PtPd electrocatalyst used for fuel cell and preparation method for PtPd electrocatalyst

An electrocatalyst, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of restricting the commercialization process of fuel cells, high cost, low reserves, etc., and achieve excellent electrocatalytic methanol oxidation performance and short synthesis time. , the effect of large applications and development prospects

Active Publication Date: 2016-12-07
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of research and development of fuel cells, catalysts are one of the most critical and waiting for breakthrough bottlenecks. In direct alcohol fuel cells, Pt-based nanomaterials are difficult to replace catalysts in proton exchange membrane fuel cells, but because Pt is a noble metal , low reserves and high cost seriously restrict the commercialization process of fuel cells

Method used

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  • PtPd electrocatalyst used for fuel cell and preparation method for PtPd electrocatalyst
  • PtPd electrocatalyst used for fuel cell and preparation method for PtPd electrocatalyst
  • PtPd electrocatalyst used for fuel cell and preparation method for PtPd electrocatalyst

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Effect test

Embodiment 1

[0029] (1) Take 1.0 g of triblock copolymer P123 and dissolve it in 30 mL of double-distilled water by ultrasonic stirring, transfer it to a three-necked bottle and stir it on a magnetic stirrer with a temperature controller, and control the temperature at 30 ℃.

[0030] (2) Slowly add 10 mL of K to the P123 solution dropwise 2 PdCl 4 solution (0.02mmol / L), after the dropwise addition was completed, immediately continue to add 10 mL of K 2 PtCl 6 Solution (0.02mmol / L), magnetic stirring reaction 2h.

[0031] (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 wash three times with absolute ethanol, and finally wash the The product is added into absolute ethanol for dispersion protection to obtain a PtPd-1 electrocatalyst for fuel cells.

[0032] figure 1 Shown is the transmission electron microscope (TEM) figure of the PtPd-1 electrocatalyst for fuel cell prepar...

Embodiment 2

[0036] (1) Take 1.0 g of triblock copolymer P123 and dissolve it in 30 mL of double-distilled water by ultrasonic stirring, transfer it to a three-necked bottle and stir it on a magnetic stirrer with a temperature controller, and control the temperature at 30 ℃.

[0037] (2) Slowly add 10 mL of K to the P123 solution dropwise 2 PdCl 4 (0.02mmol / L) and 10 mL K 2 PtCl 6 Solution (0.02mmol / L) mixed solution, magnetic stirring reaction 2h.

[0038] (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 wash three times with absolute ethanol, and finally wash the The product is added into anhydrous ethanol for dispersion protection to obtain a PtPd-2 electrocatalyst for fuel cells.

[0039] figure 2 Shown is the transmission electron microscope (TEM) figure of the PtPd-2 electrocatalyst for the fuel cell prepared by the present embodiment, by figure 2 a It can be se...

Embodiment 3

[0043] (1) Dissolve 1.0 g of triblock copolymer P123 in 30 mL of secondary distilled water with stirring and ultrasonic, transfer it to a three-necked flask and place it on a magnetic stirrer with a temperature controller to stir, and control the temperature at 100 °C.

[0044] (2) Add 10 mL K slowly dropwise to the P123 solution 2 PdCl 4 (0.02mmol / L) and 10 mL K 2 PtCl 6 The mixed solution of the solution (0.02mmol / L) was reacted with magnetic stirring for 2h.

[0045] (3) Cool to room temperature naturally, centrifuge the black suspension obtained after the reaction at 10,000 r / min, first wash twice with double distilled water, then three times with absolute ethanol, and finally wash the cleaned The product is added with anhydrous ethanol to disperse and protect to obtain PtPd-100 electrocatalyst for fuel cell.

[0046] image 3 Shown is the transmission electron microscope (TEM) image of the PtPd-100 electrocatalyst for fuel cells prepared in this example, from im...

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Abstract

The invention relates to a PtPd electrocatalyst used for a fuel cell and a preparation method for the PtPd electrocatalyst. The preparation method comprises the following steps of dissolving a tri-block copolymer P123 into secondary distilling water, stirring, controlling the temperature to be 30-120 DEG C, adding a K<2>PdCl<4> solution to the P123 solution dropwise, after completing the adding of the K<2>PdCl<4> solution, adding a K<2>PtCl<6> solution, stirring and reacting for 2-6h, and performing centrifuging and washing on a black suspension liquid which is obtained through reaction to obtain the PtPd electrocatalyst used for the fuel cell. The tri-block copolymer P123 is used as a protective agent; meanwhile, based on the reaction selectivity of the tri-block copolymer P123 which can effectively restore the K<2>PdCl<4> rather than the K<2>PtCl<6>, the Pd obtained through reduction is subjected to a potential replacement reaction with the K<2>PtCl<6>; and the obtained PtPd electrocatalyst has a new and different hollow net-shaped structure and excellent electrocatalytic oxidation methyl alcohol performance, and is a fuel cell catalyst with extremely high development prospect.

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 PtPd electrocatalyst for a fuel cell. Background technique [0002] Energy and environment are currently the hotspots of research and development worldwide. Fuel cells can directly convert the chemical energy of fuel into electrical energy, without being limited by the Carnot cycle, with high efficiency and no pollution. It is one of the key development directions of alternative energy today. Direct Alcohol Fuel Cell (DAFC) has the advantages of low raw material cost, wide range of sources, good low-temperature performance, and high energy density. It is currently the most likely power source for electric vehicles, distributed power stations, and portable mobile power sources. In the process of research and development of fuel cells, catalysts are one of the most critical and waiting for breakthrough b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCH01M4/92Y02E60/50
Inventor 周新文杜娟娟张荣华杨翼罗来明代忠旭
Owner CHINA THREE GORGES UNIV
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