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a fe 2 p-wo x Preparation method of oxygen evolution electrocatalyst

An electrocatalyst, fe2p-wo2.92 technology, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve the problems of cost limitation, high scarcity, slowness, etc., achieve excellent electrocatalytic oxygen evolution performance, simple preparation method, The effect of long service life

Active Publication Date: 2022-02-15
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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  • a fe <sub>2</sub> p-wo <sub>x</sub> Preparation method of oxygen evolution electrocatalyst
  • a fe <sub>2</sub> p-wo <sub>x</sub> Preparation method of oxygen evolution electrocatalyst
  • a fe <sub>2</sub> p-wo <sub>x</sub> Preparation method of 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: The above solution without sodium tungstate and nickel foam were transferred to a 90 mL reaction kettle, and kept 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 ...

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Abstract

The invention relates to the technical field of electrocatalytic water splitting, specifically an Fe 2 P‑‑WO 2.92 Preparation method of oxygen evolution electrocatalyst, Fe obtained by simple hydrothermal, etching and low-temperature phosphating 2 P‑WO 2.92 Composite materials, the hydrothermal method is to grow tungsten on nickel foam to obtain a tungsten-based precursor; soak the obtained tungsten-based precursor in an iron species solution to obtain a tungsten-iron composite material precursor, and perform low-temperature heating in a nitrogen atmosphere. Phosphating treatment. The preparation method of the invention is simple, and Fe 2 P‑WO 2.92 The composite material has excellent electrocatalytic oxygen evolution performance under alkaline conditions and has a long 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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Patent Type & Authority Patents(China)
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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