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Foam nickel@cobalt molybdenum phosphide/nickel iron double hydroxide electrode, preparation method and application thereof

A double hydroxide and phosphide technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of high reaction temperature and long reaction time, and achieve high safety factor, reduce preparation cost, and environment-friendly Effect

Active Publication Date: 2019-10-18
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction temperature of the above process is higher, the reaction time is longer and a variety of metal salt solutions and buffer solutions are added.

Method used

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  • Foam nickel@cobalt molybdenum phosphide/nickel iron double hydroxide electrode, preparation method and application thereof
  • Foam nickel@cobalt molybdenum phosphide/nickel iron double hydroxide electrode, preparation method and application thereof
  • Foam nickel@cobalt molybdenum phosphide/nickel iron double hydroxide electrode, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of nickel foam@cobalt molybdenum phosphide (Co / Mo=1.5:1) electrode, the steps are as follows:

[0048] (1) Hydrothermal reaction: weigh 0.253g CoSO 4 ·7H 2 O and 0.741g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 15 ml of deionized water to prepare a precursor solution, put into clean nickel foam, placed in a reaction kettle, reacted at 100 °C for 10 hours, cooled, cleaned and vacuum dried at 40 °C for 6 hours.

[0049] (2) Phosphating treatment: the nickel foam loaded with cobalt-molybdenum composite obtained in step (1) and 0.3g Na 3 PO 4 Put two burning boats respectively, and place them in a tube furnace. Under the protection of argon, the temperature was raised to 300°C at 5°C / min, kept for 1 hour and cooled to obtain foamed nickel@cobalt molybdenum phosphide (Co / Mo =1.5:1) electrode.

[0050] Catalytic performance test: hydrogen evolution reaction and oxygen evolution reaction: install the foamed nickel@cobalt molybdenum phosphide (...

Embodiment 2

[0052] The preparation method of nickel foam@cobalt molybdenum phosphide (Co / Mo=2.3:1) electrode, the steps are as follows:

[0053] (1) Hydrothermal reaction: Weigh 0.3056g Co(NO 3 ) 2 ·6H 2 O and 0.109 g Na 2 MoO 4 2H 2 O was dissolved in 15 ml of deionized water to prepare a precursor solution, put into clean nickel foam, placed in a reaction kettle, reacted at 180 °C for 6 hours, cooled, cleaned and vacuum dried at 70 °C for 12 hours.

[0054] (2) Phosphating treatment: the nickel foam loaded with cobalt-molybdenum composite obtained in step (1) and 1.0g NaH 2 PO 2 Put two burning boats respectively, and put them in a tube furnace. Under nitrogen protection, raise the temperature to 500°C at 5°C / min, keep it warm for 3 hours and cool down to get nickel foam@cobalt molybdenum phosphide (Co / Mo= 2.3: 1) Electrodes.

[0055] Catalytic performance test: hydrogen evolution reaction and oxygen evolution reaction: install the foamed nickel@cobalt molybdenum phosphide (Co / M...

Embodiment 3

[0057] The preparation method of nickel foam@cobalt molybdenum phosphide (Co / Mo=4:1) electrode, the steps are as follows:

[0058] (1) Hydrothermal reaction: Weigh 0.349g Co(NO 3 ) 2 ·6H 2 O and 0.073g Na 2 MoO 4 2H 2 O was dissolved in 15 ml of deionized water to prepare a precursor solution, put into clean nickel foam, placed in a reaction kettle, reacted at 150 °C for 6 hours, cooled, cleaned and vacuum dried at 60 °C for 6 hours.

[0059] (2) Phosphating treatment: the nickel foam loaded with cobalt-molybdenum composite obtained in step (1) and 0.6g NaH 2 PO 2 Put two burning boats respectively, and place them in a tube furnace. Under the protection of nitrogen, raise the temperature to 450°C at 5°C / min, keep it warm for 2 hours and cool down to obtain foamed nickel@cobalt molybdenum phosphide (Co / Mo= 4:1) electrode.

[0060] Catalytic performance test: hydrogen evolution reaction and oxygen evolution reaction: install the foamed nickel@cobalt molybdenum phosphide ...

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Abstract

The invention relates to a foam nickel@cobalt molybdenum phosphide / nickel iron double hydroxide electrode, a preparation method and application thereof. Firstly, a three-dimensional porous coral skeleton-shaped cobalt molybdenum phosphide is formed on foam nickel, and then on the basis of the product, a vertically arranged nickel iron double hydroxide nanosheet array is prepared by electrodeposition process. The preparation method includes the steps of: first, placing foam nickel in a precursor solution of a cobalt salt and molybdate for hydrothermal reaction, under the coexistence of an inertgas and phosphate, conducting phosphatization treatment, and finally performing electrodeposition in an aqueous solution of a nickel salt and a ferrous salt, thus obtaining the foam nickel@cobalt molybdenum phosphide / nickel iron double hydroxide electrode material. The foam nickel@cobalt molybdenum phosphide / nickel iron double hydroxide electrode provided by the invention adopts a non-noble metalsalt precursor and hydrosolvent, is low in price and simple in preparation, has hydrogen evolution, oxygen evolution and full hydrolysis performance, and also has good stability.

Description

technical field [0001] The invention belongs to the technical field of electrochemical electrode materials and renewable energy storage and conversion, and specifically relates to foam nickel@cobalt molybdenum phosphide / nickel-iron double hydroxide electrode and its preparation method and application. Background technique [0002] The process of using wind energy, solar energy, water energy, etc. to generate electricity and catalyze the decomposition of water into hydrogen and oxygen is a clean and effective way to store and convert renewable energy, and it plays an important role in the fields of environmental protection, new energy development and utilization technology. Among them, the electrocatalytic hydrogen evolution reaction and oxygen evolution reaction are also key reactions in many energy-related devices, such as renewable fuel cells, rechargeable metal-air batteries, etc. Many studies have shown that the best catalysts for hydrogen evolution and oxygen evolution ...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B11/03C25B1/04C25D9/04C23C18/12B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23C18/1241C23C18/1295C25B1/04C25D9/04C25B11/031C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 胡玮麦婉珊李国强张凯凯黎进
Owner HUBEI UNIV
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