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Preparation method and application of self-supporting electrode

A self-supporting electrode and supporting material technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor stability and high cost, and achieve the effect of saving energy, improving electrocatalytic performance, and reliable technical support

Active Publication Date: 2022-01-14
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem to be solved: This application mainly proposes a preparation method and application of transition metal basic carbonate self-supporting electrode based on conductive MOF ligand organic small molecule modification, which is used to completely replace noble metal copper and greatly improve non-conductive electrodes. The catalytic activity and stability of noble metal nanocatalysts can improve the comprehensive performance of new energy devices, solve the problems of low activity, poor stability and high cost of catalyst components in new energy devices, and greatly promote the application of non-noble metal nanocatalysts in new energy. Large-scale application in the field

Method used

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  • Preparation method and application of self-supporting electrode
  • Preparation method and application of self-supporting electrode

Examples

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Effect test

Embodiment 1

[0036] Copper foam self-supporting electrode supported by HHTP modified basic cobalt carbonate (HHTP-Co(OH) 2 CO3 / CF) preparation method, specifically comprises the following steps:

[0037] The first step, Co(OH) 2 CO 3 The synthesis method of / CF: Add 1cm × 2cm foam copper and 4mL solution in the reaction kettle, seal the reaction kettle for 12 hours of hydrothermal reaction at 95°C, the solution is a mixed solution of 0.6M urea and 0.3M cobalt nitrate, wait for the temperature After naturally cooling down to room temperature, the carrier material was taken out, rinsed with deionized water, and dried under vacuum at 50°C for 8-16 hours.

[0038] The second step, HHTP-Co(OH) 2 CO 3 The synthesis method of / CF: add 3~5ml deionized water and 7mg HHTP into the reaction kettle, add 0.18ml NMP, and ultrasonicate for 20~30min under the condition of 100Hz until the mixture is uniform to form a dark solution, and the carrier after the first step reaction Immerse in the dark sol...

Embodiment 2

[0042] Copper foam self-supporting electrode supported by HOB modified basic cobalt carbonate (HOB-Co(OH) 2 CO 3 / CF) preparation method, specifically comprises the following steps:

[0043] The first step, Co(OH) 2 CO 3 The synthesis method of / CF: Add 2cm × 2cm foam copper and 4mL solution in the reaction kettle, seal the reaction kettle 120 ℃ hydrothermal reaction for 6 hours, the solution is a mixed solution of 0.6M urea and 0.3M cobalt nitrate, wait for the temperature After naturally cooling down to room temperature, the carrier material was taken out, rinsed with deionized water, and dried under vacuum at 50°C for 8 hours.

[0044] The second step, HOB-Co(OH) 2 CO 3 The synthesis method of / CF: add 5mg of HOB, 4ml of deionized water and 0.165mL of NMP into the reaction kettle, dissolve it by ultrasonication for 10min, and then add a piece of Co(OH) with a size of 1cm × 2cm 2 CO 3 / CF, a sealed reaction vessel was hydrothermally reacted at 120°C for 12 hours, and ...

Embodiment 3

[0046] HHTP-modified basic nickel-cobalt carbonate supported carbon cloth self-supporting electrode (HHTP-NiCo(OH) 2 CO 3 / CC) preparation method, specifically comprises the following steps:

[0047] The first step, NiCo(OH) 2 CO 3 Synthesis method of / CC: Add 0.5cm × 0.5cm hydrophilic carbon cloth and 1 mL solution in the reactor, seal the reactor at 95°C for 12 hours, the solution is 0.6M urea, 0.1M cobalt nitrate, 0.1M nickel nitrate mixed solution, after the temperature naturally dropped to room temperature, the carrier material was taken out, rinsed with deionized water, and dried under vacuum at 50°C for 8h.

[0048] The second step, HHTP-NiCo(OH) 2 CO 3 The synthesis method of / CC: add 1mg of HHTP, 4ml of deionized water and 0.165mL of NMP into the reaction kettle, dissolve it by ultrasonication for 30min, and then add a piece of NiCo(OH) with a size of 0.5cm × 0.5cm 2 CO 3 / CC, hydrothermal reaction at 85°C in a sealed reaction vessel for 24 hours, after cooling...

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Abstract

The invention discloses a preparation method and application of a self-supporting electrode, and particularly relates to a preparation method of a self-supporting electrode H-M(OH)2CO3 / SM, wherein the preparation method is characterized in that rod-shaped transition metal basic carbonate M(OH)2CO3 / SM is grown in situ on the surface of a supporting material SM for short, and then ligand organic small molecules of a conductive metal organic framework MOF, including but not limited to HHTP, HOB and HAB, are used for modifying the surface of a loaded M(OH)2CO3 rod-shaped material. Transition metal basic carbonate is modified in situ by using a conductive MOF ligand, so that the charge transfer capacity of the transition metal basic carbonate is improved, the conductivity and catalytic activity of M(OH)2CO3 in the electro-catalysis process are improved, and the comprehensive performance of a corresponding new energy device is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a preparation method and application of a self-supporting electrode. Background technique [0002] The development of high-performance self-supporting electrodes is crucial to facilitate the performance of energy storage and conversion devices. Hydrogen energy is characterized by environmental friendliness and high energy density, and is recognized as an ideal substitute for fossil fuels. Electrolysis of water is a green and efficient way to produce hydrogen, and it also provides a good platform for harnessing intermittent renewable energy sources such as wind and solar. In the actual water electrolysis process, in order to improve the efficiency of water splitting, noble metal Pt-based and Ir / Ru-based electrocatalysts are usually used to reduce the two core half-reactions related to water splitting, namely hydrogen evolution reaction (HER) and oxygen evolution....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/031C25B11/054C25B11/061C25B11/095
CPCC25B1/04C25B11/031C25B11/054C25B11/061C25B11/095Y02E60/36
Inventor 张明道刘悦戚彩靳亚超宋力方昊曹晖
Owner NANJING UNIV OF INFORMATION SCI & TECH
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