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A kind of titanium diboride/boron carbide composite electrode and its preparation method and application

A titanium diboride and composite electrode technology, applied in the field of electrochemical catalysis, can solve the problems of low catalytic activity, high cost, and by-product generation

Active Publication Date: 2022-04-12
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, noble metals (such as nickel, cobalt or platinum) or other compounds (such as Fe 2 o 3 -CNT, Fe 3 o 4 or MoS 2 ) as an electrode, but the above electrode materials still have many disadvantages
For example, low catalytic activity, poor stability of electrode materials, by-products generated during the reaction, high cost
Therefore, there is no efficient and safe electrode that can be used to catalyze the reduction of nitrogen to ammonia

Method used

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  • A kind of titanium diboride/boron carbide composite electrode and its preparation method and application
  • A kind of titanium diboride/boron carbide composite electrode and its preparation method and application
  • A kind of titanium diboride/boron carbide composite electrode and its preparation method and application

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preparation example Construction

[0039] Please refer to Figure 6 , a method for preparing a titanium diboride / boron carbide composite electrode provided in an embodiment of the present invention, comprising:

[0040] Take substrate 1, carry out cleaning operation to described substrate 1, deposit composite coating 2 on described substrate 1 after cleaning, described composite coating 2 comprises titanium diboride and boron carbide 23, obtains titanium diboride / Boron carbide composite electrode.

[0041] The preparation method provided in the embodiment of the present invention can prepare a titanium diboride / boron carbide composite electrode with excellent electrocatalytic nitrogen reduction to ammonia gas performance through a simple process, which is simple to prepare and low in cost, and can be used in harsh conditions Higher lifespan and strong practicability.

[0042] In a preferred embodiment of the present invention, a composite coating 2 is deposited on the substrate 1 after cleaning, and during t...

Embodiment 1

[0050] Step 1: Wash the titanium mesh in acetone, absolute alcohol, and deionized water for 10 minutes, and then dry it in an oven overnight.

[0051] Step 2: Fix the titanium mesh on the baffle and hang it in the magnetron sputtering equipment, keep the substrate parallel and facing the target, the distance between the target and the substrate surface is 8cm, and set the rotation speed of the titanium mesh at the same time It is 2r / min. Then carry out the vacuuming operation. In the vacuuming process, first open the mechanical pump and the rough pumping valve, and when the pressure of the deposition chamber of the magnetron sputtering equipment is pumped to 10Pa, open the maintenance valve to pump the pressure of the deposition chamber to 4Pa. , then close the rough valve, open the high valve, and finally pump the deposition chamber to 5×10 -3 Pa.

[0052] Step 3: The cleaning operation of the target material and the sample is then carried out. During the cleaning process o...

Embodiment 2

[0056] Step 1: Wash the titanium sheet in acetone, absolute alcohol, and deionized water for 20 minutes, and then dry it in an oven overnight.

[0057] Step 2: Fix the titanium sheet on the baffle and hang it in the magnetron sputtering equipment, keep the substrate parallel and facing the target, the distance between the target and the substrate surface is 20cm, and set the rotation speed of the titanium sheet at the same time It is 2r / min. Then carry out the vacuuming operation. In the vacuuming process, first open the mechanical pump and the rough pumping valve, and when the pressure of the deposition chamber of the magnetron sputtering equipment is pumped to 10Pa, open the maintenance valve to pump the pressure of the deposition chamber to 4Pa. , then close the rough valve, open the high valve, and finally pump the deposition chamber to 6×10 -3 Pa.

[0058] Step 3: The cleaning operation of the target material and the sample is then carried out. During the cleaning proce...

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Abstract

The invention provides a titanium diboride / boron carbide composite electrode and its preparation method and application, wherein the titanium diboride / boron carbide composite electrode includes a substrate and a composite coating on the substrate, the composite Coatings include titanium diboride and boron carbide. The titanium diboride coating can effectively improve the electrical conductivity of the composite coating; while the incorporation of boron carbide can effectively improve the catalytic activity of the composite coating. Therefore, the titanium diboride / boron carbide composite electrode can effectively improve the electrical conductivity and catalytic activity, and greatly increase the output of electrocatalytic nitrogen reduction to ammonia. The invention also provides a preparation method of the titanium diboride / boron carbide composite electrode. The titanium diboride / boron carbide composite electrode with excellent catalytic performance can be prepared through a simple process, which simplifies the preparation steps and reduces the cost. The invention also provides the application of the titanium diboride / boron carbide composite electrode in the electrocatalytic reduction of nitrogen.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to a titanium diboride / boron carbide composite electrode and its preparation method and application. Background technique [0002] Ammonia plays a very important role in human society. It can not only be used in chemical production, but also can promote the growth of crops. The use of electrocatalytic nitrogen reduction to generate ammonia (Nitrogen Reduction Reaction, NRR) technology is an effective solution. Whether the electrocatalytic reduction can be carried out efficiently has high requirements on the catalytic activity of the electrode; at the same time, in the aqueous solution, the hydrogen evolution reaction is easier to carry out than the NRR reaction, and the NRR reaction is often accompanied by side reactions. The above reasons all restrict the conversion rate of ammonia. [0003] At present, noble metals (such as nickel, cobalt or platin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/052C25B11/091C25B1/27B01J27/22
CPCC25B1/00B01J27/22C25B11/051C25B11/091B01J35/33C01B35/02C01B35/04C01C1/02Y02P20/52Y02P20/50
Inventor 唐永炳徐梦琦杨扬胡渊张文军
Owner SHENZHEN INST OF ADVANCED TECH