Application of BN to electrochemical ammonia production

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

Active Publication Date: 2019-02-12
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electrochemical nitrogen reduction (NRR) has been favored by the scientific research community due to its simple equipment, easy operation, and environmental friendliness. The most critical factor for this method is to seek cata

Method used

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  • Application of BN to electrochemical ammonia production
  • Application of BN to electrochemical ammonia production
  • Application of BN to electrochemical ammonia production

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

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

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

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

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

[0029] From figure 1 It can be seen from A that the diffraction peaks of unstripped 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 ...

Example Embodiment

[0032] Example 2

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

Example Embodiment

[0034] Example 3

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

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PUM

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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

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IPC IPC(8): C25B1/00C25B11/06
CPCC25B1/00C25B11/051C25B11/057C25B11/075
Inventor 渠凤丽杜蕙同张亚于文旭孔耀
Owner QUFU NORMAL UNIV
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