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Preparation of an Array Structured Transition Metal Selenide Electrode and Its Application in Electrolysis of Water

A transition metal, array structure technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of insufficient exposure of active sites, unfavorable mass transfer and electron transfer, inhibition of development and application, etc., to achieve excellent electrocatalytic decomposition Effects of water performance, controllability of synthesis process, and universality of synthesis method

Active Publication Date: 2021-07-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, there are still some problems in the synthesis of MOFs, such as the powder is easy to agglomerate, the active sites cannot be fully exposed, etc., which is not conducive to mass transfer and electron transfer, and inhibits its development and application.

Method used

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  • Preparation of an Array Structured Transition Metal Selenide Electrode and Its Application in Electrolysis of Water
  • Preparation of an Array Structured Transition Metal Selenide Electrode and Its Application in Electrolysis of Water
  • Preparation of an Array Structured Transition Metal Selenide Electrode and Its Application in Electrolysis of Water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step is to treat the nickel sheet (NF) with hydrochloric acid, acetone, ethanol and water for 10 minutes. -15 minutes, use the same method to sequentially use acetone, ethanol and water for ultrasonic cleaning. Then dry the cleaned NF for the next step.

[0023] In the second step, NF is immersed in mother liquor B for hydrothermal reaction. Mother liquor B is 0.15g of 2,5-dihydroxyterephthalic acid and 0.7g of cobalt nitrate hexahydrate dissolved in 20ml of N,N-dimethylformamide and water mixed solution with ethanol. The volume ratio of N,N-dimethylformamide to water and ethanol is 1:1:1, and transferred into a 100ml reactor for hydrothermal reaction at 100°C for 15 hours. After the reaction, the NF-Co-MOF composite was obtained by washing with ethanol and N,N-dimethylformamide several times.

[0024] In the third step, 0.1-0.3g of selenium powder and the NF-Co-MOF composite material synthesized in the previous step are placed in a magnetic boat at the sam...

Embodiment 2

[0026] The first step is to pretreat the nickel sheet (NF) with hydrochloric acid, acetone, ethanol and water for 10 minutes. For 10-15 minutes, use the same method to sequentially use acetone, ethanol and water for ultrasonic cleaning. Then dry the cleaned NF for the next step.

[0027] In the second step, NF is immersed in mother liquor B for hydrothermal reaction. Mother liquor B is 0.15g of 2,5-dihydroxyterephthalic acid and 0.7g of nickel nitrate hexahydrate dissolved in 20ml of N,N-dimethylformamide and water mixed solution with ethanol. The volume ratio of N,N-dimethylformamide to water and ethanol is 1:1:1, and transferred into a 100ml reactor for hydrothermal reaction at 100°C for 15 hours. After the reaction, the NF-Ni-MOF composite was obtained by washing with ethanol and N,N-dimethylformamide several times.

[0028] In the third step, 0.1-0.3g of selenium powder and the NF-Ni-MOF composite material synthesized in the previous step are placed in a magnetic boat a...

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Abstract

The preparation of an array structure transition metal selenide electrode and its application in electrolyzed water belong to the technical field of electrodes. The first step is to optimize the nickel sheet (NF) substrate through simple pretreatment, and the second step is to uniformly grow metal-organic framework (Mn / Fe / Co / Ni / Cu-MOF) nano-arrays on the surface of the nickel sheet substrate in situ, Obtain NF‑MOFs materials, the third step is in-situ selenization on the surface of MOFs nanoarrays, and finally NF‑M x Se y Nanoarray electrode materials. NF‑M x Se y As an electrolytic water electrode, it has a lower starting point, a higher current density, excellent electrocatalytic water splitting performance and higher stability, and can be applied in new energy storage and conversion devices such as electrolytic water.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis development in the conversion field of new energy storage. The technology involves the construction of metal-organic framework materials (MOFs) and the preparation of array-structured transition metal selenides (NF-M x Se y )electrode. Background technique [0002] With the rapid development of industrial production and the continuous increase of population, fossil fuels mainly represented by coal, oil and natural gas have been consumed in large quantities in recent decades, causing inevitable environmental pollution and energy shortage. Therefore, finding a clean and renewable energy source has increasingly become the development demand of the present era. Among many materials, hydrogen, as a green, efficient, and energy-rich clean energy, is a potential substitute for fossil energy in the future. Renewable characteristics can well solve the two major problems of energy crisis and en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/042C25B1/04C02F1/461
CPCC02F1/46109C02F2001/46138Y02E60/36
Inventor 李建荣刘名乘豆义波谢亚勃魏欣
Owner BEIJING UNIV OF TECH
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