Preparation method and application of non-noble metal monoatomic catalyst

A non-precious metal and catalyst technology, applied in the fields of chemistry, chemical engineering and material science, to achieve the effects of low preparation cost, improved atom utilization and low cost

Active Publication Date: 2019-11-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of atomically dispersed non-noble metal coca

Method used

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  • Preparation method and application of non-noble metal monoatomic catalyst
  • Preparation method and application of non-noble metal monoatomic catalyst
  • Preparation method and application of non-noble metal monoatomic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1: Preparation of nickel single atom / cadmium sulfide nanorod composite catalyst

[0070] Prepare nickel single atom / cadmium sulfide composite catalyst according to the following method

[0071] (1) Take 20.25mmol of cadmium chloride 2.5 hydrate, 40.75mmol of thiourea and 60mL of ethylenediamine in a 100mL high-pressure reactor, and place the reactor in a 160°C oven for hydrothermal treatment for 48 hours. After the reaction, remove the reactor Put it under natural conditions and drop it to room temperature, filter to obtain a yellow solid, wash with deionized water 10 times, and wash with ethanol twice, and place the obtained solid in an oven at 60°C for 12 hours to obtain a yellow solid that is cadmium sulfide nanorods;

[0072] (2) Take 50mg of cadmium sulfide nanorods and place them in a 25mL single-necked flask, then add 1mL of nickel acetate aqueous solution (12.5mg / mL), 1mL of thiourea aqueous solution (38mg / mL) and 8mL of deionized water, ultrasonicall...

Embodiment 2

[0075] Example 2: Catalytic activity of nickel single atom / cadmium sulfide nanorod composite catalyst

[0076] Take 2 mg of cadmium sulfide obtained in step (1) of Example 1 and place it in a 100 mL photocatalytic reactor, then add 10 mL of lactic acid and 40 mL of water. Sonicate for 30s, use nitrogen degassing for 1h to remove oxygen in the system, place the round bottom flask under 300W xenon light (equipped with a 420nm cut-off filter) and irradiate, after the reaction is over, use thermal conductivity-gas chromatography to detect the generated in the reaction Hydrogen, the hydrogen production rate is 4.8mmol·g after 6 hours of reaction -1 h -1 .

[0077] Ni obtained in Example 1 1 2mg / CdS NRs composite catalyst was placed in a 100mL photocatalytic reactor, followed by adding 10mL lactic acid and 40mL deionized water. Sonicate for 30s, use nitrogen degassing for 1h to remove oxygen in the system, place the round bottom flask under 300W xenon light (equipped with a 420n...

Embodiment 3

[0082] (1) Take 20.25mmol of cadmium chloride 2.5 hydrate, 40.75mmol of thiourea and 60mL of ethylenediamine in a 100mL high-pressure reactor, and place the reactor in a 160°C oven for hydrothermal treatment for 48 hours. After the reaction, remove the reactor Put it under natural conditions and drop it to room temperature, filter to obtain a yellow solid, wash with deionized water 10 times, and wash with ethanol twice, and place the obtained solid in an oven at 60°C for 12 hours to obtain a yellow solid that is cadmium sulfide nanorods;

[0083] (2) Take 50mg of cadmium sulfide nanorods and place them in a 25mL single-necked flask, then add 1mL of nickel acetate aqueous solution (12.5mg / mL), 1mL of thiourea aqueous solution (38mg / mL), and 8mL of deionized water, ultrasonically disperse for 1min, and then Use nitrogen degassing for 40 minutes to remove oxygen in the reaction system;

[0084] (3) After the degassing is completed, place the round bottom flask under a 300W xenon ...

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Abstract

Belonging to the technical field of chemistry, chemical industry and material science, the invention discloses a preparation method and application of a non-noble metal monoatomic catalyst. The invention adopts cheap raw materials and simple method to prepare the monoatomic catalyst. In essence, under a lighting condition, a metal is anchored on a light absorption carrier in a monatomic state formto generate the monoatomic catalyst. The invention for the first time utilizes a photochemical synthesis route to prepare the transition metal monoatomic catalyst. The monoatomic catalyst synthesizedby method provided by the invention is dispersed on the surface of an optical active substance. Nickel single atom is adopted as the cocatalyst for photocatalytic decomposition of water to hydrogen,the price is low, and the catalytic efficiency is greatly improved. Compared with other types of non-noble metal modified composite photocatalysts, the non-noble metal monoatomic catalyst has higher photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method and application of a non-noble metal single-atom catalyst, belonging to the technical fields of chemistry, chemical engineering and material science. Background technique [0002] Global environmental pollution and energy crisis are becoming more and more serious, and the development of new sustainable energy has attracted the attention of countries all over the world. Among them, hydrogen is considered to be the most ideal energy source because of its abundant sources, high combustion value, and clean and pollution-free combustion products. Hydrogen production by splitting water is one of the important methods to achieve large-scale production of hydrogen. Using solar energy to decompose water to produce hydrogen, converting solar energy into chemical energy stored in hydrogen energy, provides a cheap and convenient way to obtain hydrogen, and in this technology, the development of cheap and efficient pho...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J27/043C01B3/04H01M4/90
CPCB01J27/24B01J27/043B01J35/004C01B3/042H01M4/9075C01B2203/0277C01B2203/1058Y02E60/36Y02E60/50C25B11/049C25B9/17C25B11/091C25B1/04C25B11/02H01M8/0656
Inventor 董玉明王光丽蒋平平张会珍蹇亮李激朱永法
Owner JIANGNAN UNIV
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