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Preparation method for optimizing performance of porous dendritic Pt-Ru-Ni alloy nanoparticles

A technology of alloy nanoparticles and alloy nanoparticles, which is applied in the field of preparing porous dendritic Pt-Ru-Ni alloy nanoparticles by solvothermal synthesis, can solve the problems of easy poisoning and expensive Pt catalyst, and achieve high specific surface area, excellent Effects of durability and CO poisoning resistance

Inactive Publication Date: 2019-12-03
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems, the present invention solves the technical problems such as high price and easy poisoning existing in Pt catalysts, prepares porous dendritic Pt-Ru-Ni alloy nanoparticles, and improves the performance of Pt nanostructure catalysts

Method used

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  • Preparation method for optimizing performance of porous dendritic Pt-Ru-Ni alloy nanoparticles
  • Preparation method for optimizing performance of porous dendritic Pt-Ru-Ni alloy nanoparticles
  • Preparation method for optimizing performance of porous dendritic Pt-Ru-Ni alloy nanoparticles

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Experimental program
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Effect test

Embodiment 1

[0023] 8 mg Pt(acac) 2 , 6 mg Ni(acac) 2 , 2 mg Ru(acac) 3 , 9 ml of oleylamine and 1 ml of oleic acid were added to the beaker, then the mixed solution was sonicated for 10 min, and stirred for 30 min until the solution was clear; then 0.8 ml of formaldehyde was added while stirring, and the stirring was continued for 15 min. The mixture was transferred to a 20 ml reaction kettle, placed in an oven, and kept at 170 °C for 12 h. After the reaction, through ethanol centrifugal washing, freeze-drying and other processing steps, porous dendritic Pt 44 Ru 11 Ni 45 alloy nanoparticles. (Such as figure 2 shown).

Embodiment 2

[0026] 8 mg Pt(acac) 2 , 2 mg Ni(acac) 2 , 2 mg Ru(acac) 3 , 9 ml of oleylamine and 1 ml of oleic acid were added to the beaker, then the mixed solution was sonicated for 10 min, and stirred for 30 min until the solution was clear; then 0.8 ml of formaldehyde was added while stirring, and the stirring was continued for 15 min. The mixture was transferred to a 20 ml reaction kettle, placed in an oven, and kept at 170 °C for 12 h. After the reaction, through ethanol centrifugal washing, freeze-drying and other processing steps, porous dendritic Pt 63 Ru 15 Ni 22 alloy nanoparticles. (Such as Figure 5 shown).

[0027] Methanol (formic acid) electro-oxidation test: The anode electro-oxidation performance test is carried out on a CHI650D electrochemical workstation using a conventional three-electrode system. A saturated calomel electrode (SCE) was used as the reference electrode, a platinum wire was used as the counter electrode, and a glassy carbon electrode (GC) with a ...

Embodiment 3

[0029] 8 mg Pt(acac) 2 , 10 mg Ni(acac) 2 , 2 mg Ru(acac) 3 , 9 ml of oleylamine and 1 ml of oleic acid were added to the beaker, then the mixed solution was sonicated for 10 min, and stirred for 30 min until the solution was clear; then 0.8 ml of formaldehyde was added while stirring, and the stirring was continued for 15 min. The mixture was transferred to a 20 ml reaction kettle, placed in an oven, and kept at 170 °C for 12 h. After the reaction, through ethanol centrifugal washing, freeze-drying and other processing steps, porous dendritic Pt 34 Ru 9 Ni 57 alloy nanoparticles. (Such as Figure 6 shown).

[0030] Methanol (formic acid) electro-oxidation test: The anode electro-oxidation performance test is carried out on a CHI650D electrochemical workstation using a conventional three-electrode system. A saturated calomel electrode (SCE) was used as the reference electrode, a platinum wire was used as the counter electrode, and a glassy carbon electrode (GC) with a ...

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Abstract

The invention discloses a preparation method for optimizing performance of porous dendritic Pt-Ru-Ni alloy nanoparticles. Platinum acetylacetone, ruthenium acetylacetone and nickel acetylacetone are used as metal precursors, oleyamine is used as a solvent, oleyamine and oleic acid are used as surfactants, oleyamine and formaldehyde are used as reducing agents, and the porous dendritic Pt-Ru-Ni alloy nanoparticles with higher selectivity are synthesized through assistance of an oven. The method is easy to operate and has high repeatability and enriches the design idea of the Pt-based alloy nanoparticle catalyst. The obtained porous dendritic Pt-Ru-Ni alloy nanoparticles have high specific surface area and large pore capacity, improve and increase active sites and can fully utilize the active sites, show excellent durability and CO poisoning resistance and have wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional nanometer materials. Specifically, the present invention uses a solvothermal synthesis method to prepare porous dendritic Pt-Ru-Ni alloy nanoparticles. Background technique [0002] In the past few decades, environmental problems have become increasingly prominent and resources have been gradually depleted, and the demand for renewable fuel cells has become imminent. Methanol fuel cells are the most attractive power sources due to their renewable, high energy conversion efficiency, and low pollutant emissions. High-performance, low-cost catalysts are considered to be the key to restricting the wide application of direct methanol fuel cells. So far, the most promising anode catalyst for methanol oxidation is considered to be Pt. However, the high cost of Pt and the fact that commercial Pt-based catalysts are easily poisoned by CO produced during methanol oxidation greatly limit its applicatio...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/92
CPCH01M4/8652H01M4/8882H01M4/921Y02E60/50
Inventor 李彬生高道伟杨绍寒陈国柱
Owner UNIV OF JINAN
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