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CuPc-at-Ti3C2TxMXene catalytic material, electrode and application of CuPc-at-Ti3C2TxMXene catalytic material and electrode in nitrate radical reduction

A catalytic material and electrode technology, applied in the application field of nitrate reduction to produce ammonia, can solve the problems of low conversion rate, poor selectivity to ammonia, by-products, and high nitrite concentration, and achieve low by-products and easy-to-obtain raw materials. , easy to operate effect

Pending Publication Date: 2021-01-12
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current electrochemical reduction of nitrate still has problems such as low conversion rate, poor selectivity to ammonia, and high concentration of by-product nitrite. Therefore, it is urgent to introduce an efficient and highly selective nitrate electroreduction catalyst. Material

Method used

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  • CuPc-at-Ti3C2TxMXene catalytic material, electrode and application of CuPc-at-Ti3C2TxMXene catalytic material and electrode in nitrate radical reduction
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  • CuPc-at-Ti3C2TxMXene catalytic material, electrode and application of CuPc-at-Ti3C2TxMXene catalytic material and electrode in nitrate radical reduction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] CuPc@Ti 3 C 2 T x The synthesis of MXene catalytic materials, the specific steps are as follows:

[0029] At room temperature, measure 5mg / ml of Ti 3 C 2 T x MXene (purchased from Shandong Xene Research New Material Technology Co., Ltd.) 1mL in a flask, and then add 49 mL of anhydrous methanol to obtain Ti 3 C 2 T x MXene solution.

[0030] According to the ratio of the amount of different substances of copper and titanium (the ratio of Cu to Ti is 10%, 20%, 30%, and 50% respectively), add 100mL copper phthalocyanine ethanol solution dropwise to the The above Ti 3 C 2 T x In the MXene solution, the addition rate was 1mL / min. After the addition was completed, it was centrifuged at a centrifugal speed of 7800 rpm for 10 minutes, washed with absolute ethanol, and centrifuged and washed 3 times in total. Finally, the supernatant after centrifugation was poured out to obtain the The precipitate was vacuum-dried at 60°C for 3 hours, and it was CuPc@Ti 3 C 2 ...

Embodiment 2

[0033] The preparation of an electrode for electrocatalytic reduction of nitrate to produce ammonia, the specific steps are as follows:

[0034] Weigh the vacuum-dried CuPc@Ti 3 C 2 T x Mix MXene catalytic material with 100 microliters of absolute ethanol and 100 microliters of Nafion binder solution (acting as a binder, a commercially available product) to obtain a catalyst slurry; then use a pipette gun to draw 100 microliters of catalyst slurry for drop coating On a carbon cloth hydrophilic surface treated with oxygen plasma; the carbon cloth after drop coating was dried at room temperature for 3 h, thus preparing CuPc@Ti 3 C 2 T x MXene composite electrode device, an electrode for electrocatalytic reduction of nitrate to produce ammonia, CuPc@Ti on carbon cloth 3 C 2 T x The loading capacity of MXene catalytic material is 2.7mg / cm 2 .

Embodiment 3

[0036] CuPc@Ti 3 C 2 T x MXene catalytic materials were tested by an electrochemical workstation (model CorrTest CS310). Before the test, the working electrode was connected to the carbon cloth of the electrode for electrocatalytic reduction of nitrate to produce ammonia, the platinum sheet was used as the counter electrode, the calomel electrode was used as the reference electrode, and the electrolytic cell was an H-type electrolytic cell. After the assembly is completed, 0.5mol / L sodium sulfate is used as the electrolyte, and nitrate with a nitrogen concentration of 30mg / L~200mg / L is used as the electrolyte. The main electrochemical test is linear voltammetry scanning method, and the scanning potential range is -0.1~ -1.85V, constant voltage method, applied voltage range -1.45~-1.85V.

[0037] attached image 3 It is the linear sweep voltammetry curve of CuPc, MXene and 20% CuPc@MXene catalytic materials. It can be seen from the figure that the composite material shows ...

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Abstract

The invention discloses a CuPc-at-Ti3C2Tx MXene catalytic material, an electrode preparation method thereof and application of the CuPc-at-Ti3C2Tx MXene catalytic material in nitrate reduction ammoniaproduction. The method comprises the steps: obtaining the CuPc-at-Ti3C2Tx MXene catalytic material by mixing a CuPc ethanol solution and a Ti3C2Tx MXene solution, centrifugally washing and drying precipitates; and then loading the CuPc-at-Ti3C2Tx MXene catalytic material on the hydrophilic surface of carbon cloth to obtain the electrode for producing ammonia by electrocatalytic reduction of nitrate, which is used for producing ammonia by electrocatalytic reduction of nitrate. An electrode prepared from the CuPc-at-Ti3C2Tx Mxene composite material disclosed by the invention has the characteristics of good cycling stability and high electrochemical activity.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, in particular to Ti 3 C 2 T x The synthesis method of MXene and copper phthalocyanine (CuPc) composite material and its electrode preparation method, and the application of the electrode in the reduction of nitrate to ammonia. Background technique [0002] Ammonia is an important raw material for the synthesis of nitrogen fertilizers, refrigerants, nitric acid, plastics, fibers and other chemical products, and it is also a promising carrier of high specific energy. NH 3 The traditional synthesis method of the present invention is through the Haber-Bosch process, however, the synthesis conditions of this process are very harsh, and while generating a large amount of energy consumption, it also inevitably produces a large amount of greenhouse gases. Based on these difficulties, the electrochemical reduction of ammonia using nitrate as a nitrogen source has attracted more and more a...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J27/22C25B1/00C02F1/461C02F1/467C02F101/16
CPCB01J31/183B01J27/22C25B1/00C02F1/4676C02F1/46109B01J2531/16C02F2101/163C02F2001/46142B01J35/33
Inventor 路建美贺竞辉
Owner SUZHOU UNIV
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