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Platinum-rhodium-yttrium nanowire and preparation method and application thereof

A nanowire, platinum-rhodium technology, applied in the field of platinum-rhodium-yttrium nanowire and its preparation, can solve the problems of reducing catalyst activity and stability, platinum poisoning and the like

Active Publication Date: 2019-12-31
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of platinum catalysts catalyzing the oxidation reaction of alcohols, the intermediate CO generated will lead to platinum poisoning, thereby reducing the activity and stability of the catalysts.

Method used

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  • Platinum-rhodium-yttrium nanowire and preparation method and application thereof
  • Platinum-rhodium-yttrium nanowire and preparation method and application thereof
  • Platinum-rhodium-yttrium nanowire and preparation method and application thereof

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preparation example Construction

[0025] The invention provides a kind of preparation method of platinum rhodium yttrium nanowire, comprising the following steps:

[0026] The platinum source, rhodium source, yttrium acetylacetonate, hexahydroxymolybdenum, hexadecyltrimethylammonium chloride, reducing agent and organic solvent are mixed, and the hydrothermal reaction is carried out to obtain the platinum rhodium yttrium nanowire.

[0027] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0028] In the present invention, the platinum source is preferably platinum acetylacetonate and / or platinum tetrachloride; when the platinum source is platinum acetylacetonate and platinum tetrachloride, the present invention does not have any Special restrictions can be mixed according to any ratio.

[0029] In the present invention, the rhodium source is preferably rhodium acetylacetonate and / or rhodium trichloride;...

Embodiment 1

[0041] Mix 50mg of glucose, 20mg of cetyltrimethylammonium chloride, 10mg of molybdenum hexacarbonyl, 8mg of platinum acetylacetonate, 4mg of rhodium trichloride, 5mg of yttrium acetylacetonate and 20mL of oleylamine, sonicate for 20min until the mixture is uniform, and place on a stainless steel After the hydrothermal reaction (180°C, 4h) in the autoclave, add 30mL of cyclohexane and ethanol mixture (the volume ratio of cyclohexane and ethanol is 1:1) to the obtained product system, after ultrasonication for 5min , the obtained mixed solution is centrifuged (3500 rpm, 5min) to obtain a solid-phase product, and the solid-phase product is washed twice with a mixed solution of cyclohexane and ethanol to obtain a platinum-rhodium-yttrium nanowire;

[0042] The platinum-rhodium-yttrium nanowires were subjected to SEM testing and XRD testing respectively, and the test results were as follows: figure 1 and Figure 4 As shown, among them, figure 1 is the SEM image of the platinum r...

Embodiment 2

[0044] Mix 70mg of ascorbic acid, 25mg of cetyltrimethylammonium chloride, 15mg of molybdenum hexacarbonyl, 10mg of platinum acetylacetonate, 5mg of rhodium acetylacetonate, 6mg of yttrium acetylacetonate and 20mL of oleic acid, sonicate for 30min until the mixture is uniform, After carrying out hydrothermal reaction (180°C, 4h) in the reaction kettle, add 30mL of a mixture of cyclohexane and ethanol to the obtained product system (the volume ratio of cyclohexane and ethanol is 1:2), and after ultrasonication for 10min, The obtained mixed solution was centrifuged (4000 rpm, 10min) to obtain a solid phase product, and the solid phase product was washed twice with a mixed solution of cyclohexane and ethanol to obtain platinum rhodium yttrium nanowires;

[0045] The platinum-rhodium-yttrium nanowires were subjected to SEM test, TEM-line scan test and TEM-EDS test respectively, and the test results were as follows: figure 2 , Figure 5 with Figure 6 As shown, among them, fig...

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Abstract

The invention relates to the technical field of electrocatalytic materials, in particular to a platinum-rhodium-yttrium nanowire and a preparation method and application thereof. Cetylammonium chloride is used as a surfactant and a structure directing agent, Hexacarbonyl molybdenum is mixed with a platinum source, a rhodium source and yttrium acetylacetonate as a structure limiting agent and participates in the preparation process of the platinum-rhodium-yttrium nanowire, and a nanowire with a face-centered cubit structure with disordered atoms is obtained through combination of the hydrothermal reaction. The platinum-rhodium-yttrium nanowire prepared by the method has larger specific surface area, a large number of active sites and fast electron transmission efficiency so that the platinum-rhodium-yttrium nanowire has higher catalytic performance. Meanwhile, the platinum-rhodium-yttrium nanowire reduces the content of metal platinum and enhances the ability to resist CO poisoning in comparison with the metal platinum catalyst, and thus the ability of electrochemical catalytic methanol oxidation can be improved.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic materials, in particular to a platinum-rhodium-yttrium nanowire and a preparation method and application thereof. Background technique [0002] In recent years, due to the massive consumption of fossil fuels such as coal and oil, the global energy crisis has broken out, which has caused various ecological environment and resource shortages such as global warming. In order to alleviate this situation, fuel cells, as a new type of energy, have been widely studied because of their advantages such as high efficiency, various fuels, flexible mobility, and no pollution. Among them, the direct alcohol fuel cell is a very promising energy supply device, which converts chemical energy into electrical energy with the advantages of high efficiency and no environmental sensitivity. The alcohol oxidation reaction efficiency at the fuel cell anode depends on the reaction kinetics, and efficient electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/9008Y02E60/50
Inventor 高发明刘倩位阔赵奕淞杨云霞
Owner YANSHAN UNIV
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