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A kind of nickel-iron diselenide compound and its preparation method and application

A compound and combined selenium technology, applied in the direction of electrolytic components, electrodes, electrolytic inorganic material coatings, etc., can solve the problems that it is difficult to realize the catalytic stability and catalytic activity of hydrogen and oxygen production at the same time, achieve good uniformity and shorten the reaction time , The effect of simple preparation process

Active Publication Date: 2021-03-19
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and insufficiencies of existing electrocatalysts that are difficult to simultaneously realize the catalytic stability and catalytic activity of hydrogen production and oxygen production, and provide a nickel-iron diselenide compound, which can react with the same electrolyte Both hydrogen production and oxygen production reactions have good catalytic activity and stability

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  • A kind of nickel-iron diselenide compound and its preparation method and application
  • A kind of nickel-iron diselenide compound and its preparation method and application
  • A kind of nickel-iron diselenide compound and its preparation method and application

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Embodiment 1~12

[0055] A nickel-iron diselenide compound, the chemical formula of the nickel-iron diselenide compound is NixFe1-xSe 2 . The preparation method of nickel-iron diselenide compound is:

[0056] S1. With Fe(NO 3 ) 3 9H 2 O and Ni(NO 3 ) 2 ·6H 2 O as the source of iron and nickel, Fe(NO 3 ) 3 9H 2 O and Ni(NO 3 ) 2 ·6H 2 The molar ratio of O is 1:1, and Ni is grown on the foamed nickel substrate by electrodeposition. 2 Fe(OH) 7 Compound, prepared to get Ni 2 Fe(OH) 7 Covered nickel foam, the electrodeposition method is reacted by the electrochemical workstation (Shanghai Chenhua Instrument Co., Ltd., CHI 660E). The place in the electrochemical workstation is the dried nickel foam as the working electrode, Ag / AgCl (3M KCl) The electrode is used as a reference electrode, and the platinum plate electrode is used as a counter electrode;

[0057] S2. Ni prepared from S1 2 Fe(OH) 7 The covered foam nickel, selenium powder, NaOH, N, N-dimethylformamide, and hydrazine hy...

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Abstract

The invention provides a nickel-iron diselenide compound and its preparation method and application. The nickel-iron diselenide compound is a polyhedral nanocrystal with a chemical formula of Ni x Fe 1‑x Se 2 , where the value of X is 0.5. The present invention prepares Ni on the foamed nickel substrate by electrodeposition 2 Fe(OH) 7 Compared with the time required by the traditional hydrothermal method, the reaction time is only a few hundred seconds, which greatly shortens the reaction time. The preparation process is simple and easy, and it can be prepared in a large area. 2 Fe(OH) 7 The base of the compound, and then selenize the nickel foam by solvothermal selenization to obtain a nickel-iron diselenide compound, which shows good hydrogen and oxygen production performance.

Description

technical field [0001] The invention relates to the field of electrocatalytic nanomaterials, more specifically, to a nickel-iron diselenide compound and its preparation method and application. Background technique [0002] In the 21st century, hydrogen is considered to be one of the most promising and cleanest renewable energy sources. Electrochemical water splitting has been extensively studied as a way to generate hydrogen, but large-scale electrochemical splitting of water into hydrogen and oxygen has been greatly hindered due to the low efficiency of the entire process. The efficiency of electrocatalysts directly depends on the properties of electrocatalysts, so electrocatalysts play a very important role in the development of high-efficiency electrochemical water splitting processes. For hydrogen production reactions, the most widely used catalysts are a class of noble metals including platinum and platinum-based materials, which often have extremely high current densi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/054C25B11/075C25B11/031C25B11/061C25D9/04
CPCC25B1/04C25B11/04C25D9/04Y02E60/36
Inventor 张璋胡先标程鹏飞周青伟苏绍强王新
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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