Fuel cell catalyst and preparation method thereof

A fuel cell and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve the problems of insignificant effect of anti-poisoning ability, easy poisoning, and reduced catalyst activity, etc. Poisoning ability, not easy to peel off, good conductivity and effect of surface area

Inactive Publication Date: 2012-07-18
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, direct liquid fuel cells generally use noble metal Pt or Pd as the main active component to be loaded on a carbon carrier with high specific surface area and good conductivity, but because Pt or Pd catalysts are prone to poisoning during use, thereby reducing the activity of the catalyst
In order to improve the anti-poisoning ability of the catalyst, the researchers proposed to reduce the poisoning effect by modifying Pt or Pd, such as preparing b...

Method used

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  • Fuel cell catalyst and preparation method thereof
  • Fuel cell catalyst and preparation method thereof
  • Fuel cell catalyst and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a preparation method of fuel catalyst, comprising:

[0040] a) mixing the carbon carrier with an acid salt solution containing rare earth elements to obtain a suspension;

[0041] b) precipitating the rare earth elements in the suspension with an alkaline substance to obtain a carbon carrier composited with hydroxides of the rare earth elements;

[0042] c) sintering the carbon carrier composited with the hydroxide of the rare earth element to obtain a composite carrier;

[0043] d) mixing the precursor of the noble metal with the composite carrier, and microwave sintering to obtain the fuel cell catalyst.

[0044] According to the present invention, at first prepare the acidic salt solution containing rare earth element,

[0045] a1) dissolving rare earth oxides in concentrated nitric acid to obtain an acid salt solution containing rare earth elements;

[0046] a2) carrying out the acid salt solution with 1:1 ethanol and secondary...

Embodiment 1

[0063] ReO to Eu 2 o 3 Taking rare earth oxides as an example, Pd is used as a noble metal, and the mass content of Pd and rare earth oxides in PdEuO / C is 20% and 15% for illustration.

[0064] Weigh 20mg of rare earth oxide (Eu 2 o 3 ) was dissolved in 10ml of concentrated nitric acid, and then diluted with 40ml of 1:1 ethanol and secondary water. Add 80mg of activated carbon to the above solution for half an hour of ultrasonic treatment and 2 hours of mechanical stirring, then add 100ml of 1M sodium carbonate solution and 10mL of 1M sodium hydroxide to the above solution to form Eu 2 o 3 precipitation. Finally, the above mixed solution is filtered, washed, and the solid matter is transferred to a tube furnace for thermal decomposition treatment at a certain temperature under the protection of nitrogen to obtain stable Eu 2 o 3 / C composite carrier. 80 mg of the composite carrier obtained above and a certain amount of noble metal precursor H 2 PdCl 6 (containing 20m...

Embodiment 2

[0066] ReO to Ce 2 o 3 Rare earth oxides are taken as an example, and Pd is used as a noble metal, and its content and preparation method are the same as above.

[0067] image 3 is Pd Ce 2 o 3 / C and Ce 2 o 3 The XRD pattern of the C carrier, it can be seen from the figure that Ce 2 o 3 and Pd diffraction peaks exist.

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Abstract

The invention provides a fuel cell catalyst, which comprises a composite carrier and a noble metal, wherein the composite carrier is prepared by a rare earth oxide and a carbon carrier, and the noble metal is loaded on the composite carrier. The catalyst provided by the invention has excellent poisoning resisting capability. The invention also provides a preparation method of the fuel cell catalyst. The preparation method comprises the steps of: (1) mixing the carbon carrier with an acid salt solution containing rare earth element to obtain a suspension; (2) precipitating the rare earth element in the suspension with an alkaline matter to obtain a rare earth element hydroxide compounded carbon carrier; (3) sintering the rare earth element hydroxide compounded carbon carrier to obtain the composite carrier; and (4) mixing a noble metal precursor with the composite carrier, and carrying out microwave sintering to obtain the fuel cell catalyst. The preparation method provided by the invention is simple, controllable and high in production efficiency.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell catalyst and a preparation method thereof. Background technique [0002] A direct liquid fuel cell is an electrochemical reaction device that directly uses liquid fuel (such as methanol, formic acid, ethanol) and oxygen in the air to convert chemical energy into electrical energy. Because of its high energy conversion efficiency, simple structure, safety and reliability, cleanliness, and no need for complicated external equipment such as reforming, heating, cooling devices, pressure pumps, fans, etc., it is considered to be the most likely to achieve commercial application first. Fields such as small portable mobile power supplies and sensors have broad application prospects. [0003] At present, direct liquid fuel cells generally use noble metal Pt or Pd as the main active component to be loaded on a carbon carrier with high specific surface area and good conductivity, but...

Claims

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Application Information

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IPC IPC(8): H01M4/90B01J23/63B01J23/66
CPCY02E60/50
Inventor 冯立纲刘长鹏赵晓梁亮邢巍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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