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Preparation method and application of PtPdCu electrocatalyst for fuel cells

An electrocatalyst, fuel cell technology, applied in the direction of fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of low reserves, restrict the commercialization process of fuel cells, high cost, and achieve large applications and development prospects, excellent electric power. Catalytic oxidation of methanol performance, easy operation effect

Active Publication Date: 2017-11-10
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pt-based nanomaterials are difficult to replace catalysts for direct methanol fuel cells, but because Pt is a noble metal, its reserves are low and its cost is high, which seriously restricts the commercialization of fuel cells.

Method used

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  • Preparation method and application of PtPdCu electrocatalyst for fuel cells
  • Preparation method and application of PtPdCu electrocatalyst for fuel cells
  • Preparation method and application of PtPdCu electrocatalyst for fuel cells

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Take 0.5 g triblock copolymer P123 and dissolve it in 20 mL double-distilled water by ultrasonic stirring; add 1 mL chloroplatinic acid hexahydrate solution (0.8 g / mL), 10 mg potassium chloropalladate , 3 mg of anhydrous copper chloride and 1 mg of potassium iodide, stirred, ultrasonically dissolved, and mixed uniformly. In the final mixed solution, the concentrations of chloroplatinic acid hexahydrate, potassium chloropalladate and copper chloride were all 0.03 mmol / L, Potassium iodide concentration is 0.01 mmol / L.

[0031] (2) Transfer the mixed solution to the liner of a 50 mL polytetrafluoroethylene reactor, seal the reactor tightly, place it in a blast drying oven, and react at 180°C for 12 hours.

[0032] (3) Naturally cool to room temperature, centrifuge the black suspension obtained after the reaction at 10,000 r / min, wash twice with twice distilled water, then three times with absolute ethanol, and finally add the washed product to The PtPdCu electrocataly...

Embodiment 2

[0037] (1) Take 0.5 g triblock copolymer P123 and dissolve it in 20 mL double-distilled water by ultrasonic stirring; add 1 mL chloroplatinic acid hexahydrate solution (0.8 g / mL), 10 mg potassium chloropalladate , 3 mg of anhydrous copper chloride and 20 mg of potassium iodide, stirred, ultrasonically dissolved, and mixed uniformly. In the final mixed solution, the concentrations of chloroplatinic acid hexahydrate, potassium chloropalladate and copper chloride were all 0.03 mmol / L, Potassium iodide concentration is 0.03-0.05 mmol / L.

[0038] (2) Transfer the mixed solution to the liner of a 50 mL polytetrafluoroethylene reactor, seal the reactor tightly, place it in a blast drying oven, and react at 180 °C for 12 hours.

[0039](3) Naturally cool to room temperature, centrifuge the black suspension obtained after the reaction at 10,000 r / min, wash twice with twice distilled water, then three times with absolute ethanol, and finally add the washed product to The PtPdCu electro...

Embodiment 3

[0044] (1) Take 0.5 g triblock copolymer P123 and dissolve it in 20 mL double-distilled water by ultrasonic stirring; add 1 mL chloroplatinic acid hexahydrate solution (0.8 g / mL), 10 mg potassium chloropalladate , 3 mg anhydrous copper chloride and 40 mg potassium iodide, stirred, ultrasonically dissolved, and mixed uniformly. In the final mixed solution, the concentrations of chloroplatinic acid hexahydrate, potassium chloropalladate and copper chloride were all 0.03 mmol / L, Potassium iodide concentration is 0.10 mmol / L.

[0045] (2) Transfer the mixed solution to the liner of a 50 mL polytetrafluoroethylene reactor, seal the reactor tightly, place it in a blast drying oven, and react at 180 °C for 12 hours.

[0046] (3) Naturally cool to room temperature, centrifuge the black suspension obtained after the reaction at 10,000 r / min, wash twice with twice distilled water, then three times with absolute ethanol, and finally add the washed product to The PtPdCu electrocatalyst f...

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Abstract

The invention relates to a preparation method and application of a PtPdCu electrocatalyst for fuel cells. The method adopts a one-step hydro-thermal synthesis technology, and the synthetic method comprises the following steps: taking triblock copolymer P123 to be dissolved in redistilled water; adding chloroplatinic acid hexahydrate, potassium chloropalladite, anhydrous cupric chloride and potassium iodide into a P123 solution, and carrying out stirring and ultrasonic dissolution; transferring the mixed solution into the liner of a 50 mL polytetrafluoroethylene reaction still, sealing the reaction still, putting in an air blowing drying box, and reacting at the temperature of 120 to 200 DEG C for 6 to 12 hours; naturally cooling to room temperature, centrifuging and washing three to five times to obtain the PtPdCu electrocatalyst for the fuel cells. The triblock copolymer P123 serves as a protective agent and a reducing agent simultaneously, the potassium iodide serves as a morphological control agent and a surface modification agent, and the obtained PtPdCu electrocatalyst is of a hollow nanometer chain structure, so that the PtPdCu electrocatalyst has excellent electrocatalytic oxidation methyl alcohol performance and is a fuel-cell catalyst with excellent development prospects.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a method for preparing a catalyst, in particular to a method for preparing a PtPdCu electrocatalyst for a fuel cell. Background technique [0002] Fuel cells are considered to be the third-generation power system after steam engines and internal combustion engines. It can directly convert the chemical energy of fuel into electrical energy without being limited by the Carnot cycle. Clean and environmentally friendly new energy technology [1] . Direct methanol fuel cell is different from general hydrogen-oxygen fuel cell, it does not need to convert methanol into hydrogen, but directly uses methanol as the fuel of the battery, not only the fuel is cheap and easy to store, the direct methanol fuel cell system is compared with other types As far as the fuel cell is concerned, it also has the advantages of simple structure, high theoretical specific energy density, rapid start-up, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92H01M8/1011
CPCH01M4/88H01M4/921H01M8/1011Y02E60/50
Inventor 周新文杨翼代忠旭张荣华陈迪罗来明
Owner CHINA THREE GORGES UNIV
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