasonic, then 405.2mg XC-72 carbon powder was added, and mixed into a uniform slurry. Put this beaker into a water bath at 60°C, stir, and evaporate the solvent to dryness. The resulting black powder was heat-treated at 300°C in air for 3 hours to obtain ZrO 2 / C composite carrier.

[0049] 2) A. Accurately weigh 100 mg of the above-mentioned composite carrier, add it into 30 ml of ethylene glycol, and stir it ultrasonically to form a uniform slurry. Dilute 6.6ml RuCl3 (3.63mg Ru / ml) ethylene glycol solution and 1ml Na 2 SeO 3 (2.99mg Se / ml) solution was added to 50ml ethylene glycol, ultrasonically mixed evenly, added 2mol / L NaOH ethylene glycol solution, adjusted the pH value to 8, and microwaved for 2min. Add the homogeneous slurry of composite carrier while hot. The temperature was lowered to room tem...

Embodiment 2

[0057] 1) Add 0.5ml ZrO(NO 3 ) 2 (10mg Zr / ml) aqueous solution was added to a 250ml beaker, then a mixture of 30ml ethanol and 20ml water was added, ultrasonically stirred evenly, then 263.3mg XC-72 carbon powder was added, and mixed into a uniform slurry. Put this beaker into a water bath at 60°C, stir, and evaporate the solvent to dryness. The resulting black powder was heat-treated at 300°C in air for 3 hours to obtain ZrO 2 / C composite carrier.

[0058] 2) A. Accurately weigh 100 mg of the above-mentioned composite carrier, add it into 30 ml of ethylene glycol, and stir it ultrasonically to form a uniform slurry. 6.9ml RuCl 3 Add (3.63mg Ru / ml) ethylene glycol solution into 50ml ethylene glycol, mix well by ultrasonic, add 2mol / L NaOH ethylene glycol solution, adjust the pH value to 8, and heat in microwave for 2min. Add the homogeneous slurry of composite carrier while hot. The temperature was lowered to room temperature, the pH value was adjusted to 4 with HCl sol...

Embodiment 3

[0063] 1) Add 0.5ml ZrO(NO 3 ) 2 (10mg Zr / ml) aqueous solution was added to a 250ml beaker, then a mixture of 30ml ethanol and 20ml water was added, ultrasonically stirred evenly, then 263.3mg BP2000 carbon powder was added, and mixed into a uniform slurry. Put this beaker into a water bath at 60°C, stir, and evaporate the solvent to dryness. The resulting black powder was heat-treated at 300°C in air for 3 hours to obtain ZrO 2 / C composite carrier.

[0064] 2) A. Accurately weigh 200 mg of the above-mentioned composite carrier, add it into 60 ml of ethylene glycol, and stir it ultrasonically to form a uniform slurry. 6.9ml RuCl 3 (3.63mg Ru / ml) ethylene glycol solution was added to 50ml ethylene glycol, and ultrasonically mixed evenly, and 2mol / L NaOH ethylene glycol solution was added to adjust the pH value to 9, and microwaved for 2min. Add the homogeneous slurry of composite carrier while hot. The temperature was lowered to room temperature, the pH value was adjuste...

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Abstract

The invention relates to a proton exchange membrane fuel-cell catalyst, in particular to a high-stability fuel-cell catalyst modified by oxide and a preparation method thereof. The preparation method of the high-stability fuel-cell catalyst modified by oxide comprises the following steps: evenly loading the oxide on a carbon carrier, and then depositing active nano metal particles on the composite oxide carrier, wherein the oxide is any or a composite oxide containing two or more elements of Ti, Zr, V, Cr, Mo, W, Mn, Co, Ni and Si, the mass ratio of the oxide to the carbon carrier is (0.01-1): 1, and the mass ratio of the active nano metal particles to the composite oxide carrier is (1:19)-(6:4). The active nano metal particles are anchored on the surface of the carrier by the oxide so asto be evenly dispersed, so that the binding force between the active component and the carrier is enhanced, the stability of the electro-catalyst is improved, and the durability of operation of a fuel cell is improved.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell catalyst, in particular a highly stable fuel cell cathode catalyst, which is characterized in that the nanometer active components in the catalyst are modified by oxides. The invention also relates to a preparation method of the catalyst. Background technique [0002] A fuel cell is an electrochemical power generation device, which directly converts chemical energy into electrical energy isothermally and electrochemically without going through a heat engine process, and is not limited by the Carnot cycle, and has high energy conversion efficiency. At the same time, it is also an environmentally friendly energy conversion device, which hardly emits nitrogen and sulfur oxides, and the emission of carbon dioxide is reduced by more than 40% compared with conventional power plants. Proton exchange membrane fuel cell (PEMFC) not only has the general characteristics of fuel cells, such as high ene...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J23/46B01J23/89H01M4/92H01M4/88
CPCY02E60/50
Inventor 张华民徐婷金虹马原蔚钟和香王美日
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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