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Ferro-nickel diselenide, as well as preparation method and application thereof

A compound, diselenide technology, which is applied to electrodes, electrolytic inorganic material coating, electrolysis process, etc., can solve the problems of difficulty in simultaneously realizing the catalytic stability and catalytic activity of hydrogen production and oxygen production, and achieves good uniformity and simple preparation process. , the effect of shortening the reaction time

Active Publication Date: 2018-11-16
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Ferro-nickel diselenide, as well as preparation method and application thereof
  • Ferro-nickel diselenide, as well as preparation method and application thereof
  • Ferro-nickel diselenide, as well as preparation method and application thereof

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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 foamed nickel, 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 ...

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Abstract

The invention provides ferro-nickel diselenide, as well as a preparation method and application thereof. The ferro-nickel diselenide is a polyhedral nanocrystal and has a chemical formula as NixFe1-xSe2, wherein the value of X is 0.5. A Ni2Fe(OH)7 compound is prepared on a foamed nickel substrate through an electrodeposition method, and the reaction time only needs hundreds of seconds compared with the time required for a traditional hydrothermal method, so that the reaction time is greatly shortened; and the preparation process is simple and easy to implement, large-area preparation can be realized, a substrate covering the Ni2Fe(OH)7 compound can be prepared at a time, and foamed nickel is subject to selenylation through a solvent thermal selenization method so as to obtain the ferro-nickel diselenide which shows favorable hydrogen generation and oxygen generation 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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IPC IPC(8): C25B1/04C25B11/06C25D9/04
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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