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Alloy nanocage catalyst, and preparation method and application thereof

A technology of alloy nano and catalyst, which is applied in the direction of nanotechnology, structural parts, electrical components, etc., and can solve unsatisfactory problems

Active Publication Date: 2019-11-12
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The improvement of the above catalysts is only carried out in a single aspect. Although the catalytic performance has been improved, it is still not ideal.

Method used

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  • Alloy nanocage catalyst, and preparation method and application thereof

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Embodiment 1

[0061] This embodiment provides an alloy nanocage catalyst and a preparation method thereof, the catalyst includes an alloy of a noble metal and a transition metal, the noble metal includes palladium, and the transition metal includes copper, wherein the mass fraction of the transition metal copper is 20wt %;

[0062] The catalyst has an octahedral hollow nano-cage structure with a particle diameter of 525nm and a wall thickness of 40nm.

[0063] The preparation method of described catalyst comprises the following steps:

[0064] (1) Disperse 20 mg of octahedral cuprous oxide with a particle size of 500 nm in 20 mL of water to form a dispersion liquid, add 130 mg of PVP, and stir for 10 min to obtain a mixed liquid;

[0065] (2) Adding 13.88mL of chloropalladic acid with a concentration of 10mM to the mixed solution obtained in step (1) to react, the reaction temperature is 30°C, and the reaction time is 20min to obtain a palladium-copper alloy;

[0066] (3) Add 1mmol acetic...

Embodiment 2

[0070] This embodiment provides an alloy nanocage catalyst and a preparation method thereof, the catalyst includes an alloy of a noble metal and a transition metal, the noble metal includes platinum, and the transition metal includes copper, wherein the mass fraction of the transition metal copper is 30wt %;

[0071] The catalyst has an octahedron hollow nano-cage structure with a particle diameter of 320nm and a wall thickness of 30nm.

[0072] The preparation method of described catalyst comprises the following steps:

[0073] (1) Disperse 50 mg of octahedral cuprous oxide with a particle size of 300 nm in 75 mL of water to form a dispersion liquid, add 100 mg of PVP, and stir for 15 min to obtain a mixed liquid;

[0074] (2) Adding 40mL of chloroplatinic acid with a concentration of 15mM to the mixed solution obtained in step (1) to react, the reaction temperature is 20°C, and the reaction time is 30min to obtain a platinum-copper alloy;

[0075] (3) Add 5mmol hydrochlori...

Embodiment 3

[0079] This embodiment provides an alloy nanocage catalyst and a preparation method thereof. The catalyst includes an alloy of a noble metal and a transition metal, the noble metal includes palladium and ruthenium, and the transition metal includes copper, wherein the mass fraction of the transition metal copper is is 10wt%;

[0080] The catalyst has an octahedral hollow nano-cage structure with a particle diameter of 780nm and a wall thickness of 50nm.

[0081] The preparation method of described catalyst comprises the following steps:

[0082] (1) Disperse 70 mg of octahedral cuprous oxide with a particle size of 750 nm in 20 mL of water to form a dispersion, add 160 mg of PVP, and stir for 20 minutes to obtain a mixed solution;

[0083](2) in the mixed solution that step (1) obtains, add the chloropalladic acid and chlororuthenic acid mixed solution 80mL that concentration is 2mM, wherein, chloropalladic acid and chlororuthenic acid volume ratio are 1:1, react, so Said re...

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Abstract

The invention provides an alloy nanocage catalyst, and a preparation method and an application thereof. The catalyst comprises an alloy of noble metal and transition metal, wherein the noble metal includes any one or a combination of at least two of palladium, ruthenium, platinum, gold, rhodium, osmium and iridium; the transition metal includes copper; and the catalyst is of a hollow nanocage structure. According to the catalyst, the transition metal part is used for replacing the noble metal to form the alloy, so that the usage amount of the noble metal is reduced, the noble metal and the transition metal have a synergistic effect, an electronic structure is optimized, and the catalyst stability is enhanced; the catalyst has an octahedral hollow cage-like structure and is stable in structure and large in specific surface area, the usage amount of the noble metal is small, the catalyst cost is greatly reduced, and the application prospect is good; the catalyst is applied to the fuel cell positive catalysis; and the noble metal has the mass activity which can reach about 1,000mA mg<-1>, and the specific activity which can reach about 2.0mA cm<-2>.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to an alloy nanocage catalyst and its preparation method and application, in particular to an alloy nanocage catalyst, its preparation method and its application as a fuel cell anode catalyst. Background technique [0002] The energy problem is one of the major problems in today's society, and it is closely related to the survival of human beings. With the increasing shortage of fossil energy, the development of renewable energy and the effective use of energy are issues that we urgently need to solve. In addition, Energy storage is also one of the problems to be solved urgently, such as hydrogen energy, solar energy storage, etc. At present, various battery energy storage technologies are under research and development, and fuel cells have become a very Promising energy storage materials. [0003] However, the normal operation of fuel cells requires catalysts for catalysis, otherw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88B82Y40/00
CPCH01M4/921H01M4/9041H01M4/8825B82Y40/00Y02E60/50
Inventor 符显珠盛家利康佳慧盛国庆谢金麒孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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