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a ni 2 p 4 o 12 Nanoparticle material and its preparation method and application

A nanoparticle and nanocrystal technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of increasing time cost and process complexity, complicated operation process, high carbon layer annealing, etc., and achieve good catalytic stability Good stability, good dispersibility and good crystallinity

Active Publication Date: 2020-01-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Cui et al. (Energy Environ.Sci.2015, 8, 1719) reported a kind of electrochemical delithiation to regulate lithium iron phosphate materials and their oxygen evolution activity. Among them, the electrochemical delithiation method needs to package and disassemble the battery. The operation process is complicated; Bao et al. (ACS Appl.Mater.Interface 2016,8,22534) reported a carbon layer coated Co 2 P 2 o 7 Nanocrystals have good catalytic activity and stability, but during the preparation process, the decomposition of the polymer to obtain the carbon layer requires a high annealing problem (750°C), which increases the cost
In addition, the catalytic materials prepared above are all in powder form and need to be spin-coated on the substrate to form electrodes, which increases time cost and process complexity

Method used

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  • a ni <sub>2</sub> p <sub>4</sub> o <sub>12</sub> Nanoparticle material and its preparation method and application
  • a ni <sub>2</sub> p <sub>4</sub> o <sub>12</sub> Nanoparticle material and its preparation method and application
  • a ni <sub>2</sub> p <sub>4</sub> o <sub>12</sub> Nanoparticle material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of Ni 2 P 4 o 12 The preparation method of nano particle material, comprises the following steps:

[0035]Step 1: Add nickel chloride hexahydrate and ammonium persulfate into deionized water at a molar ratio of 4:1, and mix evenly by ultrasonic to obtain a mixed solution A, and then add ammonia water to the mixed solution A to obtain a mixed solution B; Wherein, the concentration of Ni source is 0.25mol / L, and the volume ratio of mixed liquid A and ammonia water is 16:1;

[0036] Step 2: Put the carbon cloth into the mixture B prepared in step 1, and let it stand for 20 minutes for Ni(OH) 2 The growth of the nanosheet precursor, then take it out and wash it, and dry it naturally;

[0037] Step 3: Load Ni(OH) obtained in step 2 2 Put the carbon cloth into the heating center of the quartz tube, and place 1g of sodium hypophosphite containing crystal water in the upstream area of ​​the quartz tube, 15cm away from the heating center;

[0038] Step 4: Vacuumize ...

Embodiment 2

[0043] Prepare Ni according to the steps of Example 1 2 P 4 o 12 For nanoparticle materials, only adjust the holding time of step 5 to 10 minutes, and keep other steps unchanged. The Ni that embodiment 2 prepares 2 P 4 o 12 The XRD diffraction patterns of nanoparticles are as follows: Figure 4 shown.

Embodiment 3

[0045] Prepare Ni according to the steps of Example 1 2 P 4 o 12 For nanoparticle materials, only adjust the amount of sodium hypophosphite containing crystal water in step 3 to 0.1 g, adjust the holding time at 300° C. in step 5 to 0 min, and keep other steps unchanged. The Ni that embodiment 3 prepares 2 P 4 o 12 The XRD diffraction pattern of the nanoparticle electrode is as follows Figure 4 shown.

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Abstract

A kind of Ni 2 P 4 o 12 The nano particle material and its preparation method belong to the technical field of catalyst preparation. Ni of the present invention 2 P 4 o 12 The nanoparticle material has a multi-level nanostructure, and the nanocrystals of 5-10nm are modified on the network-shaped interconnected nanoparticles of about 100nm. This structure provides a great active site for the oxygen evolution reaction in electrolyzed water, and is beneficial to the Molecular adsorption, theoretical studies have confirmed that the exposed crystal faces of nanocrystals have very low adsorption energy for water molecules and oxygen intermediates.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a Ni 2 P 4 o 12 Nanoparticle material and its preparation method, and its application in catalytic oxygen evolution reaction. Background technique [0002] The energy and environmental problems brought about by the rapid economic development are increasingly restricting the sustainable development of society. Due to environmental problems such as high carbon emissions of traditional fossil energy, the research and development of clean and renewable energy that can replace traditional fossil energy appears to be particularly important. Among them, hydrogen has become one of the most potential clean energy sources due to its advantages of no pollution, high energy density, and abundant sources, and its preparation technology has also attracted extensive attention from researchers. As the simplest and most mature hydrogen production method, electrolysis of water is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/37B82Y40/00B82Y30/00H01M4/58
CPCB82Y30/00B82Y40/00C01B25/37C01P2002/72C01P2004/03C01P2004/04C01P2004/30C01P2004/50C01P2004/64H01M4/5825Y02E60/10
Inventor 熊杰李岚黄建文邬春阳胡凯杜新川
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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