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Method for preparing monatomic catalyst by atomizing precursor

A technology of catalysts and precursors, which is applied in the field of preparation of single-atom catalysts by atomization of precursors. It can solve the problems of complex equipment requirements, poor adjustability, and low preparation volume, and achieve simple preparation methods, low cost, and meet the requirements of experimental diversification. Effect

Active Publication Date: 2019-11-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Based on the characteristics and deficiencies of various current methods for preparing single-atom catalysts, the purpose of the present invention is to provide a method for preparing single-atom catalysts by atomizing precursors to solve the problems of complicated operations, complex equipment requirements, few types, Problems such as poor tonality and low preparation volume

Method used

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  • Method for preparing monatomic catalyst by atomizing precursor
  • Method for preparing monatomic catalyst by atomizing precursor
  • Method for preparing monatomic catalyst by atomizing precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take a 500 ml clean beaker, add 400 ml deionized water, and dissolve 0.1 g of tetraammine platinum nitrate in 400 ml of deionized water. Prepare a clean glass plate (9 cm×9 cm size), weigh 1 g of alumina with a balance, and spread the alumina powder on the glass plate. Then place the spray head 20 cm above the glass plate, introduce the pre-dissolved precious metal salt solution into the spray head, turn on the power and turn on the switch, and start spraying the solution, which is sprayed onto the flat alumina surface of the glass plate.

[0045] Spray for about 1 minute, and stop spraying after power off. Turn on the infrared light, make the light shine on the glass plate covered with alumina, and stop the infrared light for about 1 minute. Then spray the solution for 1 min, and irradiate the infrared lamp for 1 min, and then cycle 100 times. (This power-on and power-off cycle process is automatically completed by a smart socket with programming)

[0046] Place the abov...

Embodiment 2

[0048] Take a 250 ml clean beaker, add 120 ml acetone, and dissolve 0.03 g platinum acetylacetonate in 120 ml acetone. Prepare a clean glass plate (9 cm ´ 9 cm size), weigh 1 g of zinc oxide with a balance, and spread the zinc oxide powder on the glass plate. Then place the spray head 20 cm above the glass plate, introduce the pre-dissolved precious metal salt solution into the spray head, turn on the power and turn on the switch to start spraying the solution and spray it on the flat zinc oxide surface of the glass plate.

[0049] Spray for about 2 minutes, and stop spraying after power off. Turn on the infrared light, make the light shine on the glass plate covered with zinc oxide, and stop the infrared light for about 2 minutes. Then spray the solution for 2 minutes, and irradiate the infrared lamp for 2 minutes, and so on for 50 times. (This power-on and power-off cycle process is automatically completed by a smart socket with programming)

[0050] Place the above-prepared m...

Embodiment 3

[0052] Take a clean 1000 ml beaker, add 800 ml of absolute ethanol, and dissolve 0.1 g of palladium chloride in 800 ml of absolute ethanol. Prepare a clean glass plate (9 cm ´ 9 cm size), weigh 1 g of magnesium oxide with a balance, and spread the magnesium oxide powder on the glass plate. Then place the spray head 20 cm above the glass plate, introduce the pre-dissolved precious metal salt solution into the spray head, turn on the power and turn on the switch to start spraying the solution and spray it onto the flat magnesium oxide surface of the glass plate.

[0053] Spray for about 1 minute, and stop spraying after power off. Turn on the infrared light, make the light shine on the glass plate covered with magnesium oxide, and stop the infrared light for about 1 min. Then spray the solution for 1 min, and irradiate the infrared lamp for 1 min, and repeat 200 times. (This power-on and power-off cycle process is automatically completed by a smart socket with programming)

[0054...

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Abstract

The invention discloses a method for preparing a monatomic catalyst by atomizing a precursor. The preparation method comprises the following steps: step 1, atomizing and spraying a metal salt solutionto surfaces of different carrier by adopting a spray head to obtain a monatomic catalyst precursor; 2, drying the obtained monatomic catalyst precursor under an infrared lamp; repeating the first step and the second step for a plurality of times, and then putting the monatomic catalyst precursor into a drying box over one night; and finally, carrying out high-temperature roasting on the fully dried monatomic catalyst precursor, and cooling to room temperature to obtain the corresponding monatomic catalyst. The metal salt is dispersed on the surfaces of different carriers by using a simple spraying method, and the metal content is regulated and controlled by regulating and controlling the weight ratio of the metal salt to the carriers; the metal monatomic species are regulated and controlled by regulating and controlling the species of different metal salts; different carriers are selected to regulate and control the types of the carriers; and by regulating and controlling roasting conditions, metal single atoms are tightly combined with defect sites of elements such as oxygen and nitrogen in the carriers, the preparation of the single-atom catalyst is realized.

Description

Technical field [0001] The invention relates to the field of material science and engineering technology, in particular to a method for preparing a single-atom catalyst by atomization of a precursor. Background technique [0002] In 2011, academician Zhang Tao of Dalian Institute of Chemical Technology and others first proposed the concept of single-atom catalysis and successfully prepared single-atom Pt / FeOx catalysts. In 2012, the E. Charles H. Sykes research group of Tufts University in the United States realized the dispersion of single-atom Pd on Cu(111) surface. In 2014, Bao Xinhe and academician research group of Dalian Institute of Chemical Technology prepared atomically dispersed Fe / SiO 2 , And important progress has been made in methane anaerobic production of ethylene and aromatization. And in 2016, Zheng Nanfeng's research group at Xiamen University synthesized Pd / TiO by a simple photochemical method. 2 Single atom dispersed catalyst, the catalyst has excellent activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/34B01J23/44B01J23/46B01J23/52B01J23/60B01J23/63B01J23/656B01J23/745B01J23/755B01J23/89
CPCB01J23/42B01J23/60B01J23/58B01J23/63B01J23/6562B01J23/8906B01J23/8913B01J23/468B01J23/52B01J23/44B01J23/755B01J23/745B01J23/34
Inventor 纪红兵何晓辉张浩何千
Owner SUN YAT SEN UNIV
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