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High-load platinum-nickel ordered intermetallic compound and its preparation method and use

An intermetallic compound, platinum-nickel technology, applied in the field of preparation of high-load platinum-nickel ordered intermetallic compounds, can solve the problems of poor stability, high price, reduced catalyst activity, etc., achieve high dispersion, reduce dosage, improve active effect

Active Publication Date: 2018-11-09
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently platinum as a cathode catalyst has the following problems: (1) Platinum resources are scarce and expensive; (2) Oxygen reduction activity needs to be improved; (3) Platinum has poor resistance to methanol poisoning; (4) Poor stability
However, during the high-temperature treatment of high-metal-loaded catalysts, the catalyst nanoparticles are easy to agglomerate and grow, which greatly reduces the catalyst activity.

Method used

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  • High-load platinum-nickel ordered intermetallic compound and its preparation method and use
  • High-load platinum-nickel ordered intermetallic compound and its preparation method and use
  • High-load platinum-nickel ordered intermetallic compound and its preparation method and use

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Embodiment 1

[0037] The invention provides a high-loaded platinum-nickel ordered intermetallic compound, the preparation process of which is as follows:

[0038](1) Measure 32 mL of 1 mg / mL graphene oxide (GO) aqueous dispersion in a 50 mL beaker, add 5 mg of sodium citrate dihydrate, and ultrasonically dissolve it completely for 10 min, then add 3 mL of acidic multi-walled carbon nanotubes ( MWCNTs) aqueous dispersion (containing 8 mg multi-walled carbon nanotubes).

[0039] (2) 80mg PtCl 4 and 70mg NiCl 2 ·6H 2 Dissolve O to a concentration of 0.5mol L in 10mL -1 In the ethylene glycol solution of sodium hydroxide, add 200mg of sodium glutamate sonication and dissolve in the above-mentioned ethylene glycol solution.

[0040] (3) Slowly stir the ethylene glycol solution prepared in step (2) into the graphene oxide (GO) dispersion prepared in step (1), and ultrasonically stir for 30 min at a temperature of 25°C. Then the above liquid was transferred to a 100mL polytetrafluoroethylene-...

Embodiment 2

[0048] The invention provides a high-loaded platinum-nickel ordered intermetallic compound, the preparation process of which is as follows:

[0049] (1) Measure 40 mL of 1 mg / mL graphene oxide (GO) aqueous dispersion into a 50 mL beaker, add 50 mg of sodium citrate dihydrate, and ultrasonically dissolve it completely for 30 min.

[0050] (2) 60mg PtCl 4 and 48mg NiCl 2 ·6H 2 O dissolved in 8mL to a concentration of 0.5mol L -1 In the ethylene glycol solution of sodium hydroxide, add 150mg of sodium glutamate sonication and dissolve in the above-mentioned ethylene glycol solution.

[0051] (3) Slowly stir the ethylene glycol solution prepared in step (2) into the graphene oxide (GO) dispersion prepared in step (1), and ultrasonically stir for 30 min at a temperature of 30°C. Then the above liquid was transferred to a 100mL polytetrafluoroethylene-lined reactor, and subjected to solvothermal reaction at 180°C for 12 hours to obtain a cylindrical black carbon hydrogel; washed...

Embodiment 3

[0059] The invention provides a high-loaded platinum-nickel ordered intermetallic compound, the preparation process of which is as follows:

[0060] (1) Measure 32 mL of 1 mg / mL graphene oxide (GO) aqueous dispersion in a 50 mL beaker, add 5 mg of sodium citrate dihydrate, and ultrasonically dissolve it completely for 10 min, then add 6 mL of acidic multi-walled carbon nanotubes ( MWCNTs) aqueous dispersion (containing 16 mg multi-walled carbon nanotubes).

[0061] In other embodiments of the present invention, if the mass of graphene oxide (GO) in the graphene oxide (GO) aqueous dispersion is less than that of multi-walled carbon nanotubes (MWCNTs) in the acidic multi-walled carbon nanotubes (MWCNTs) aqueous dispersion If the quality of sodium citrate dihydrate exceeds the quality of graphene oxide (GO) in the aqueous dispersion of graphene oxide (GO), the high-load platinum-nickel ordered intermetallic compound of the present invention cannot be prepared; 5 times the mass s...

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Abstract

The invention provides a high-loading platinum-nickel ordered intermetallic compound, which uses a three-dimensional porous carbon gel as a carrier and is prepared by the following method: a carbon carrier precursor dispersion containing graphene oxide, a Pt precursor The metal precursor solution of Ni precursor and Ni precursor, reducing agent and sodium citrate dihydrate are uniformly mixed, and then the hydrothermal reaction generates a carbon gel uniformly loaded with a high-loading platinum-nickel disordered alloy, and then heat treated in a reducing atmosphere. The carbon gel is formed to uniformly load high-loading platinum-nickel ordered intermetallic compounds. Compared with traditional high-loading Pt / C catalysts, this catalyst relatively reduces the amount of precious metal Pt, uses the synergy between metals to improve the activity of the catalyst, and uses the high dispersion of ordered metal nanoparticles to improve the stability of the catalyst. properties, the catalyst still maintains a high degree of dispersion characteristics after ordered heat treatment. The invention also discloses a preparation method of the compound. The invention also discloses the use of the compound.

Description

technical field [0001] The invention relates to a high-load platinum-nickel ordered intermetallic compound, in particular to a three-dimensional carbon gel-loaded high-load platinum-nickel ordered intermetallic compound. The invention also relates to a preparation method of a high-load platinum-nickel ordered intermetallic compound. The invention also relates to the use of a high-load platinum-nickel ordered intermetallic compound. Background technique [0002] With the continuous development of human society, the global energy crisis has gradually become prominent, and the direct use of fossil energy has caused serious pollution to the earth's environment, threatening the living quality of the earth's creatures. Therefore, it is imminent to develop a clean and efficient energy industry. Direct methanol fuel cell is a device that converts the chemical energy of fuel into electrical energy through an electrochemical reaction. Its fuel source is abundant, cheap, easy to store...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89
CPCB01J23/892B01J35/394B01J35/23
Inventor 杨辉王亚蒙邹志青黄庆红邹亮亮
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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