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Nickel-boron-nitrogen co-doped diamond electrode as well as preparation thereof and application thereof

A diamond electrode and co-doping technology, applied in the field of electrochemistry, can solve the problems of unfavorable promotion and use, low energy utilization rate, easy deactivation, etc., and achieve strong electrocatalytic activity and physical and chemical stability, high catalytic activity and stable properties, high hydrogen evolution and oxygen evolution potential

Pending Publication Date: 2018-05-04
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current constraints on electrocatalytic reduction of CO 2 The main factors are more by-products, low energy utilization rate and low catalyst activity.
[0003] Generally speaking, metal electrode materials have high catalytic activity, but the hydrogen evolution potential is low, and hydrogen evolution side reactions are prone to occur in the process of electrocatalysis, which reduces the current efficiency, and its cost is high, and it is easy to inactivate, which is not conducive to the promotion and use of large areas.
For example, copper (Cu) is a well-studied electrocatalytic reduction of CO 2 Metal materials with moderate CO binding energy can convert CO 2 completely reverted to CH 4 、C 2 h 4 However, due to the disadvantages of high cost, poor selectivity, low current efficiency, and easy deactivation, its application has been seriously affected
Although the traditional diamond electrode has stable chemical properties, it has high resistance and high energy consumption in the electrolysis process.

Method used

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  • Nickel-boron-nitrogen co-doped diamond electrode as well as preparation thereof and application thereof
  • Nickel-boron-nitrogen co-doped diamond electrode as well as preparation thereof and application thereof
  • Nickel-boron-nitrogen co-doped diamond electrode as well as preparation thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a nickel-boron-nitrogen co-doped diamond electrode, comprising:

[0042] (1) Take the metal titanium substrate, after sandblasting the metal titanium substrate, place it in acetone and alcohol for ultrasonic cleaning for 10 minutes, and then place the ultrasonic metal titanium substrate in a volume ratio of 1:15 with sulfuric acid and hydrogen peroxide pickling in the acid solution for 10min, after washing with water, place the metal titanium matrix in the suspension of nano-diamond powder for ultrasonic treatment for 1 hour for crystal planting, and then dry, wherein the average particle diameter of the suspension of diamond powder is 4nm, Zeta potential is about ±50mV.

[0043] (2) Using the hot wire chemical vapor deposition method, the metal titanium substrate after the crystal planting treatment is placed on the abutment, and the metal titanium substrate is kept in the middle of the hot wire and parallel to the hot wire, and the distance betw...

Embodiment 2

[0050] A method for preparing a nickel-boron-nitrogen co-doped diamond electrode, comprising:

[0051] (1) Take the silicon substrate, after sandblasting the silicon substrate, place it in acetone and alcohol for ultrasonic cleaning for 10 minutes, and then place the ultrasonic silicon substrate in a volume ratio of 1: (0.5-5): (1- 10) Rinse in a rinsing solution of hydrogen peroxide, ammonia water and deionized water for 5-15 minutes at a temperature of 80° C. After washing with water, place the silicon substrate in a suspension of nano-diamond powder for ultrasonic treatment for 1 hour The crystal is planted and then dried, wherein the average particle size of the diamond powder suspension is 5nm, and the Zeta potential is about ±55mV.

[0052] (2) Using the hot wire chemical vapor deposition method, place the silicon substrate after the crystal planting treatment on the abutment, keep the silicon substrate in the middle of the hot wire and parallel to the hot wire, and the ...

Embodiment 3

[0055] A method for preparing a nickel-boron-nitrogen co-doped diamond electrode, comprising:

[0056] (1) Take the niobium substrate, after sandblasting the silicon substrate, place it in acetone and alcohol for ultrasonic cleaning for 10 minutes, and then place the ultrasonic niobium substrate in a volume ratio of 1: (0.5-5): (1- 10) Rinse in a rinsing solution of hydrogen peroxide, ammonia water and deionized water for 5-15 minutes at a temperature of 80° C. After washing with water, place the niobium matrix in a suspension of nano-diamond powder for ultrasonic treatment for 1 hour The crystal is planted and then dried, wherein the average particle size of the diamond powder suspension is 5nm, and the Zeta potential is about ±55mV.

[0057](2) Using the hot wire chemical vapor deposition method, place the niobium substrate after the crystal planting treatment on the abutment, keep the niobium substrate in the middle of the hot wire and parallel to the hot wire, and the dist...

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Abstract

The invention provides a nickel-boron-nitrogen co-doped diamond electrode. The nickel-boron-nitrogen co-doped diamond electrode comprises a base body and a nickel-boron-nitrogen co-doped diamond filmlayer arranged on the surface of the base body, wherein the nickel-boron-nitrogen co-doped diamond film layer comprises a flat structural layer arranged on the surface of the base body and an array bump structure arranged on the surface of the flat structural layer. The array bump structure is arranged on the nickel-boron-nitrogen co-doped diamond film layer of the nickel-boron-nitrogen co-doped diamond electrode, so that a catalysis specific surface area can be provided; the nickel-boron-nitrogen co-doped diamond electrode has a very high hydrogen-evolution electric potential, very strong electrocatalytic activity and physical and chemical stability, has a very low resistance value, and can perform electrocatalytic reduction on carbon dioxide with high selectivity. The invention further provides preparation and application of the nickel-boron-nitrogen co-doped diamond electrode.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a nickel-boron-nitrogen co-doped diamond electrode and its preparation and application. Background technique [0002] The global use of fossil fuels as a major source of energy leads to the greenhouse gas carbon dioxide (CO 2 ) massive emissions. Electrocatalytic reduction of CO 2 It can be carried out at normal temperature and pressure, and the product is easy to adjust by changing the reaction conditions, and the CO 2 Converted to C1: carbon monoxide (CO), methane (CH 4 ), Methanol (CH 3 OH), formic acid (HCOOH), formaldehyde (HCHO); C2: ethanol (C 2 h 5 OH), acetic acid C 2 h 4 o 2 , Ethane (C 2 h 6 ); C3: propanol (CH 3 CH 2 CH 2 OH) and other substances, which can not only reduce CO 2 emissions, and CO 2 converted into valuable fuels or compounds to achieve CO 2 Recycling of waste, which has both environmental and economic benefits, has been highly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/04C25B11/06C23C16/27C23C16/56C23C12/02C25B3/25
CPCC23C12/02C23C16/271C23C16/278C23C16/56C25B3/25C25B11/091
Inventor 唐永炳杨扬谷继腾李子豪
Owner SHENZHEN INST OF ADVANCED TECH
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