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Gold cluster preparation method and application of gold cluster to catalysis of CO2 reaction

A technology of atomic clusters and atoms, which is applied in the field of preparation of gold atomic clusters and catalyzed CO2 reaction, to achieve the effect of high atom economy and small size

Active Publication Date: 2019-11-08
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Summarizing the literature results on the preparation of supported gold cluster catalyst materials for many years, it can be found that there is no method to prepare a supported gold cluster catalyst material with a controllable number of gold atoms and a controllable content, and its catalytic performance Application in the reaction of converting CO2 to basic chemicals

Method used

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  • Gold cluster preparation method and application of gold cluster to catalysis of CO2 reaction
  • Gold cluster preparation method and application of gold cluster to catalysis of CO2 reaction
  • Gold cluster preparation method and application of gold cluster to catalysis of CO2 reaction

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Embodiment 1

[0037] First, 0.050 grams of tetrachloroauric acid (HAuCl 4 ·3H 2O) was dissolved in 5 milliliters of water, then added to a toluene solution of 10 milliliters of tetraoctyl ammonium bromide (TOAB, 0.087 g; toluene, 10 milliliters), the two-phase solution was vigorously stirred for 10 minutes, the aqueous phase was removed, and 0.100 g of triphenylphosphine (PPh 3 ) into the toluene phase. 5 mL of freshly prepared NaBH 4 ethanol solution (NaBH 4 , 0.0204 g; ethanol, 5 ml) was added quickly, and after stirring for 3.5 hours, the toluene was evaporated to dryness and extracted with 10 ml of dichloromethane. To this extract was added 200 μl of phenethylmercaptan (C 6 h 5 CH 2 CH 2 SH), and then heated to 40 degrees, the reaction was carried out at 40 degrees for 6 hours. Then, 0.5 g of triphenylphosphine (PPh 3 ). The reaction was continued for 24 hours at 40°C. The solvent was evaporated to dryness, washed with hexane, and then extracted with toluene to obtain gold c...

Embodiment 2

[0041] First, 0.062 grams of tetrachloroauric acid (HAuCl 4 ·3H 2 O) was dissolved in 4.4 ml THF, and the solution was stirred in an ice bath for 30 minutes. Under vigorous stirring, 112 μl of phenethylmercaptan (C 6 h 5 CH 2 CH 2 SH) was added to the solution, then the stirring speed was reduced, and the stirring speed was increased after the solution was clarified. 1.5 mL of freshly prepared NaBH 4 Methanol solution (NaBH 4 , 0.06 g; water, 1.5 ml) was added quickly, and after stirring for 3 hours, the ice bath was removed, and the reaction was carried out overnight at room temperature. The solvent was evaporated to dryness, washed with ethanol, and extracted with dichloromethane to obtain gold clusters [Au 25 (PET) 18 ] precursor. Take 0.01 g of the precursor and dissolve it in 0.5 ml of toluene, add 500 microliters of 4-tert-butylthiophenol (TBBT) to the solution, and react at 80 degrees for two hours. The solution was then evaporated to dryness, washed, and ext...

Embodiment 3

[0044] First, 0.100 grams of tetrachloroauric acid (HAuCl 4 ·3H 2 O) was dissolved in 5 ml of water, then added to a toluene solution of 10 ml of tetraoctylammonium bromide (TOAB, 0.200 g; toluene, 10 ml), the two-phase solution was vigorously stirred for 15 minutes, the aqueous phase was removed, and With vigorous stirring, 0.200 g of triphenylphosphine (PPh 3 ) into the toluene phase. 5 mL of freshly prepared NaBH 4 ethanol solution (NaBH 4 , 0.0204 g; ethanol, 5 ml) was added quickly, and after stirring for 3.5 hours, the toluene was evaporated to dryness and extracted with 12 ml of dichloromethane. To this extract was added 200 μl of phenethylmercaptan (C 6 h 5 CH 2 CH 2 SH), and then heated to 40 degrees, the reaction was carried out at 40 degrees for 6 hours. Then, 1.200 g of PPh was added to the solution 3 . The reaction was continued for 24 hours at 40°C. The solvent was evaporated to dryness, washed with hexane, and then extracted with toluene to obtain go...

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Abstract

The invention provides a load-type gold cluster catalyst for catalytic conversion of CO2 prepared basic chemicals. In a gold cluster, the number of gold atoms is 9, 11, 23, 24, 25, 28 and 38, the masscontent of the gold cluster is 0.1 wt%-3 wt%, and a carrier is transition metal oxide. The load-type gold cluster catalyst has the beneficial effects that common chloroauric acid and organic amine are utilized as reactants and the metal oxide carrier is utilized, through chemical coordination and reduction and a ultrasonic load method, thus the load-type gold cluster catalyst material is prepared, the gold content is adjustable in the certain range, and different catalysis properties can be achieved when different carriers are loaded, for example, the load-type gold cluster catalyst materialshows excellent catalytic performance in the aspect of catalytic conversion of the CO2 prepared basic chemicals. The load-type gold cluster catalyst material has many advantages and can be subjected to industrial mass production. In the catalyst of a method, the content of gold is small, the efficiency is high, the cost is low, and environment pollution is small. The invention discloses a preparation method of the load-type gold cluster catalyst.

Description

Technical field: [0001] The invention relates to a supported gold atom cluster catalyst material and its preparation method and its application in catalytic conversion of CO2 to prepare basic chemicals. Background technique: [0002] Due to the extensive use of fossil fuels, the concentration of carbon dioxide in the atmosphere is increasing year by year. Relevant studies have shown that since the industrial revolution, the concentration of carbon dioxide in the atmosphere has 2 Concentrations have risen from 280ppm to 355ppm. CO 2 One of the main gases responsible for the greenhouse effect, CO 2 Excessive emissions into the atmosphere have had a serious impact on the global environment. H from renewable energy sources 2 with CO 2 The reaction produces basic chemicals, so that CO2 can be utilized as a resource, which can not only alleviate the greenhouse effect, but also reduce the dependence on petroleum resources in the production of chemical industry. due to CO 2 T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/24B01J31/22B01J23/52B01J37/06B01J37/34B01J37/16B01J37/03C07C41/01C07C43/04C07C29/154C07C31/04
CPCB01J31/2404B01J31/226B01J23/52B01J37/06B01J37/343B01J37/16B01J37/03C07C41/01C07C29/154B01J2531/18C07C43/043C07C31/04Y02P20/52
Inventor 祝艳蔡潇陈名扬丁维平
Owner NANJING UNIV
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