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Method for preparing bismuth-boron-based flexible catalytic electrode in organic phase

A catalytic electrode, organic phase technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of limiting the industrial application of bismuth materials, uncontrollable reaction rate, complicated preparation methods, etc., achieving controllable structure and morphology, working environment The effect of low requirements and simple preparation method

Inactive Publication Date: 2021-12-24
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0004] Chinese invention patent (201910677139.2) --- a preparation method of bismuth compound-sulfur composite electrode material ---, adding soluble inorganic salts containing bismuth to the mixture of graphene oxide solution and surfactant, in alkaline or acidic oil bath and drying under the same conditions to prepare bismuth compound-graphene oxide composite material, and then mixed with sulfur powder for high-temperature heat treatment to finally obtain sulfur-containing composite electrode material, but the preparation method of this patent is relatively complicated, and the preparation environment is relatively Harsh, it needs to be prepared under alkaline and high temperature conditions
Chinese invention patent (201810065925.2)---Preparation method and application of a bismuth elemental nanosheet composite electrode --- Re-reduction of the precursor dispersion based on the bismuth metal elemental substance to prepare bismuth elemental nanosheets, which are combined with bismuth elemental nanosheets Graphene composite can obtain a green and environmentally friendly composite electrode with simple process and good repeatability, but the reaction rate of this preparation method is uncontrollable and the shape cannot be adjusted
Chinese Invention Patent (201710204688.9)---Electrochemical Reduction of Carbon Dioxide Elemental Bismuth Catalyst and Its Preparation and Application---Mix bismuth nitrate and hydrazine hydrate, and through the process of heating reflux, washing separation and vacuum drying, it can be prepared Micro-nano-scale elemental metal bismuth catalyst, which has high catalytic activity and selectivity, low overpotential and high energy efficiency, but its reaction conditions are harsh and energy consumption is high
In summary, the series of patents have prepared various composite materials with excellent properties around metal bismuth, which has realized the wide application of bismuth-based electrodes. However, the series of bismuth-based materials require higher temperature, higher pressure or other high energy input. These harsh conditions greatly limit the industrial application of bismuth materials

Method used

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  • Method for preparing bismuth-boron-based flexible catalytic electrode in organic phase
  • Method for preparing bismuth-boron-based flexible catalytic electrode in organic phase
  • Method for preparing bismuth-boron-based flexible catalytic electrode in organic phase

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preparation example Construction

[0025] refer to Figure 1-5 , a method for preparing a bismuth boron-based flexible catalytic electrode in an organic phase, comprising: S1, by using a metal bismuth boron compound as a precursor, adding a reducing agent, a complexing agent, a buffer and an organic solution, according to a given The dosage ratio is mixed to prepare the plating solution;

[0026] S2. After ultrasonic cleaning of the base material in deionized water, the base material is then soaked in deionized water, ethanol and acetone in sequence to remove surface stains;

[0027] S3, immersing the flexible substrate material in the metal salt solution, and dipping it in borohydride for 2 s at the same time to complete the activation of the flexible non-conductive substrate, and then washing it with deionized water and ethanol in turn for use;

[0028] S4. Immerse the pretreated base material in step S3 into the plating solution prepared in step S1, take out the base material after electroless plating react...

Embodiment example 1

[0037] Example 1, Preparation of Bi-B@Cloth Electrode Catalytic Materials

[0038] Use deionized water to sonicate the cloth for 5 minutes to remove stains on the surface of the cloth substrate;

[0039] (2) using sodium borohydride solution and nickel sulfate solution dropwise on the cloth in step (1) to activate, and the activation time is 1-2s;

[0040] (3) The chemical plating solution containing Bi-B is configured, and the amount ratio of each substance and the experimental conditions are shown in the following table:

[0041]

[0042] The cloth substrate in step (2) is immersed in a Bi-B electroless plating solution, and chemically deposited at 5-40° C. for 30 minutes to 8 hours to obtain catalytic electrode materials with different deposition thicknesses. After washing with deionized water, After drying, Bi-B@Cloth electrodes can be prepared. The electrode photo and SEM image are as follows figure 2 (a-f);

[0043] (4) The hydrogen evolution reaction test was ca...

Embodiment 2

[0044] Example 2, Preparation of Bi-B-Ni@Paper Electrode Catalytic Material

[0045] (1) Ultrasonic cloth with deionized water for 5 minutes to remove stains on the surface of the paper substrate;

[0046] (2) dropwise on the paper sheet of step (1) with sodium borohydride solution and nickel sulfate solution, carry out activation for 2 seconds (s);

[0047] (3) The chemical plating solution containing Bi-B-Ni is configured, and the amount ratio of each substance and the experimental conditions are shown in the following table:

[0048]

[0049] The paper substrate in step (2) is immersed in the above solution, and chemically deposited at 5-40° C. for 30 minutes to 8 hours; catalytic electrode materials with different deposition thicknesses can be obtained, rinsed with deionized water, and dried to obtain electrodes. . Electrode photos such as image 3 (a);

[0050] (4) The hydrogen evolution reaction test was carried out using an electrochemical workstation at a room t...

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Abstract

The invention discloses a method for preparing a bismuth-boron-based flexible catalytic electrode in an organic phase, which comprises the following steps of by taking a metal bismuth-boron compound as a precursor, adding a reducing agent, a complexing agent, a buffering agent and an organic solution, and mixing in proportion to prepare a plating solution, ultrasonically cleaning a substrate material in deionized water, and soaking the substrate material in deionized water, ethanol and acetone in sequence, immersing a flexible substrate material in a metal salt solution, dipping the flexible substrate material in hydroboron for 2s to complete activation of a flexible non-conductive substrate, and washing the flexible non-conductive substrate with deionized water and ethanol in sequence for later use, and immersing the pretreated substrate material into the plating solution prepared in the first step, carrying out chemical plating reaction, taking out the substrate material, and washing with ethanol to obtain the electrode material, namely the product. The preparation method is simple, the universality is better, the manufacturing cost is lower, the concentration can be changed in a larger range, the stability is good, and the requirement on the working environment is low.

Description

technical field [0001] The invention relates to the technical field of catalytic materials for electrolysis of water, in particular to a preparation method for realizing a bismuth boron-based flexible catalytic electrode in an organic phase. Background technique [0002] The water electrolysis technology method is an efficient and clean hydrogen evolution method. The hydrogen evolution process is simple, the product purity is high, and the hydrogen purity can generally reach 99%. It has potential application scenarios for large-scale hydrogen production, and is in response to global energy challenges and environmental degradation. Problems and other aspects have great scientific value and engineering application significance. However, in the process of electrolysis of water, the redox reaction and ion transport resistance cause the electrolysis potential to rise, causing the overpotential phenomenon, that is, in the actual electrolysis process, a voltage greater than 1.23V (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/052C25B11/089C25B1/04C25B11/056C25B11/055C23C18/20C23C18/30C23C18/48
CPCC25B11/052C25B11/089C25B1/04C25B11/056C25B11/055C23C18/2086C23C18/48Y02E60/36
Inventor 郝伟举范金丽张怡然翁硕罗将
Owner UNIV OF SHANGHAI FOR SCI & TECH
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