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Preparation method and application of single-atom copper material

An atomic, in-situ technology, applied in the field of single-atom copper materials, can solve the problems of complex preparation process, high cost, low yield, etc., and achieve the effect of overcoming the preparation process, suppressing the hydrogen evolution reaction, and increasing the ammonia yield.

Inactive Publication Date: 2020-07-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, these two methods have disadvantages such as complex preparation process, low yield, and high cost, which limit their practical application and promotion.
[0005] However, so far, there is no prior art of high-efficiency single-atom copper electrocatalysts with good ammonia synthesis selectivity that are simple in process, can be prepared in large quantities and at low cost; this application aims to solve the above problems

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  • Preparation method and application of single-atom copper material
  • Preparation method and application of single-atom copper material
  • Preparation method and application of single-atom copper material

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0036] 1) Preparation of single-atom copper materials.

[0037] The inventor has studied: at first PTCDA is reduced, and make it incorporate hydronium ion (H 3 o + ). We recorded the cyclic voltammetry (CV) curves of PTCDA electrode in 1.0M HCl in a three-electrode electrolytic cell. In the first cycle, the cathode scan showed a reduction peak around -0.62V ( figure 1 a), corresponding to the reduction reaction of PTCDA and H 3 o + the incorporation process. During the subsequent anodic scan, an oxidation peak at +0.26V was observed. Thus, the electrodes exhibit re...

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Abstract

The invention relates to a method. With the method, single-atom copper is intercalated into the lattice structure of a molecule of 3,4,9,10-perylenetetracarboxylic dianhydride, namely PTCDA. The modified PTCDA can be used as an electrocatalyst to reduce nitrates or nitrites to synthetize ammonia. The single-atom catalyst can be obtained through a simple electrode in-situ self-reduction depositionmethod, and has the advantages of being simple in technology, capable of being prepared on a large scale, low in cost and the like. After the single-atom copper is intercalated into the PTCDA, the single-atom copper can be in coupling with ketonic oxygen in the molecule of PTCDA, and can also lead to slow hydrogen evolution reaction kinetics; and furthermore, because the copper can provide an appropriate NO3- reduction synthesis ammonia site, and then the selectivity of electrocatalyst synthesis ammonia is effectively improved.

Description

technical field [0001] The invention relates to the field of a single-atom copper material, in particular to a single-atom catalyst, and more specifically to the preparation and application of an electrocatalyst of a single-atom copper material used in the field of selective synthesis of ammonia. Background technique [0002] The synthesis of ammonia from nitrogen and hydrogen molecules (Haber-Bosch process) is one of the greatest inventions of the 20th century. Today, this more than 100-year-old production method is the main source of most of the world's synthetic ammonia, accounting for 90 percent of annual production. Ammonia and its derivatives (including urea) are important components of fertilizers. It is estimated that without the use of artificial fertilizers in the Haber-Bosch process, global food production could support only a fraction of the world's population today. However, since fossil fuels (mainly natural gas) are H 2 The main source of precursors will in...

Claims

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Application Information

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IPC IPC(8): B22F9/24C25B11/06C25B1/00B01J23/72
CPCB22F9/24C25B1/00B01J23/72C25B11/075C25B11/051B01J35/33
Inventor 王海辉陈高锋
Owner SOUTH CHINA UNIV OF TECH
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