Application of bn in electrochemical ammonia production

An electrochemical and ammonia technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve problems such as negative impact on the environment, and achieve the effects of energy saving, high catalytic activity and selectivity, and simple treatment plan.

An electrochemical and ammonia technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve problems such as negative impact on the environment, and achieve the effects of energy saving, high catalytic activity and selectivity, and simple treatment plan.

CN109321930BActive Publication Date: 2020-06-09QUFU NORMAL UNIV
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  • Application of bn in electrochemical ammonia production
  • Application of bn in electrochemical ammonia production
  • Application of bn in electrochemical ammonia production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the carbon paper working electrode deposited with BN nanosheets is prepared by the following steps:

[0026] (1) Stripping of BN nanosheets: Add 1.5 mg of commercially available block BN to 2.0 mL of a mixture of distilled water and ethanol with a volume ratio of 1:1 and crush it with an ultrasonic crusher for 2.0 hours to obtain a mixed solution A. Contains exfoliated BN nanosheets;

[0027] (2) Configuration of the catalyst solution: take 0.98 mL of the mixed solution A in step (1) in a centrifuge tube, add 0.02 mL of 5 wt % naphthol solution, and sonicate for 0.5 hours to obtain the mixed solution B;

[0028] (3) Draw the mixed solution B and drop it on the surface of carbon paper to obtain the working electrode.

[0029] From figure 1 It can be seen in A that the diffraction peaks of unexfoliated bulk BN at 26.7°, 41.5°, 43.7°, 50.0°, 54.9° and 76.1° can be attributed to the (002), (100 ), (101), (102), (004) and (110) phases (JCPDS No. 45-089...

Embodiment 2

[0033] As described in Example 1, the difference is that the amount of block BN in step (1) is 1.0 mg.

Embodiment 3

[0035] As described in Example 1, the difference is that the crushing time of the ultrasonic crusher in step (1) is 1.5h.

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Abstract

The invention relates to application of BN to electrochemical ammonia production, and belongs to the field of nano new materials. A BN nanosheet is used as a nitrogen reduction catalyst to be used forelectrochemical synthesizing of ammonia gas under acidic conditions. According to the application, the BN nanosheet is firstly used as the nitrogen reduction catalyst to be used for electrochemical synthesizing of the ammonia gas under the acidic conditions, high catalytic activity and selectivity are shown, and as a metal-free material, BN is more stable in actual use and is more environment-friendly. According to the application, the treatment scheme of the BN nanosheet is simple and easy, operation is easy, all processes do not involve high temperature reactions, energy is saved, and the application is more consistent with the concept of sustainable development; the BN nanosheet catalyst is used for electrochemical synthesizing of the ammonia gas under the acidic conditions, and the Faraday efficiency as high as 4.7% is shown, and the performance is higher than that of most currently-proven water-based nitrogen reduction catalysts; and in addition, the good selectivity and stability are achieved, and the BN nanosheet is an excellent new nitrogen reduction catalyst.

Description

technical field [0001] The invention relates to the application of BN in electrochemical ammonia production, belonging to the field of new nanometer materials. Background technique [0002] As a building block of reactive nitrogen, ammonia plays an essential role in the manufacture of fertilizers, pharmaceuticals, resins, explosives and dyes, among others. With the further demand of production activities and the development of social economy, the demand for ammonia in industry is also increasing, which thus promotes the exploration of green and sustainable ammonia production methods in the scientific research community. In today's industrial production, the Haber method is still the most important ammonia production method and occupies a pivotal position. However, this method has also brought huge environmental pollution while being widely used, such as the demand for fossil energy. and carbon dioxide emissions. This approach obviously does not conform to the concept of gr...

Claims

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Application Information

Patent Timeline
09 Jun 2020
Publication
CN109321930B
IPC
C25B1/00; C25B11/06
CPC
C25B1/00; C25B11/051; C25B11/057; C25B11/075
Inventors
渠凤丽; 杜蕙同