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Phosphorus-doped nickel cobaltate/foam nickel electrode, preparation method and applications thereof

A technology of nickel foam and nickel cobaltate, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of limited application, low stability, low reserve, etc., and achieve reduced consumption, good stability, and low cost Effect

Inactive Publication Date: 2019-09-03
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost, low reserve and low stability of noble metal-based electrocatalysts limit their application in large-scale hydrogen production

Method used

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  • Phosphorus-doped nickel cobaltate/foam nickel electrode, preparation method and applications thereof
  • Phosphorus-doped nickel cobaltate/foam nickel electrode, preparation method and applications thereof
  • Phosphorus-doped nickel cobaltate/foam nickel electrode, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of phosphorus-doped nickel cobaltate / foam nickel electrode, comprising the following steps:

[0030] (1) Preparation of foamed nickel: Cut the foamed nickel into a rectangle with a size of 1cm×1.5cm, soak the foamed nickel in 3M HCl, acetone, absolute ethanol and deionized water in sequence for ultrasonic cleaning, each time for 10 minutes;

[0031] (2) Add 232.84mgCo(NO 3 ) 2 ·6H 2 O, 116.3mgNi(NO 3 ) 2 ·6H 2 O, 72mg urea and 30mL deionized water were mixed, and after stirring for 30 min, a hydrothermal solution was obtained.

[0032] (3) Add the dried nickel foam and the prepared hydrothermal solution into a 50ml reactor, keep it warm at 120°C for 8 hours, pour the prepared hydrothermal solution into the high-pressure reactor, and fix the nickel foam vertically in the high-pressure reactor. At the bottom of the reactor, after fastening the autoclave, place the autoclave in a blast drying oven. After the heat preservation is over, cool to ro...

Embodiment 2

[0037] A preparation method of phosphorus-doped nickel cobaltate / foam nickel electrode, comprising the following steps:

[0038] (1) Preparation of foamed nickel: Cut the foamed nickel into a rectangle with a size of 1cm×1.5cm, soak the foamed nickel in 3M HCl, acetone, absolute ethanol and deionized water in sequence for ultrasonic cleaning, each time for 12 minutes;

[0039] (2) Add 200mgCo(NO 3 ) 2 ·6H 2 O, 100mgNi(NO 3 ) 2 ·6H 2 O. 50mg urea and 25mL deionized water were mixed, and after stirring for 25 min, the hydrothermal solution was obtained.

[0040] (3) Add the dried nickel foam and the prepared hydrothermal solution into a 50ml autoclave, keep it warm at 120°C for 8 hours, pour the prepared hydrothermal solution into the autoclave, and fix the foam nickel vertically on the The bottom of the autoclave (such as figure 1 shown), after fastening the autoclave, place the autoclave in a blast drying oven. After the heat preservation is over, cool to room temperat...

Embodiment 3

[0044] A preparation method of phosphorus-doped nickel cobaltate / foam nickel electrode, comprising the following steps:

[0045] (1) Preparation of foamed nickel: Cut the foamed nickel into a rectangle with a size of 1cm×1.5cm, soak the foamed nickel in 3M HCl, acetone, absolute ethanol and deionized water in sequence for ultrasonic cleaning, each time for 10 minutes;

[0046] (2) 300mgCo(NO 3 ) 2 ·6H 2 O, 200mgNi(NO 3 ) 2 ·6H 2 0, 100mg urea and 30mL deionized water were mixed, and the hydrothermal solution was obtained after stirring for 30 min.

[0047] (3) Add the dried nickel foam and the prepared hydrothermal solution into a 50ml reaction kettle, keep it warm at 120°C for 8 hours, pour the prepared hydrothermal solution into the high-pressure reaction kettle, and fix the nickel foam vertically in the reaction kettle Bottom of kettle (such as figure 1 shown), after fastening the autoclave, place the autoclave in a blast drying oven. After the heat preservation is ...

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Abstract

The invention belongs to the field of electrode materials, and particularly relates to a phosphorus-doped nickel cobaltate / foam nickel electrode, a preparation method and applications thereof. The preparation method comprises: sequentially carrying out cutting treatment, ultrasonic cleaning treatment and drying treatment on foam nickel so as to be spare; dissolving Co(NO3)2.6H2O, Ni(NO3)2.6H2O andurea in deionized water, and uniformly stirring to obtain a hydrothermal solution; inserting the foam nickel into a polytetrafluoroethylene mold base, wherein the foam nickel is maintained in a vertical state; maintaining the 120 DEG C for 5-8 h, cooling to a room temperature, washing, drying, calcining, and cooling to a room temperature to obtain a nickel cobaltate / foam nickel electrode; and placing the nickel cobaltate / foam nickel electrode and NaH2PO2.2H2O in a quartz boat, placing the quartz boat in a tubular furnace, and phosphating to obtain the phosphorus-doped nickel cobaltate / foam nickel electrode. According to the present invention, the obtained phosphorus-doped nickel cobaltate / foam nickel electrode can be used as the cathode for hydrogen evolution in water electrolysis, can further be used as the anode for oxygen evolution, is a dual-function electrode, and has good economy and environmental protection.

Description

technical field [0001] The invention belongs to the field of electrode materials, and in particular relates to a phosphorus-doped nickel cobaltate / foam nickel electrode and a preparation method and application thereof. Background technique [0002] Growing fossil fuel consumption and various environmental concerns have prompted us to develop various green strategies for energy conversion and storage. Intermittent shortages of new energy technologies such as wind and solar have limited their widespread adoption. However, electrolysis of water to produce hydrogen can effectively solve these problems. It consists of two half-reactions, the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). Low-energy and high-efficiency water electrolysis approaches rely heavily on innovative breakthroughs in the design of excellent electrocatalysts for the two half-reactions. In particular, OER involves four-electron transfer, and the main bottleneck is its slow reac...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/03C25B11/06
CPCC25B1/04C25B11/031C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 吕伟欣张瑞程兰紫王伟
Owner YANCHENG INST OF TECH
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