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Branch and leaf type heterostructure complete water splitting catalyst and preparation method thereof

A heterogeneous structure and catalyst technology, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve problems such as difficult to ensure high performance and high stability, low stability, poor conductivity, etc., to improve electrolysis Effects of water properties, proper size, increased surface area and mass transfer capacity

Active Publication Date: 2021-11-02
ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing NiMoO 4 Combined with the NiFe-LDH branch-leaf catalyst, its remaining defects are poor electrical conductivity and low stability, making it difficult to ensure high performance and high stability at high current densities

Method used

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  • Branch and leaf type heterostructure complete water splitting catalyst and preparation method thereof
  • Branch and leaf type heterostructure complete water splitting catalyst and preparation method thereof
  • Branch and leaf type heterostructure complete water splitting catalyst and preparation method thereof

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Experimental program
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Embodiment 1

[0062] Embodiment 1. A method for preparing a stable and efficient branch-leaf heterostructure NiMo-P@CoFe-LDH total water splitting catalyst, the following steps are performed in sequence:

[0063] 1), NiMoO 4 Preparation of nanorods:

[0064] 1.1) Cut the nickel foam into a 2cm×4cm rectangle (thickness is about 0.5mm), and use hydrochloric acid (concentration: 3M), absolute ethanol and water to ultrasonically clean for a few minutes, take it out, and dry it in a vacuum oven at 60°C About 12h, spare.

[0065] 1.2), adding an appropriate amount of Ni(NO 3 ) 2 ·6H 2 O and Na 2 MoO 4 2H 2 O was dissolved in 50ml of deionized water and stirred evenly to obtain Ni(NO 3 ) 2 ·6H 2 O, Na 2 MoO 4 2H 2 O concentration is 0.05M mixed solution.

[0066] 1.3), immerse one foamed nickel sheet obtained in step 1.1) after cleaning and drying into the mixed solution obtained in step 1.2), and then transfer the whole to a hydrothermal kettle (polytetrafluoroethylene reactor), and...

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Abstract

The invention discloses a preparation method of a branch and leaf type heterostructure complete water splitting catalyst. The preparation method comprises the following steps: preparing a NiMoO4 nanorod by using a foamed nickel sheet; preparing a NiMo-P nanorod by using the NaH2PO2 nanorod and the NiMoO4 nanorod; mixing Co(NO3)2.6H2O, FeSO4.7H2O and water to form a solution, and deoxidizing the solution to obtain an electro-deposition solution; pouring the electrodeposition solution into an electrolytic tank, cutting the NiMo-P nanorod into small pieces, and performing deposition for 300 + / -60 s through a constant voltage method; and after deposition is finished, washing with water, and drying in vacuum to obtain the branch and leaf type heterostructure complete water splitting catalyst. The water electrolysis catalyst prepared by the invention not only has a unique branch and leaf type structure, but also has relatively high catalytic activity on HER and OER, and in addition, the catalyst has very good stability in a long-time water electrolysis test under relatively high current.

Description

technical field [0001] The invention relates to the field of high-efficiency preparation of electrolyzed water for clean and renewable hydrogen energy, in particular to a method for preparing a transition metal branch-leaf heterostructure catalyst in the field of high-performance and stable total water-splitting catalysts. Background technique [0002] In order to solve the problem of fossil energy consumption and the accompanying environmental pollution in the development of today's society, many studies are focusing on finding clean and sustainable energy forms. Hydrogen energy is a clean, efficient and sustainable form of energy, so it is considered to be a very promising energy source that is very helpful in solving today's energy and environmental problems. However, hydrogen energy can be produced sustainably by electrolysis of water, and the products in this way are easy to separate, so the obtained hydrogen is more pure, so it is an excellent method of hydrogen produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04C25D9/04C25D7/00B82Y30/00B82Y40/00C01G53/00
CPCC25B1/04C25D9/04C25D7/006B82Y30/00B82Y40/00C01G53/00C01P2004/03C01P2004/61Y02E60/36
Inventor 郭兴忠刘富王凡杨辉
Owner ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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