Platinum-nickel-iridium ternary ordered octahedral body and synthetic method thereof

A synthesis method, octahedral technology, applied in nanotechnology, nanotechnology, metal processing equipment and other directions for materials and surface science, can solve problems such as loss of catalytic activity of nickel, slow down corrosion and oxidation, improve service life, The effect of improving selectivity

Active Publication Date: 2018-11-06
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, nickel is relatively easy to be oxi...

Method used

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  • Platinum-nickel-iridium ternary ordered octahedral body and synthetic method thereof
  • Platinum-nickel-iridium ternary ordered octahedral body and synthetic method thereof
  • Platinum-nickel-iridium ternary ordered octahedral body and synthetic method thereof

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Embodiment 1

[0032] A platinum-nickel-iridium ternary ordered octahedron, the particles are 10-40nm particles, and the platinum is mainly distributed in the central area inside the particles, and the iridium is mainly distributed in the edge and corner areas.

[0033] The synthetic method of above-mentioned platinum-nickel-iridium ternary ordered octahedron comprises the following steps:

[0034] (1) Pipette 5 mL of oleylamine and 0 mL of oleic acid respectively, put the above substances in the same reactor, stir and mix evenly;

[0035] (2) Weigh 1 mg of platinum (II) acetylacetonate, 20 mg of nickel (II) acetylacetonate and 5 mg of iridium (III) acetylacetonate respectively, put them into the above mixed solution, stir, and dissolve evenly;

[0036] (3) The reactor is first vacuumed and degassed at room temperature, and then filled with argon to 1 atmospheric pressure. The above-mentioned vacuum degassed and argon filled operations are repeated 3 times, and finally the reactor is kept fu...

Embodiment 2

[0039] A platinum-nickel-iridium ternary ordered octahedron, the particles are 60-100nm particles, and the platinum is mainly distributed in the central area inside the particles, and the iridium is mainly distributed in the edge and corner areas.

[0040] The synthetic method of above-mentioned platinum-nickel-iridium ternary ordered octahedron comprises the following steps:

[0041] (1) Pipette 50 mL of oleylamine and 10 mL of oleic acid respectively, put the above substances in the same reactor, stir and mix evenly;

[0042] (2) Weigh 5 mg of platinum (II) acetylacetonate, 100 mg of nickel (II) acetylacetonate and 10 mg of iridium (III) acetylacetonate respectively, put them into the above mixed solution, stir, and dissolve evenly;

[0043] (3) The reactor is first vacuumized and degassed at room temperature, and then filled with argon to 1 atmospheric pressure. The above-mentioned vacuumized degassing and argon filling operations are repeated 6 times, and finally the react...

Embodiment 3

[0046] A platinum-nickel-iridium ternary ordered octahedron, the particles are 20-50nm particles, and the platinum is mainly distributed in the central area inside the particles, and the iridium is mainly distributed in the edge and corner areas.

[0047] The synthetic method of above-mentioned platinum-nickel-iridium ternary ordered octahedron comprises the following steps:

[0048] (1) Pipette 10 mL of oleylamine and 1 mL of oleic acid respectively, put the above substances in the same reactor, stir and mix evenly;

[0049] (2) Weigh 4 mg of platinum (II) acetylacetonate, 20 mg of nickel (II) acetylacetonate and 10 mg of iridium (III) acetylacetonate respectively, put them into the above mixed solution, stir, and dissolve evenly;

[0050] (3) The reactor is first vacuumed and degassed at room temperature, and then filled with argon to 1 atmospheric pressure. The above-mentioned vacuum degassed and argon filled operations are repeated 4 times, and finally the reactor is kept ...

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Abstract

The invention provides a platinum-nickel-iridium ternary ordered octahedral body and a synthetic method thereof, and relates to the field of materials. The particles of the platinum-nickel-iridium ternary ordered octahedral body are of a nano structure, moreover, the platinum is mainly distributed in the central region of the interior of each particle, the nickel is mainly distributed in eight face regions of the octahedral body, and the iridium is mainly distributed in an edge region and an angle region; the synthesis method comprises the following steps that 5-50 mL of oleylamine and 0-10 mLof oleic acid are correspondingly weighed, the oleylamine and the oleic acid are put into a reactor to obtain a mixed solution; 1-5 mg of platinum acetylacetone (II), 20-100 mg of nickel acetylacetonate (II), 5-10 mg of iridium acetylacetone (III) are weighed correspondingly and put into the mixed solution, and dissolving and stirring uniformly are carried out; a reaction kettle is vacuumized tobe a vacuum state and degassing is carried out; and then carbon monoxide gas is introduced, the reaction temperature and the reaction time are controlled, and a black powdery product is obtained afterthe reaction is finished. The invention provides the platinum-nickel-iridium ternary ordered octahedral and the synthetic method thereof, and the conditions that an appearance, a crystal form and theelement distribution of the octahedral body are further analyzed.

Description

technical field [0001] The invention relates to the technical field of nanomaterial synthesis, in particular to a platinum-nickel-iridium ternary ordered octahedron and a synthesis method thereof. Background technique [0002] Nickel is a magnetic transition metal element. It is widely used as a catalyst in the hydrogenation of petrochemical industry and the synthesis of methane. The advantage is that it is not poisoned by hydrogen sulfide and sulfur dioxide. [0003] The surface of nickel nanoparticles synthesized by conventional methods usually has multiple crystal planes coexisting. However, the current study found that different crystal faces exhibit different catalytic selectivity and catalytic activity. Nickel octahedral particles with {111} facets exhibit higher catalytic selectivity and activity. In addition, nickel is relatively easy to be oxidized to nickel oxide and lose its catalytic activity. Iridium can effectively protect transition metals including nickel...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/26B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/26B22F1/0553B22F1/054
Inventor 杨涛殷丽斯丁欣然
Owner HUAIHAI INST OF TECH
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