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Method for directly synthesizing Pt-Co bimetallic nanoparticles utilizing water phase and application

A bimetallic nano, pt-co technology, applied in the field of catalysis, can solve problems such as hindering metal sites and losing catalytic performance, and achieve the effect of wide application prospects

Inactive Publication Date: 2013-05-22
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing Pt-Co nanoparticles synthesis methods are mostly oil-phase synthesis, using oleic acid / oleylamine as a protective agent, which hinders the metal sites and makes them lose their catalytic performance.

Method used

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  • Method for directly synthesizing Pt-Co bimetallic nanoparticles utilizing water phase and application
  • Method for directly synthesizing Pt-Co bimetallic nanoparticles utilizing water phase and application
  • Method for directly synthesizing Pt-Co bimetallic nanoparticles utilizing water phase and application

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Embodiment 15

[0025] The synthesis of embodiment 15%Pt-Co nanoparticles

[0026] 0.042 g of platinum precursor salt potassium chloroplatinite and 0.586 g of cobalt precursor salt hydrated cobalt(II) acetylacetonate were dissolved in 40 mL of water, and 2.2 g of PVP was added at the same time. The mixture was transferred to a stainless steel reaction kettle and sealed well. Then fill the reaction kettle with 2MPa hydrogen, then stir rapidly and raise the temperature to 60°C, and reduce for 4 hours. Pt-Co bimetallic nanoparticles were obtained by magnetic separation.

Embodiment 210

[0027] The synthesis of embodiment 210%Pt-Co nanoparticles

[0028] 0.084 g of platinum precursor salt potassium chloroplatinite and 0.586 g of cobalt precursor salt hydrated cobalt(II) acetylacetonate were dissolved in 40 mL of water, and 2.2 g of PVP was added at the same time. The mixture was transferred to a stainless steel reaction kettle and sealed well. Then fill the reaction kettle with 2MPa hydrogen, then stir rapidly and raise the temperature to 60°C, and reduce for 4 hours. Pt-Co bimetallic nanoparticles were obtained by magnetic separation.

[0029] The particle size distribution of the synthesized 10% Pt-Co nanoparticles is as follows figure 2 As shown, the average particle size is 3.4±0.5nm. The specific structure of the 10% Pt-Co nanoparticles is as image 3 As shown, there are "cobalt monolayers grown on platinum particles" and "single-atom Pt-embedded Co nanoparticles" structures.

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Abstract

The invention discloses a method for directly synthesizing Pt-Co bimetallic nanoparticles utilizing a water phase and application thereof. The method comprises the following steps of: dissolving a platinum precursor salt and cobalt (II) acetylacetonate hydrate in water, and simultaneously adding polyvinylpyrrolidone to mix; and then placing a mixture in a sealed container, filling 1-3 MPa hydrogen, heating to 60-100 DEG C, and carrying out reduction reaction for 4-8 hours to obtain the Pt-Co bimetallic nanoparticles. The Pt-Co bimetallic nanoparticles are isolated through a magnetic field action so as to be used as a good catalyst for low-temperature water-phase Fischer-Tropsch synthesis, and the catalytic activity of the catalyst is greatly superior to that of the traditionally synthesized alloyed Pt-Co nanoparticles and the Pt-Co nanoparticles of a core-shell structure.

Description

technical field [0001] The invention relates to a method for directly synthesizing Pt-Co bimetallic nanoparticles with good low-temperature water-phase Fischer-Tropsch synthesis performance in water phase, and belongs to the field of catalysis. Background technique [0002] Fischer-Tropsch synthesis can convert coal, natural gas and other energy sources into valuable fuels and chemicals. It plays an important role in today's increasingly scarce petroleum resources and increasingly stringent refining of petroleum products. Fischer-Tropsch oil can be easily produced due to its high purity and high quality. Good supplement to existing refined oil. The main catalyst metals are Ru, Fe or Co, and Co is widely used in industrial Fischer-Tropsch synthesis because of its low price and high selectivity to heavy hydrocarbons. Traditional Fischer-Tropsch synthesis often needs to be above 200 ° C to achieve good activity and selectivity, such as Davis et al. using 1.0% Re-15% Co-Al 2 o...

Claims

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Application Information

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IPC IPC(8): B01J23/89C10G2/00C07C1/04
Inventor 寇元马丁王航
Owner PEKING UNIV
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