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A kind of pt-fe nano catalyst, its preparation method and application

A nano-catalyst, pt-fe technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of increasing material consumption, reducing the utilization rate of active metals, etc., and achieve high selectivity and high selectivity Good performance and catalytic activity

Active Publication Date: 2020-10-27
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduced ligands inevitably occupy or passivate active sites, reducing the utilization of active metals and increasing material consumption, especially these selective hydrogenation catalysts are mainly noble metals such as Pt, Pd, Rh, etc.

Method used

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  • A kind of pt-fe nano catalyst, its preparation method and application
  • A kind of pt-fe nano catalyst, its preparation method and application
  • A kind of pt-fe nano catalyst, its preparation method and application

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preparation example Construction

[0026] The invention provides a kind of preparation method of Pt-Fe nano catalyst, comprising:

[0027] A) prepare Pt-Fe nanowire; The preparation method of described Pt-Fe nanowire comprises:

[0028] Mix and heat platinum acetylacetonate, cetyltrimethylammonium chloride, dibenzyl ether and oleylamine, then mix and heat with dibenzyl ether solution of triiron dodecacarbonyl, cool, separate, wash and dry to obtain Pt- Fe nanowires;

[0029] B) Pt-Fe nanowires, solvent and activated carbon are mixed, stirred, centrifuged and washed to obtain a Pt-Fe nano catalyst loaded on the activated carbon.

[0030] The present invention first prepares Pt-Fe nanowires.

[0031] According to the present invention, the preparation method of the Pt-Fe nanowires comprises:

[0032] Platinum acetylacetonate, cetyltrimethylammonium chloride, dibenzyl ether and oleylamine are first mixed to obtain a homogeneous mixture.

[0033] Wherein, the weight-to-volume ratio of platinum acetylacetonate, ...

Embodiment 1

[0060] A Pt-Fe nano-catalyst, the catalyst includes Pt-Fe nano-wires with abundant high-index facets, loaded on activated carbon.

[0061] The preparation method of above-mentioned Pt-Fe nanometer catalyst comprises:

[0062] The obtained sample was purified by heating the Pt-Fe nanowires at 120° C. in air for 3 hours and keeping at 80° C. under vacuum for 3 hours. In a typical synthesis of Pt-Fe nanocrystals / C, the sample (20 mg) was dispersed in 10 mL of n-butanol in a 20 mL vial, followed by the addition of activated carbon (80 mg). The colloidal mixture was vigorously stirred for 4 hours, centrifuged at 11,000 rpm for 15 minutes to obtain a solid product, and then washed once with n-butanol.

[0063] The above-mentioned Pt-Fe nanowires are obtained by the following preparation method:

[0064] Will contain 11.8mg Pt(acac) 2 , a mixture of 288 mg CTAC, 1.5 mL BE and 2.5 mL OAm was charged into a 20 mL vial at room temperature. Transfer the solution to a 180 °C oil bath ...

Embodiment 2

[0069] A Pt-Fe nano-catalyst, the catalyst includes Pt-Fe nano-wires with abundant high-index faces, loaded on activated carbon.

[0070] The preparation method of above-mentioned Pt-Fe nanometer catalyst comprises:

[0071] The obtained sample was purified by heating the Pt-Fe nanowires at 120° C. in air for 3 hours and keeping at 80° C. under vacuum for 3 hours. In a typical synthesis of Pt-Fe nanocrystals / C, the sample (20 mg) was dispersed in 10 mL of n-butanol in a 20 mL vial, followed by the addition of activated carbon (80 mg). The colloidal mixture was vigorously stirred for 4 hours, centrifuged at 11,000 rpm for 15 minutes to obtain a solid product, and then washed once with n-butanol.

[0072] The above-mentioned Pt-Fe nanowires are obtained by the following preparation method:

[0073] Will contain 11.8mg Pt(acac) 2 , a mixture of 288 mg CTAC, 1.5 mL BE and 2.5 mL OAm was charged into a 20 mL vial at room temperature. Transfer the solution to a 180 °C oil bath f...

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Abstract

The present invention provides a method for preparing Pt-Fe nano-catalyst, including: preparing Pt-Fe nanowires; the method for preparing Pt-Fe nanowires includes: combining platinum acetylacetonate and cetyltrimethyl chloride Ammonium, dibenzyl ether and oleylamine are mixed and heated, and then mixed with the dibenzyl ether solution of triiron dodecacarbonyl, heated, cooled, separated, washed, and dried to obtain Pt‑Fe nanowires; Pt‑Fe nanowires, solvent and activated carbon Mixing, stirring, centrifuging, and washing to obtain Pt-Fe nano-catalyst supported on activated carbon. By controlling the reaction conditions, the present invention obtains Pt-Fe nanowires with rich and high index surfaces, and makes the size and length relatively uniform. In the selective hydrogenation of acetophenone, it can selectively hydrogenate only to acetophenone. The carbon-oxygen double bond is hydrogenated to avoid hydrogenation of the benzene ring or excessive hydrodeoxygenation, and a single phenethyl alcohol product can be obtained, and the extremely high selectivity of hydrogenation to obtain phenethyl alcohol is realized.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a Pt-Fe nanometer catalyst, its preparation method and application. Background technique [0002] The selective hydrogenation of special unsaturated groups has been widely used in chemical production, pharmaceutical synthesis, pesticides and dyes. During selective hydrogenation, substrate molecules will contain various unsaturated groups, such as carbonyl (C=O), aromatic rings, nitro groups, and carbon-carbon double bonds (C=C). Since all unsaturated groups have the potential to be hydrogenated, it is difficult to improve the selectivity of specific products. [0003] An effective approach to enhance selectivity is based on the steric effect, which enables the selective adsorption of specific unsaturated groups on the catalyst surface. For example, thiol-treated Pd nanosheets exhibited high selectivity (>97%) for the semihydrogenation of C≡C groups to 1-phenyl-1-propyne. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/02C07C29/145C07C33/22B01J35/00
Inventor 吴文龙韦淼今李润泽曾杰
Owner UNIV OF SCI & TECH OF CHINA