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Phosphorus-modified nickel cobaltate-modified carbon nanotube electrode catalyst

A technology of electrode catalysts and carbon nanotubes, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of low catalytic hydrogen evolution reaction activity and energy loss, and achieve efficient oxygen evolution reaction, high conductivity, and excellent long-term stability Effect

Inactive Publication Date: 2021-08-03
广州费舍尔人工智能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under alkaline conditions, nickel cobaltate catalyst has a certain catalytic effect for oxygen evolution reaction and oxygen reduction reaction, but its activity for catalyzing hydrogen evolution reaction is very low; and the pure phase nickel cobaltate is a semiconductor, which will cause additional energy loss

Method used

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  • Phosphorus-modified nickel cobaltate-modified carbon nanotube electrode catalyst
  • Phosphorus-modified nickel cobaltate-modified carbon nanotube electrode catalyst
  • Phosphorus-modified nickel cobaltate-modified carbon nanotube electrode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of preparation of phosphorus-modified nickel cobaltate modified carbon nanotube electrode catalyst, comprises the following steps:

[0024] (1) Weigh 0.05g of hydroxyl carbon nanotube oCNT, 0.0476g (0.2mmol) of cobalt chloride hexahydrate and 0.0237g (0.1mmol) of nickel chloride hexahydrate in a 100mL reactor, then add 0.75mL of ammonia water and 70mL of absolute ethanol, followed by ultrasonication for 30min for dispersion and mixing.

[0025] (2) Put the reaction kettle in an oven at 140°C for 16 hours for heat treatment, then wait for room temperature, filter, wash and dry in an oven at 50°C for 4 hours to obtain a black powder.

[0026] (3) Put the above-mentioned black powder in a porcelain boat and move it to a tube furnace, place a porcelain boat filled with 100 mg of sodium hypophosphite at the air inlet, feed nitrogen as a protective gas, and heat up at a rate of 8°C / min The rate is increased to 600° C. and maintained for 2 hours, and the phosphorus-mod...

Embodiment 2

[0028] Place the porcelain boat that fills 200mg sodium hypophosphite at the air inlet; Other preparation process and parameter are identical with embodiment 1; Sample mark is P-NiCo 2 o 4 -oCNT-2.

Embodiment 3

[0030] Place the porcelain boat that fills 300mg sodium hypophosphite at the air inlet; Other preparation process and parameter are identical with embodiment 1; Sample mark is P-NiCo 2 o 4 -oCNT-3.

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Abstract

The invention discloses a phosphorus-modified nickel cobaltate-modified carbon nanotube electrode catalyst. The preparation method comprises the following steps of mixing cobalt chloride hexahydrate and nickel chloride hexahydrate into an ethanol solution containing ammonia water, adding a hydroxyl carbon nanotube, mixing and dispersing to obtain a precursor mixed solution, carrying out a hydrothermal reaction at 140 DEG C for 16 hours, filtering, washing and drying, and then carrying out heat treatment with sodium hypophosphite at 600 DEG C under the protection of nitrogen for 2 hours to obtain the catalyst. The electrode catalyst disclosed by the invention is based on phosphorus-modified nickel cobaltate nanoparticles with high intrinsic activity loaded on the carbon nanotubes, and has excellent catalytic performance of oxygen reduction, oxygen evolution and hydrogen evolution reaction. The preparation method is simple, low in cost and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of new energy and new material application, and specifically relates to a preparation method and application of a phosphorus-modified nickel cobaltate-modified carbon nanotube oxygen evolution reaction electrode catalyst. Background technique [0002] Cobalt-based spinel-type transition metal oxides are low in cost, abundant in reserves, and environmentally friendly, and usually show good stability as catalysts. Under alkaline conditions, nickel cobaltate catalyst has a certain catalytic effect for oxygen evolution reaction and oxygen reduction reaction, but its activity for catalyzing hydrogen evolution reaction is very low; and the pure phase nickel cobaltate is a semiconductor, which will cause additional energy loss. The coupling of hydroxyl carbon nanotubes and nickel cobaltate to construct composite materials can effectively reduce the ohmic impedance of the reaction and enhance the conductivity of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/02C25B11/091
CPCC25B1/02
Inventor 曾庆钢
Owner 广州费舍尔人工智能技术有限公司
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