Preparation method and application of tellurium-based precious metal alloy nanowire catalyst

A technology of tellurium nanowires and alloy nanometers, which is applied in the field of catalyst preparation, can solve the problems of insufficient utilization of Te nanowires, failure to meet industrialization requirements, and limited applications, so as to reduce the amount of precious metals, prevent catalytic activity and stability from being reduced, The effect of reducing dosage

Inactive Publication Date: 2013-01-16
UNIV OF SCI & TECH OF CHINA
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  • Description
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Problems solved by technology

However, the synthesis methods of high-temperature oil phase and electrodeposition have low yields and cannot meet the requirements of industrialization
[0004] German "Advanced Functional Materials" (Advanced Materials, 2012, Issue 17, page 2326) reported the synthesis of PdPt and PdAu alloy nanowire catalysts by template sacrificial method. Substitution reacti

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  • Preparation method and application of tellurium-based precious metal alloy nanowire catalyst
  • Preparation method and application of tellurium-based precious metal alloy nanowire catalyst
  • Preparation method and application of tellurium-based precious metal alloy nanowire catalyst

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Example Embodiment

[0050] Example 1

[0051] Disperse 0.05mmol of the tellurium nanowires in 30mL of ethylene glycol solution and place them in an Erlenmeyer flask (50mL). 2 PtCl 4 (0.012mmol) and K 2 PdCl 4 (0.006mmol) of ethylene glycol solution 0.72mL, under the condition of magnetic stirring, stirring speed 300rpm, add dropwise (30 drops / min), after the addition is complete, put it into a shaker at 260rpm and 50 degrees Celsius Under the conditions, the reaction is 8 hours. Then 100mL acetone was added to the reaction system to extract the product, and the product was centrifuged and washed with ethanol three times to obtain the final sample Pt 26 Pd 15 Te 59 Nanowire catalyst.

[0052] To the Pt 26 Pd 15 Te 59 The nanowires were observed by transmission electron microscope, see the results figure 1 , 2 , figure 1 , 2 Pt provided by embodiment 1 of the present invention 26 Pd 15 Te 59 TEM photograph of nanowires, by figure 1 , 2 It can be seen that we have obtained a one-dimensional ultrafine nan...

Example Embodiment

[0053] Example 2

[0054] Disperse 0.05mmol of the tellurium nanowires in 30mL of ethylene glycol solution, put them in an Erlenmeyer flask (50mL), put the K 2 PtCl 4 (0.009mmol) and K 2 PdCl 4 (0.009mmol) of ethylene glycol dissolved in 0.72mL, under the condition of magnetic stirring, stirring speed 300rpm, add dropwise (30 drops / min), after the addition is complete, put it in a shaker at 260rpm and 50 degrees Celsius Under the conditions, the reaction is 8 hours. Then 100mL acetone was added to the reaction system to extract the product, and the product was centrifuged and washed with ethanol three times to obtain the final sample Pt 23 Pd 23 Te 54 Nanowire catalyst.

[0055] To the Pt 23 Pd 23 Te 54 The nanowires were observed by transmission electron microscope, see the results figure 1 , 2 , Figure 4 , 5 Pt provided by embodiment 2 of the present invention 23 Pd 23 Te 54 TEM photograph of nanowires, by Figure 4 , 5 It can be seen that we have obtained a one-dimensional ultr...

Example Embodiment

[0056] Example 3

[0057] Disperse 0.05mmol of the tellurium nanowires in 30mL of ethylene glycol solution, put them in an Erlenmeyer flask (50mL), put the K 2 PtCl 4 (0.006mmol) and K 2 PdCl 4 (0.012mmol) of ethylene glycol dissolved in 0.72mL, under the condition of magnetic stirring, stirring speed 300rpm, add dropwise (30 drops / min), after the addition is complete, put it in a shaker at 260rpm and 50 degrees Celsius Under the conditions, the reaction is 8 hours. Then 100mL acetone was added to the reaction system to extract the product, and the product was centrifuged and washed with ethanol three times to obtain the final sample Pt 15 Pd 33 Te 52 Nanowire catalyst.

[0058] To the Pt 15 Pd 33 Te 52 The nanowires were observed by transmission electron microscope, see the results figure 1 , 2 , Figure 7 , 8 Pt provided by Example 3 of the present invention 15 Pd 33 Te 52 TEM photograph of nanowires, by Figure 7 , 8 It can be seen that we have obtained a one-dimensional ultrafi...

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Abstract

The invention discloses an active template method for preparing a tellurium-based precious metal alloy nanowire catalyst. The active template method comprises the following steps of: (a) dispersing tellurium nanowires in a solvent in a ratio to obtain a tellurium nanowire dispersion liquid, and dissolving a precious metal precursor in the solvent to obtain a precious metal precursor solution; (b) adding the precious metal precursor solution obtained in the step (a) into the tellurium nanowire dispersion liquid obtained in the step (a) in a ratio with stirring to obtain a mixed solution of the precious metal precursor solution and the tellurium nanowire dispersion liquid; and (c) performing replacement reaction on the mixed solution obtained in the step (b) to obtain the tellurium-based precious metal alloy nanowire catalyst. The one-dimensional catalyst prepared by the method can serve as a self-support catalyst, effectively avoids defects of particle catalyst agglomeration and Ostwald curing, and avoids a defect of Pt loss caused by corrosion of an active carbon supported carrier. Meanwhile, by the method, the catalyst can be synthesized massively and the industrialization is realized.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a method for preparing a one-dimensional tellurium-based noble metal alloy nanowire catalyst using tellurium nanowire as an active template, the catalyst prepared by the method and the application of the method. Background technique [0002] Noble metals are the most effective fuel cell catalysts, but noble metals are rare metals and are very limited. Therefore, reducing the amount of noble metals while improving catalytic activity is a hot spot and challenge in current research. [0003] At present, precious metal alloys and heterogeneous structure catalyst materials are the most researched. While reducing the amount of precious metals and reducing costs, the activity and stability of the catalyst are greatly improved through the adjustment of the structure, the proportion of components, and the stress effect or coordination effect. performance, and is f...

Claims

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Application Information

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IPC IPC(8): B01J27/057H01M4/92B82Y30/00
CPCY02E60/50
Inventor 俞书宏李会会赵硕
Owner UNIV OF SCI & TECH OF CHINA
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