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Preparation method of Fe2P-WOx oxygen evolution electrocatalyst

An electrocatalyst, fe2p-wox technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of cost limitation, high scarcity, high potential, etc., achieve excellent electrocatalytic oxygen evolution performance, long service life, and preparation method simple effect

Active Publication Date: 2021-08-13
华氢(广东)新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the oxygen evolution reaction, the potential is too high due to the slow kinetics, which greatly limits the efficiency of the oxygen evolution reaction.
In recent years, the abundant transition metals on the earth have attracted extensive research and attention of scientists. Among them, the noble metal iridium and platinum-based electrocatalysts have shown good electrocatalytic performance in oxygen evolution and hydrogen evolution reactions, respectively, but are scarce and costly. and other shortcomings still limit their large-scale practical application

Method used

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  • Preparation method of Fe2P-WOx oxygen evolution electrocatalyst
  • Preparation method of Fe2P-WOx oxygen evolution electrocatalyst
  • Preparation method of Fe2P-WOx oxygen evolution electrocatalyst

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Effect test

Embodiment 1

[0022] Two, embodiment 1: prepare WO 2.92 / NF material

[0023] Step (1) process nickel foam: cut the nickel foam into 2×3 cm 2 size. Then ultrasonically wash in 0.5 mol / L sulfuric acid solution, deionized water and ethanol for 10 min respectively, cycle wash three times, and dry naturally for later use.

[0024] Step (2) Prepare sodium tungstate solution: weigh 1 mmol sodium tungstate dihydrate and dissolve it in 50 mL deionized water, then add hydrochloric acid dropwise until the pH is 2~3, stir for 30 minutes to obtain a concentration of sodium tungstate solution of 0.02 mol / L.

[0025] Step (3) Hydrothermal reaction: Put the nickel foam obtained in step (1) into the sodium tungstate solution prepared in step (2) and transfer it to a 90 mL reaction kettle, and keep it in an oven at 180 °C for 6 h. After natural cooling, rinse the nickel foam with a large amount of deionized water, and then dry it at room temperature for later use.

[0026] Step (4) Phosphating treatmen...

Embodiment 2

[0027] Three, embodiment 2: preparation Fe 2 P-WO 2.92 / NF composite material

[0028] Step (1) process nickel foam: cut the nickel foam into 2×3 cm 2 size. Then ultrasonically wash in 0.5 mol / L sulfuric acid solution, deionized water and ethanol for 10 min respectively, cycle wash three times, and dry naturally for later use.

[0029] Step (2) Preparation of sodium tungstate solution: Weigh 1 mmol of sodium tungstate dihydrate and ultrasonically dissolve it in 50 mL of deionized water, then add hydrochloric acid dropwise until the pH is 2~3, and stir for 30 minutes to obtain the concentration of sodium tungstate solution as 0.02 mol / L.

[0030] Step (3) Hydrothermal reaction: Put the nickel foam obtained in step (1) into the sodium tungstate solution prepared in step (2) and transfer it to a 90 mL reaction kettle, and keep it in an oven at 180 °C for 6 h. After natural cooling, rinse the nickel foam with a large amount of deionized water, and then dry it at room temperat...

Embodiment 3

[0034] Four, embodiment 3: preparation Fe 2 P / NF material

[0035] Step (1) process nickel foam: cut the nickel foam into 2×3 cm 2 size. Then ultrasonically wash in 0.5 mol / L sulfuric acid solution, deionized water and ethanol for 10 min respectively, cycle wash three times, and dry naturally for later use.

[0036] Step (2) Prepare a solution without sodium tungstate: add hydrochloric acid dropwise to 50 mL of deionized water until the pH is 2~3, and stir for 30 minutes to obtain a solution without sodium tungstate.

[0037] Step (3) Hydrothermal reaction: Transfer the above solution without sodium tungstate and nickel foam to a 90 mL reactor, and keep it in an oven at 180 °C for 6 h. After natural cooling, rinse the nickel foam with a large amount of deionized water, and then dry it at room temperature for later use.

[0038] Step (4) Preparation of potassium ferricyanide solution: Weigh 5 mmol of potassium ferricyanide and dissolve it in 50 mL of deionized water. The co...

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Abstract

The invention relates to the technical field of electrocatalysis water decomposition, in particular to a preparation method of a Fe2P-WO2.92 oxygen evolution electrocatalyst. A Fe2P-WO2.92 composite material is obtained through simple hydrothermal, etching and low-temperature phosphating treatment methods, and according to the hydrothermal method, tungsten grows on foamed nickel to obtain a tungsten-based precursor; and the obtained tungsten-based precursor is soaked in an iron species solution to obtain a tungsten-iron composite material precursor, and low-temperature phosphating treatment is carried out in a nitrogen atmosphere. The preparation method is simple, the Fe2P-WO2.92 composite material is obtained through simple hydrothermal treatment, etching and low-temperature phosphating treatment on the foamed nickel, and the Fe2P-WO2.92 composite material has excellent electro-catalytic oxygen evolution performance under the alkaline condition and is long in service life.

Description

technical field [0001] The invention belongs to the field of electrocatalytic total water splitting, specifically a kind of Fe 2 P-WO x Preparation method of oxygen evolution electrocatalyst. Background technique [0002] Energy and the environment are two important issues affecting the development of human society. With the continuous development and progress of society, people's demand for energy is getting higher and higher. However, the energy currently used is mainly fossil fuels, including some non-renewable energy sources such as coal, oil, and natural gas. The excessive exploitation and use of fossil energy not only causes the increasing shortage of energy, but also brings irreversible damage to the environment. Therefore, it is imminent to develop efficient, safe and sustainable clean energy. Among energy conversion technologies, water electrolysis is considered to be one of the most promising methods for producing high-purity hydrogen from water. However, in t...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04
CPCC25B1/04Y02E60/36
Inventor 杨秀林彭启敏王丽霞邵雪
Owner 华氢(广东)新能源科技有限公司
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