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Preparation method of cuprous sulfide nanowire array efficient oxygen evolution catalyst of interface

A technology of nanowire array and cuprous sulfide, which is applied in the field of preparation of electrocatalytic oxygen evolution materials, can solve the problems of low intrinsic catalytic activity and poor surface electrochemical properties, so as to help electron transport and catalyze oxygen evolution Improvement of performance and improvement of electrical conductivity

Inactive Publication Date: 2020-12-25
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to overcome the shortcomings of low intrinsic catalytic activity of general sulfide oxygen evolution catalysts due to poor surface electrochemical properties. 2 S-CoO x interface, optimized for Cu 2 Electrochemical properties of the S interface to enhance its intrinsic catalytic activity

Method used

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  • Preparation method of cuprous sulfide nanowire array efficient oxygen evolution catalyst of interface
  • Preparation method of cuprous sulfide nanowire array efficient oxygen evolution catalyst of interface
  • Preparation method of cuprous sulfide nanowire array efficient oxygen evolution catalyst of interface

Examples

Experimental program
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Effect test

example 1

[0030] (1).NaOH (2 g) and (NH 4 ) 2 S 2 o 8 (456 mg) dissolved in 20 mL of deionized water, cut a piece of 2 × 3 cm 2 Copper foam (CF) was pretreated with 3 M dilute hydrochloric acid, deionized water and absolute ethanol for 15 min by ultrasonication;

[0031] (2).Reaction at room temperature: immerse the treated CF in step (1) into the solution prepared in step (1), and let it react at room temperature for 20 min;

[0032] (3). Washing and drying: After the reaction in step (2) was completed, the CF covered with the blue substance was taken out, washed with deionized water and absolute ethanol for 3 times, and then vacuum-dried at 60 °C for 6 h. Produce Cu(OH) 2 / CF Precursor;

[0033] (4). Preparation: Na 2 S·9H 2 O (180 mg) was sonicated in 20 mL of absolute ethanol;

[0034] (5). Ion exchange reaction: the Cu(OH) prepared in step (3) 2 / CF precursor was immersed in the solution in step (4), and allowed to react at room temperature for 2 h;

[0035] (6). Washing...

example 2

[0040] (1).NaOH (2 g) and (NH 4 ) 2 S 2 o 8 (456 mg) dissolved in 20 mL of deionized water, cut a piece of 2 × 3 cm 2 Copper foam (CF) was pretreated with 3 M dilute hydrochloric acid, deionized water and absolute ethanol for 15 min by ultrasonication;

[0041] (2).Reaction at room temperature: immerse the treated CF in step (1) into the solution prepared in step (1), and let it react at room temperature for 20 min;

[0042] (3). Washing and drying: After the reaction in step (2) was completed, the CF covered with the blue substance was taken out, washed with deionized water and absolute ethanol for 3 times, and then vacuum-dried at 60 °C for 6 h. Produce Cu(OH) 2 / CF Precursor;

[0043] (4). Preparation: Na 2 S·9H 2 O (180 mg) was sonicated in 20 mL of absolute ethanol;

[0044] (5). Ion exchange reaction: the Cu(OH) prepared in step (3) 2 / CF precursor was immersed in the solution in step (4), and allowed to react at room temperature for 2 h;

[0045] (6). Washing...

example 3

[0050] (1).NaOH (2 g) and (NH 4 ) 2 S 2 o 8 (456 mg) dissolved in 20 mL of deionized water, cut a piece of 2 × 3 cm 2 Copper foam (CF) was pretreated with 3 M dilute hydrochloric acid, deionized water and absolute ethanol for 15 min by ultrasonication;

[0051] (2).Reaction at room temperature: immerse the treated CF in step (1) into the solution prepared in step (1), and let it react at room temperature for 20 min;

[0052] (3). Washing and drying: After the reaction in step (2) was completed, the CF covered with the blue substance was taken out, washed with deionized water and absolute ethanol for 3 times, and then vacuum-dried at 60 °C for 6 h. Produce Cu(OH) 2 / CF Precursor;

[0053] (4). Preparation: Na 2 S·9H 2 O (180 mg) was sonicated in 20 mL of absolute ethanol;

[0054] (5). Ion exchange reaction: the Cu(OH) prepared in step (3) 2 / CF precursor was immersed in the solution in step (4), and allowed to react at room temperature for 2 h;

[0055] (6). Washing...

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Abstract

The invention discloses a preparation method of a Cu2S-CoOx / CF efficient oxygen evolution catalyst with a Cu2S-CoOx interface. According to the invention, foamy copper, sodium hydroxide and ammonium persulfate are used as raw materials, Cu(OH)2 / CF with nanowire array characteristics is prepared firstly, then Cu(OH)2 / CF is converted into a Cu2S / CF precursor through ion exchange by using sodium sulfide nonahydrate as a sulfur source and absolute ethyl alcohol as a solvent, then cobalt nitrate hexahydrate and absolute ethyl alcohol are used for preparing a metal precursor solution, the Cu2S / CF precursor is uniformly coated with a certain amount of metal precursor, finally, annealing is conducted in the argon atmosphere, the Cu2S-CoOx / CF nanowire array oxygen evolution catalyst with the Cu2S-CoOx interface is obtained, the Cu2S-CoOx interface optimizes the electrochemical property of a catalytic material, and the catalyst shows good oxygen evolution activity (eta 25 mA cm<-2> = 255 mV) inan alkaline solution and is far superior to a Cu2S / CF oxygen evolution catalyst without the Cu2S-CoOx interface.

Description

technical field [0001] The invention relates to the field of preparation of electrocatalytic oxygen evolution materials, in particular to a preparation method of a cuprous sulfide nanowire array oxygen evolution catalyst with a sulfide-oxide interface. Background technique [0002] Hydrogen is an efficient and clean energy fuel, and the development of energy-saving and environmentally friendly hydrogen preparation methods is crucial to the promotion and use of hydrogen. Compared with the water gas synthesis method and petroleum cracking method, the electrolytic water hydrogen production method has the advantages of sustainable raw materials and clean process. However, water electrolysis is limited by the oxygen evolution reaction at the anode, so it is necessary to develop efficient and cheap oxygen evolution catalysts. [0003] Transition metal oxides, hydroxides, phosphides, and sulfides have been widely explored as oxygen evolution catalysts ( Science, 2017, 355, eaad49...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J37/12B01J37/30B01J37/06B01J37/08B82Y30/00B82Y40/00C25B11/06C25B1/04
CPCB01J27/04B01J37/12B01J37/30B01J37/06B01J37/082B82Y30/00B82Y40/00C25B1/04B01J35/33Y02E60/36
Inventor 姚亚东官鑫孙迅
Owner SICHUAN UNIV
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