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Carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst for fuel cell and preparation method of carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst

A ternary alloy and fuel cell technology, applied in the field of electrochemistry, can solve the problems that hinder the implementation and commercialization of fuel cells, low storage capacity of platinum metal, and low service life, etc., and achieve easy adjustment of morphology, mass production, The effect of improving the service life

Active Publication Date: 2020-06-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] To date, the main cathode catalysts used in fuel cells are platinum (Pt)-based catalysts, but the full-scale implementation and commercialization of fuel cells has been hindered by the low storage capacity and high price of platinum metal, as well as its low service life.

Method used

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  • Carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst for fuel cell and preparation method of carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst
  • Carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst for fuel cell and preparation method of carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Weigh 60 mg of ascorbic acid, 36 mg of cetyltrimethylammonium bromide, 10 mg of platinum acetylacetonate, 7 mg of copper acetylacetonate, and 5 mg of molybdenum carbonyl, and add them to a 50 mL beaker;

[0053] (2) Measure 10 mL of N,N dimethylformamide, add it to the above beaker, and stir it ultrasonically for 30 minutes, and mix evenly to obtain a suspension;

[0054] (3) Transfer the suspension obtained in step (2) to a 25mL stainless steel autoclave, react at 160°C for 7h, and the reaction is completed to obtain a reaction suspension;

[0055] (4) Cool the reaction suspension obtained in step (3) naturally, transfer it to a 50mL centrifuge tube, centrifuge and wash, wherein, product separation: centrifuge at a speed of 10000r / min for 10min, and wash by a mixture of acetone and ethanol (Just mix in any ratio, this embodiment is 1:1) Wash 6 times to obtain PtCuMo metal particles;

[0056](5) Transfer the PtCuMo metal particles washed in step (4) to a 100mL beak...

Embodiment 2

[0059] (1) Weigh 78mg of ascorbic acid, 36mg of cetyltrimethylammonium bromide, 15mg of platinum acetylacetonate, 5mg of copper acetylacetonate, and 8mg of molybdenum carbonyl, and add them to a 50mL beaker;

[0060] (2) Measure 10 mL of N,N dimethylformamide, add it to the above beaker, and stir it ultrasonically for 120 minutes, and mix evenly to obtain a suspension;

[0061] (3) Transfer the suspension obtained in step (2) to a 25mL stainless steel autoclave, react at 170°C for 7h, and obtain a reaction suspension after the reaction is completed;

[0062] (4) Naturally cool the reaction suspension obtained in step (3), transfer it to a 50mL centrifuge tube, centrifuge, wash, and separate the product, centrifuge at a speed of 10000r / min for 10min, and mix it with a mixture of acetone and ethanol (in any proportion) Just mix, this embodiment is 1:1) wash 6 times, get PtCuMo metal particles;

[0063] (5) Transfer the PtCuMo metal particles washed in step (4) to a 100mL beaker...

Embodiment 3

[0066] (1) Weigh 78mg of ascorbic acid, 36mg of cetyltrimethylammonium bromide, 18mg of platinum acetylacetonate, 4mg of copper acetylacetonate, and 10mg of molybdenum carbonyl, and add them to a 50mL beaker;

[0067] (2) Measure 10 mL of N,N dimethylformamide, add it to the above beaker, and stir it ultrasonically for 80 minutes, and mix evenly to obtain a suspension;

[0068] (3) Transfer the suspension obtained in step (2) to a 25mL stainless steel autoclave, react at 200°C for 12h, and obtain a reaction suspension after the reaction is completed;

[0069] (4) Cool the reaction suspension obtained in step (3) naturally, transfer it to a 50mL centrifuge tube, centrifuge and wash it, centrifuge it at a speed of 10000r / min for 10min, and wash it with a mixture of acetone and ethanol at a ratio of 1:1 for 6 times, to obtain PtCuMo metal particles;

[0070] (5) Transfer the PtCuMo metal particles washed in step (4) to a 100mL beaker, add 50mL ethanol, and ultrasonically dispers...

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Abstract

The invention relates to a carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst for a fuel cell and a preparation method of the carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst, and belongs to the technical field of electrochemistry. The preparation method comprises the steps of (1) respectively weighing platinum acetylacetonate, copper acetylacetonate, molybdenum carbonyl, ascorbic acid and hexadecyl trimethyl ammonium bromide to obtain a mixed solution; (2) adding N,N-dimethylformamide into the mixed solution obtained in the step (1) to obtain a suspension; (3) carrying out a reaction on the suspension at the temperature of 150-240 DEG C for 5-24 hours to obtain a reaction suspension; (4) sequentially carrying out centrifugal separation and washing treatment to obtain PtCuMo metal particles; (5) adding ethanol, and carrying out ultrasonic dispersion to obtain platinum-copper-molybdenum metal particle slurry; and (6) weighing carbon powder, adding the carbon powder into the container in the step (5), and carrying out ultrasonic dispersion, suction filtration and drying to obtain the carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst. The method is simple in process and convenient to operate, the energy consumption is reduced, and the preparation method is green and clean. The prepared carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst is uniform in nanoparticle size and has the advantages of being low in platinum loading capacity, high in catalytic activity, high inchemical stability and the like.

Description

technical field [0001] The invention relates to a carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst for fuel cells and a preparation method thereof. The catalyst is a carbon-supported octahedral platinum-copper-molybdenum ternary alloy catalyst (PtCuMo / C), It belongs to the field of electrochemical technology. [0002] technical background [0003] With the rapid development of society and economy, the world's demand for energy continues to grow, and the consumption of fossil fuels and carbon dioxide emissions increase rapidly. The development of "clean, low-carbon, safe, and efficient" energy systems has become a hot research issue. [0004] A fuel cell is a set of highly efficient chemical energy-to-electrical energy conversion technology devices. Fuel cell devices involving fuel (usually hydrogen, methanol, etc.) are very promising energy systems for large-scale development. The oxygen reduction reaction (ORR) is at the heart of many fuel cell...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8878H01M4/921H01M4/926Y02E60/50
Inventor 朱红王晓冉于景华
Owner BEIJING UNIV OF CHEM TECH
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