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Binary metal phosphide controlled by molybdenum trioxide (tungsten), preparation method and application

A binary metal, molybdenum trioxide technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve problems such as unrealized, and achieve the effect of increasing the contact area

Active Publication Date: 2019-05-24
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of CoMoO by Hydrothermal Method 4 / NiMoO 4 Columnar array structure, using the prepared columnar structure as a precursor to continue to modify into a porous columnar array structure has not yet been realized

Method used

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  • Binary metal phosphide controlled by molybdenum trioxide (tungsten), preparation method and application
  • Binary metal phosphide controlled by molybdenum trioxide (tungsten), preparation method and application
  • Binary metal phosphide controlled by molybdenum trioxide (tungsten), preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Surface cleaning of nickel foam:

[0045] The nickel foam was immersed in 0.1 M dilute hydrochloric acid, and ultrasonically oscillated in an ultrasonic cleaner for 30 minutes to remove the dense NiO film on the surface; then it was ultrasonically cleaned in deionized water. Then ultrasonically cleaned in acetone; finally cleaned in absolute ethanol. The cleaned nickel foam was dried in a vacuum oven at 60 °C for 6 h.

[0046] (2) Preparation of molybdenum-cobalt-nickel columnar precursor by hydrothermal method:

[0047] 0.002 M Ni(NO 3 ) 3 ·5H 2 O, 0.002 M Co(NO 3 ) 2 , 0.004 M Na 2 MoO 4 , 0.1 M NH 4 F was added to the reaction kettle, and magnetically stirred for 30 minutes to obtain a uniform solution; then, the cleaned foam nickel was added to the reaction kettle, and kept in an oven at 160°C for 10 hours; after natural cooling, a large amount of deionized water was used to Rinse off the remaining substances on the surface; dry in a vacuum oven at 60°C...

Embodiment 2

[0051] (1) Surface cleaning of nickel foam:

[0052] The nickel foam was immersed in 0.1 M dilute hydrochloric acid, and ultrasonically oscillated in an ultrasonic cleaner for 30 minutes to remove the dense NiO film on the surface; then it was ultrasonically cleaned in deionized water. Then ultrasonically cleaned in acetone; finally cleaned in absolute ethanol. The cleaned nickel foam was dried in a vacuum oven at 60 °C for 6 h.

[0053] (2) Preparation of tungsten-cobalt-nickel columnar precursor by hydrothermal method:

[0054] 0.002 M Ni(NO 3 ) 3 ·5H 2 O, 0.002 M Co(NO 3 ) 2 , 0.004 M Na 2 WO 4 , 0.1 M NH 4 F was added to the reaction kettle, and magnetically stirred for 30 minutes to obtain a uniform solution; then, the cleaned foam nickel was added to the reaction kettle, and kept in an oven at 160°C for 10 hours; after natural cooling, a large amount of deionized water was used to Rinse off the remaining substances on the surface; dry in a vacuum oven at 60°C fo...

Embodiment 3

[0058] (1) Surface cleaning of nickel foam:

[0059] The nickel foam was immersed in 0.1 M dilute hydrochloric acid, and ultrasonically oscillated in an ultrasonic cleaner for 30 minutes to remove the dense NiO film on the surface; then it was ultrasonically cleaned in deionized water. Then ultrasonically cleaned in acetone; finally cleaned in absolute ethanol. The cleaned nickel foam was dried in a vacuum oven at 60 °C for 6 h.

[0060] (2) Molybdenum-copper-nickel columnar precursor prepared by hydrothermal method:

[0061] 0.002 M Ni(NO 3 ) 3 ·5H 2 O, 0.002 M Cu(NO 3 ) 2 , 0.004 M Na 2 MoO 4 , 0.1 M NH 4 F was added to the reaction kettle, and magnetically stirred for 30 minutes to obtain a uniform solution; then, the cleaned foam nickel was added to the reaction kettle, and kept in an oven at 160°C for 10 hours; after natural cooling, a large amount of deionized water was used to Rinse off the remaining substances on the surface; dry in a vacuum oven at 60°C for 6...

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Abstract

The invention relates to a binary metal phosphide controlled by molybdenum trioxide (tungsten), a preparation method and application. According to the method, foam nickel is used as a matrix, a columnar precursor is prepared by means of a hydrothermal method at first, and then a MoO3-x-controlled columnar array structure with multiple pores in the surface is formed by means of a low-temperature phosphorization method. Amorphous MoO3-x and CoP / Ni5P4 heterojunctions exist in the structure and are beneficial to the activation of water molecules and the precipitation of hydrogen. In addition, thevertical porous columnar array structure can accelerate electrolyte permeation, facilitate exposure of more electrochemically active areas and promote gas desorption from the surface of a catalyst. The structure has a great potential application value in the field of electrocatalysis.

Description

technical field [0001] The invention relates to a binary metal phosphide regulated by molybdenum (tungsten) and its preparation method and application. Specifically, it is a function-oriented functional nanomaterial design and modification technology, and molybdenum is grown on a foamed nickel substrate by a hydrothermal method. A columnar precursor of cobalt and nickel, and low-temperature phosphating technology to prepare a porous columnar array structure. Background technique [0002] Because of the advantages of simple preparation process and equipment, and no pollution, electrochemical total water splitting is considered to be an ideal means to prepare high-purity hydrogen. Theoretical calculations and experimental results show that binary transition metal phosphides have good water electrolysis performance, which is mainly attributed to their good electrical conductivity, the alloy effect between binary metals, and the appropriate hydrogen adsorption energy. However, ...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/04C25B1/04
CPCY02E60/36
Inventor 杨大驰郑世政杜玲玲
Owner NANKAI UNIV
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