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Gold cluster catalyst and method for producing same

A manufacturing method, technology of gold clusters, applied in catalyst activation/preparation, organic chemistry methods, chemical instruments and methods, etc., to achieve high selectivity

Active Publication Date: 2015-02-25
TOKYO METROPOLITAN PUBLIC UNIV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the synthesis of gluconic acid by CO oxidation at room temperature, the oxygen oxidation of glucose aqueous solution, the synthesis of hydrogen peroxide from hydrogen and oxygen, the one-pot synthesis of azobenzene from nitrobenzene, etc., palladium and platinum catalysts cannot high performance achieved

Method used

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  • Gold cluster catalyst and method for producing same
  • Gold cluster catalyst and method for producing same
  • Gold cluster catalyst and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] [Example 1] Preparation of a gold cluster catalyst with 11 gold atoms

[0115] (Synthesis of Chloro(triphenylphosphine)Au(I))

[0116] 1 g of chloroauric acid tetrahydrate was added to 35 mL of ethanol under a nitrogen atmosphere, and stirred and dissolved to obtain a chloroauric acid solution. 50 ml of an ethanol solution in which 1.364 g of triphenylphosphine was dissolved was added to the above-mentioned chloroauric acid solution under a nitrogen atmosphere to perform a reaction. The reaction solution changed from yellow to white, and a white precipitate was formed. The precipitate was dissolved in 5ml of dichloromethane, 120ml of pentane was slowly added, and it was stored overnight in a refrigerator to precipitate a white substance, which was filtered by suction and vacuum-dried to obtain the product (chloro(triphenylene) base phosphine) Au(I)).

[0117] (Au 11 Synthesis of gold cluster compounds)

[0118] 0.25 g of the obtained chloro(triphenylphosphine)Au(I)...

Embodiment 2

[0143] [Example 2] Preparation of a gold cluster catalyst with 55 gold atoms

[0144] A gold cluster catalyst was obtained in the same manner as in Example 1, except that Au clusters were prepared as follows. Phosphine protected Au 55 The electron micrographs of the clusters are shown in Figure 7 , the histogram representing the gold cluster size is shown in Figure 8 .

[0145] (Au 55 cluster synthesis)

[0146] Chloro(triphenylphosphine)Au(I) (0.25 g) prepared in the same manner as in Example 1 was added to 20 ml of benzene under a nitrogen atmosphere, and stirred and dissolved. Next, borane-tetrahydrofuran complex (THF) (BH 3 -THF complex) solution 3ml, and stirred to obtain the product. The product was added to 5 ml of a dichloromethane solution, filtered and dried. Slowly add pentane 120ml in this product, filter, dry, thereby obtain final product (Au 55 clusters).

Embodiment 3

[0147] [Example 3] Preparation of a gold cluster catalyst with 101 gold atoms

[0148] A gold cluster catalyst was obtained in the same manner as in Example 1, except that Au clusters were prepared as follows. Phosphine protected Au 101 The electron micrographs of the clusters are shown in Figure 9 , the histogram representing the gold cluster size is shown in Figure 10 .

[0149] (Au 101 cluster synthesis)

[0150] 50 ml of distilled water (a solution) in which chloroauric acid (2.54 mmol) was dissolved and 65 ml of toluene (b solution) in which tetraoctylammonium bromide (TOAB) (2.93 mmol) was dissolved were prepared. The prepared a solution and b solution were mixed under a nitrogen atmosphere for 30 minutes to perform a reaction. Since the gold salt generated by the reaction migrated from the water layer to the toluene layer, water was removed from this solution with a 50 ml syringe, and vigorously stirred at room temperature. After 30 minutes, triphenylphosphine ...

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Abstract

[Problem] To provide: a gold cluster catalyst which is capable of promoting / controlling a chemical reaction with high catalytic activity and selectivity; and a method for producing the gold cluster catalyst. [Solution] (1) A gold cluster catalyst that is obtained by having a carrier support clusters, each of which is an aggregate of a plurality of gold atoms, by having the carrier support a plurality of gold cluster compounds and then processing the gold cluster compounds on the carrier, each of said gold cluster compounds being stabilized by an organic ligand and comprising a predetermined number of gold atoms. This gold cluster catalyst is characterized in that each of the clusters has a particle diameter of 10 nm or less and is formed substantially only of gold atoms.

Description

technical field [0001] The present invention relates to a gold cluster catalyst, and more specifically, to a gold cluster catalyst capable of reacting with high selectivity. Background technique [0002] Solid catalysts were industrialized at the beginning of the 20th century, and then contributed to the development of inorganic chemicals, coal chemicals, and petrochemicals. When solid catalysts are roughly classified in the form of material systems, they fall into the following three types: metal sulfides used for hydrodesulfurization of petroleum, metal oxides used for selective oxidation of unsaturated hydrocarbons, and metals used for purifying automobile exhaust. Among them, noble metals can be used in both oxidation reactions and reduction reactions, and thus have high versatility. In particular, palladium and platinum are representative thereof. [0003] Gold is a particularly stable metal among noble metals, and it has been considered as a metal that lacks catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J23/66B01J35/02B01J37/08B01J37/34C07C29/141C07C33/32C07C209/36C07C211/46C07C245/12C07B61/00
CPCB01J35/006B01J37/08B01J23/52C07C245/08C07C29/141B01J35/02C07C209/36C07C33/32B01J35/0013B01J37/031B01J37/0211B01J23/66B01J37/34B01J37/349B01J37/0234B01J21/066B01J37/16B01J37/0018B01J37/0203B01J35/393B01J35/23C07C211/46B01J35/00B01J35/30B01J23/10Y02P20/52
Inventor 春田正毅干越黄家辉竹岁绚子石田玉青秋田知树尾形敦金贤夏
Owner TOKYO METROPOLITAN PUBLIC UNIV CORP
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