Preparation method of electrochemically dealloyed pdcu catalyst for fuel cell

A fuel cell and dealloying technology, which can be used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, fuel cells, etc., and can solve the constraints of large-scale commercial application of Pt-based catalysts and fuel cells , poor anti-poisoning ability and catalytic stability, and low Pt reserves, etc., to achieve excellent catalytic oxidation of methanol performance, increase the electrochemical active area, and complete the effect of the reaction.

Active Publication Date: 2021-11-02
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the catalysts used in fuel cells are mainly Pt-based catalysts, but the large-scale commercial application of Pt-based catalysts and fuel cells is severely restricted due to the small reserves of Pt, high price, poor anti-poisoning ability and catalytic stability.

Method used

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  • Preparation method of electrochemically dealloyed pdcu catalyst for fuel cell
  • Preparation method of electrochemically dealloyed pdcu catalyst for fuel cell
  • Preparation method of electrochemically dealloyed pdcu catalyst for fuel cell

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Experimental program
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Effect test

Embodiment 1

[0043] (1) Dissolve 0.5 g of P123 in 10 mL of double-distilled water with ultrasonic stirring; add 20 mL of a mixed solution containing 10.53 mg of potassium chloropalladate and 3.58 mg of anhydrous copper chloride to the P123 solution, and mix well by ultrasonic stirring.

[0044] (2) Transfer the mixed solution to the liner of a 50 mL polytetrafluoroethylene reactor, put it into the reactor, place it in a drying oven, and stop the reaction after reacting at 180°C for 12 hours.

[0045] (3) After naturally cooling to room temperature, the reaction solution was centrifuged at 10,000 r / min, washed with twice distilled water and absolute ethanol for 3 to 5 times, then dispersed and stored in absolute ethanol to obtain PdCu catalyst.

[0046] figure 1 Shown is the transmission electron microscope figure of the fuel cell PdCu catalyst prepared by the present embodiment, by figure 1 It can be seen that the catalyst prepared by the one-pot hydrothermal method is a hollow nanospher...

Embodiment 2

[0050] (1) Dissolve 0.5 g of P123 in 10 mL of double-distilled water with ultrasonic stirring; add 20 mL of a mixed solution containing 10.53 mg of potassium chloropalladate and 1.71 mg of anhydrous copper chloride to the P123 solution, and mix well by ultrasonic stirring.

[0051] (2) Transfer the mixed solution to the liner of a 50 mL polytetrafluoroethylene reactor, put it into the reactor, place it in a drying oven, and stop the reaction after reacting at 180°C for 12 hours.

[0052] (3) After naturally cooling to room temperature, the reaction solution was centrifuged at 10,000 r / min, washed with twice distilled water and absolute ethanol for 3 to 5 times, then dispersed and stored in absolute ethanol to obtain PdCu catalyst.

[0053] Figure 4 Shown is the transmission electron microscope figure of the fuel cell PdCu catalyst prepared by the present embodiment, by Figure 4 It can be seen that the catalyst prepared by the one-pot hydrothermal method has a nano-chain st...

Embodiment 3

[0057] (1) Dissolve 0.5 g of P123 in 10 mL of double-distilled water with ultrasonic stirring; add 20 mL of a mixed solution containing 10.53 mg of potassium chloropalladate and 6.77 mg of anhydrous copper chloride to the P123 solution, and mix well by ultrasonic stirring.

[0058] (2) Transfer the mixed solution to the liner of a 50 mL polytetrafluoroethylene reactor, put it into the reactor, place it in a drying oven, and stop the reaction after reacting at 180°C for 12 hours.

[0059] (3) After naturally cooling to room temperature, the reaction solution was centrifuged at 10,000 r / min, washed with twice distilled water and absolute ethanol for 3 to 5 times, then dispersed and stored in absolute ethanol to obtain PdCu catalyst.

[0060] Figure 7 Shown is the transmission electron microscope figure of the fuel cell PdCu catalyst prepared by the present embodiment, by Figure 7 It can be seen that the catalyst prepared by the one-pot hydrothermal method is a nano-chain and...

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Abstract

The invention relates to a PdCu catalyst for a fuel cell. The morphology of the PdCu catalyst for a fuel cell is controllable from a hollow nano-sphere to a solid nano-octahedron to a solid cube. The specific method is to ultrasonically dissolve the triblock copolymer P123 in double distilled water; add a mixed solution of potassium chloropalladate, anhydrous copper chloride and potassium iodide to the P123 solution, and ultrasonically stir and dissolve to obtain a homogeneous mixed solution; Transfer the mixed solution to the polytetrafluoroethylene reactor liner, put it in a high-pressure reactor, and place it in a dry box to react; after the reaction is completed, it is naturally cooled to room temperature, centrifuged, washed with twice distilled water and absolute ethanol, A PdCu catalyst for fuel cells was obtained. P123 is used as a protective agent and a reducing agent, and potassium iodide is used as a shape control agent. The obtained PdCu catalyst has good dispersion and has different special shapes and multi-level structures. It has excellent catalytic methanol oxidation performance, anti-poisoning performance and durability. A very promising catalyst.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to catalyst synthesis, shape regulation and electrochemical dealloying, and in particular to a preparation method, dealloying and application of a PdCu catalyst for fuel cells. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a device that directly converts the chemical energy of fuel and oxidant into electrical energy through electrode reaction. It has the advantages of diverse fuels, low noise, and low pollution. It is an efficient, clean, and green energy. Conversion device. PEMFC is an important way to alleviate energy shortage, environmental pollution and global warming. Its energy conversion efficiency is not limited by the Carnot cycle, as high as 60-80%, and its actual efficiency is 2-3 times that of internal combustion engines. At present, the catalysts used in fuel cells are mainly Pt-based catalysts, but the large-scale commercial application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92H01M8/1011B01J23/89B82Y30/00B82Y40/00
CPCB01J23/8926B01J35/0033B82Y30/00B82Y40/00H01M4/921H01M4/925H01M8/1011Y02E60/50
Inventor 周新文张荣华罗来明陈迪胡青云
Owner CHINA THREE GORGES UNIV
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