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Ni-w-p/cnts/cc catalytic electrode and its preparation method and application

A catalytic electrode, ni-w-p technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of easy peeling off of cured film, limited industrial application, poor working stability of catalytic electrodes, etc.

Active Publication Date: 2020-08-11
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high price and scarce reserves, its industrial application is greatly limited, so finding low-cost materials that can replace precious metals has become a research hotspot.
[0005] In addition, most of the catalytic materials are in the form of powder, which must be coated on the base electrode with a binder, because the presence of the binder will lead to an increase in electrode resistance, a decrease in active sites, and mask the diffusion channels of reactive ions, which is extremely difficult. Greatly reduces the apparent catalytic activity of the catalytic electrode material
At the same time, the adhesion of the adhesive itself is difficult to guarantee, and the cured film formed by it is easy to fall off during the electrolysis process, resulting in poor working stability of the catalytic electrode

Method used

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  • Ni-w-p/cnts/cc catalytic electrode and its preparation method and application
  • Ni-w-p/cnts/cc catalytic electrode and its preparation method and application
  • Ni-w-p/cnts/cc catalytic electrode and its preparation method and application

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preparation example Construction

[0041] A kind of preparation method of Ni-W-P / CNTs / CC catalytic electrode, comprises the steps:

[0042] A composite carbon material substrate (CNTs / CC) is provided; the composite carbon material substrate includes carbon cloth (CC) and carbon nanotubes (CNTs) attached to the carbon cloth;

[0043] The Ni-W-P composite catalytic material is grown in-situ on the composite carbon material substrate.

[0044] Among them, in a preferred embodiment, the composite carbon material substrate (CNTs / CC) is obtained by chemical vapor deposition of carbon nanotubes (CNTs) on carbon cloth (CC). That is, carbon nanotubes (CNTs) are grown on carbon cloth (CC) by chemical vapor deposition.

[0045] Furthermore, the composite carbon material substrate (CNTs / CC) was obtained by the following steps:

[0046] S1. Put carbon cloth (CC) into concentrated H 2 SO 4 and concentrated HNO 3 Soak in a mixed solution with a volume ratio of 1:1 to 3:1 for 3 hours, then wash and dry;

[0047] S2. Put ...

Embodiment 1

[0072] Preparation of composite carbon material substrate (CNTs / CC):

[0073] Put 1.0×1.0mm carbon cloth (CC) into concentrated H 2 SO 4 and concentrated HNO 3 After soaking in a mixed solution with a volume ratio of 3:1 for 3 hours, wash, wash with absolute ethanol and acetone in sequence, and dry at 60°C.

[0074] Put the dried carbon cloth (CC) into a solution of 0.1mol L-1Ni(NO3)2 6H2O, 0.5mol L-1CH4N2O (the solvent is a mixture of ethylene glycol and deionized water with a volume ratio of 1:1 ), after hydrothermal reaction at 120°C for 6h, it was taken out, and dried in a water bath at 60°C.

[0075] Put the carbon cloth (CC) dried in a water bath into an atmosphere tube furnace, carry out heat preservation and reduction reaction at 500°C for 0.5h, and cool down to room temperature with the furnace, then place melamine upstream of the carbon cloth (CC), and heat it at 800°C The chemical vapor deposition reaction was carried out for 1 h, the holding time was 1 h, and t...

Embodiment 2

[0080] Preparation of composite carbon material substrate (CNTs / CC):

[0081] Soak a 1.0×1.0mm carbon cloth (CC) in a mixed solution of concentrated H2SO4 and concentrated HNO3 with a volume ratio of 3:1, wash it for 3 hours, wash it with absolute ethanol and acetone, and dry it at 60°C.

[0082] Put the dried carbon cloth (CC) into a solution of 0.1mol L-1Ni(NO3)2 6H2O, 0.5mol L-1 CH4N2O (the solvent is a mixture of ethylene glycol and deionized water with a volume ratio of 1:1). mixture), after hydrothermal reaction at 150°C for 6h, it was taken out and dried in a water bath at 60°C.

[0083] Put the carbon cloth (CC) dried in a water bath into an atmosphere tube furnace, carry out heat preservation and reduction reaction at 600°C for 1 hour, and cool down to room temperature with the furnace, then place melamine upstream of the carbon cloth (CC), and carry out at 1000°C The chemical vapor deposition reaction was 2 hours, the holding time was 2 hours, and the furnace was co...

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Abstract

The invention discloses a Ni-W-P / CNTs / CC catalytic electrode. The catalyst electrode comprises a composite carbon material substrate (CNTs / CC) and a Ni-W-P composite catalytic material grown on the composite carbon material substrate (CNTs / CC) in situ; the composite carbon material substrate comprises carbon cloth (CC) and carbon nanotubes (CNTs) grown on the carbon cloth (CC). The Ni-W-P / CNTs / CCcatalytic electrode and the catalytic electrode material Ni-W-P are grown on the composite carbon material substrate (CNTs / CC) in situ, the composite carbon material is very stable and is a good conductive carrier, and the Ni-W-P composite catalytic material is grown on the composite carbon material substrate in situ to form a stable self-supporting catalytic electrode, so that the catalytic activity and the stability of the electrode can be improved. The Ni-W-P / CNTs / CC catalytic electrode does not adopt an adhesion agent, so that the problems of poor apparent catalytic activity and poor working stability caused by the adhesion agent are avoided. The invention also provides a preparation method and application of the Ni-W-P catalytic electrode.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and relates to a Ni-W-P / CNTs / CC catalytic electrode and a preparation method and application thereof. Background technique [0002] Energy and environmental issues are two major issues facing all mankind at present. Because hydrogen has the characteristics of high energy density and zero emissions (no greenhouse gas emissions), it is considered to be the most potential clean energy carrier. At the same time, hydrogen can drive various electronic devices and power vehicles through hydrogen fuel cells and other methods. [0003] Hydrogen production by electrolysis of water is one of the most ideal sustainable hydrogen production methods. However, due to the high overpotential of hydrogen evolution and oxygen evolution reactions, the energy conversion rate of electrolysis water reaction will be reduced. Therefore, in order to reduce energy loss and improve energy conversion efficiency, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/06C25B11/12C23C16/26
CPCC23C16/26C25B1/04C25B11/051C25B11/091Y02E60/36
Inventor 盛敏奇吴琼施嘉伦吕凡
Owner SUZHOU UNIV