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Preparation method and electrochemical application of a porous carbon-supported nitrogen-containing bimetallic catalyst

A bimetallic catalyst and porous carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of increasing particle stability, improving particle activity, and good conductivity

Active Publication Date: 2020-07-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main challenge for electrocatalytic removal of nitrate is to completely reduce it to harmless nitrogen through regulation

Method used

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  • Preparation method and electrochemical application of a porous carbon-supported nitrogen-containing bimetallic catalyst
  • Preparation method and electrochemical application of a porous carbon-supported nitrogen-containing bimetallic catalyst
  • Preparation method and electrochemical application of a porous carbon-supported nitrogen-containing bimetallic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 340 mg of copper nitrate trihydrate and 480 mg of triethylenediamine to 15 mL of N, N-dimethylformamide (DMF), and drop into 10 mL of terephthalic acid that is 70 g / L pre-configured and dissolved in DMF, And 15mL of pre-configured palladium acetylacetonate solution dissolved in DMF with a concentration of 6g / L, mixed and stirred;

[0033] (2) Take 1.0 g of ordered mesoporous carbon material, add it to the mixed solution obtained in step (1), and stir evenly;

[0034] (3) Place the homogeneous system obtained in step (2) in a hydrothermal kettle, heat in an oven at 150°C, react for 24 hours, filter, wash with DMF three times, and dry;

[0035] (4) Place the material obtained after step (3) drying in a tube furnace with a nitrogen atmosphere, and bake at 800°C for 2h to obtain a mesoporous carbon-supported nitrogen-containing copper-palladium bimetallic catalyst; the prepared mesoporous carbon-supported The XRD spectrum of the nitrogen-containing bimetallic catal...

Embodiment 2

[0039] The preparation method of porous carbon-supported nitrogen-containing bimetallic catalyst and its electrochemical application are as in Example 1. The difference is that in the catalyst preparation process, the addition of ordered mesoporous carbon is 0.8g, and the concentration of palladium acetylacetonate solution is 4.8g / L. The properties of the obtained electrocatalytic reduction of nitrate are shown in Table 1.

Embodiment 3

[0041] The preparation method of the porous carbon-supported nitrogen-containing bimetallic catalyst and its electrochemical application are as in Example 1, except that during the preparation of the catalyst, it is heated in an oven at 120° C. for 48 hours. The properties of the obtained electrocatalytic reduction of nitrate are shown in Table 1.

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Abstract

The invention provides a preparation method of porous carbon-supported nitrogen-containing bimetallic catalyst and application of the porous carbon-supported nitrogen-containing bimetallic catalyst inthe aspect of electrochemical reduction of nitrate in water. The preparation method of the catalyst comprises the following steps: sequentially adding copper nitrate trihydrate, triethylene diamine,a terephthalic acid solution and a precursor solution containing noble metal Pd or Pt into DMF; then dispersing the porous carbon carrier in the mixed solution and moving to a hydrothermal kettle forheating reaction to obtain a solid material; roasting the obtained solid material to obtain a porous carbon-supported nitrogen-containing bimetallic catalyst; the catalyst is coated on an electrode sheet to prepare a working electrode module, and the nitrate in water is reduced by electrocatalysis. The nitrogen-containing bimetallic catalyst obtained by the preparation method of porous carbon-supported nitrogen-containing bimetallic catalyst and electrochemical application thereof has high activity and high nitrogen selectivity for the electrochemical reduction of nitrate, and has higher removal efficiency under the condition that the pH value of a water body is neutral; the porous carbon carrier plays a role of dispersing active components and shows good stability.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of a porous carbon-loaded nitrogen-containing bimetallic catalyst and its application in electrocatalytic reduction of nitrate wastewater. Background technique [0002] The balance of nitrogen is achieved in nature through the nitrogen cycle. However, with the intervention of human activities, such as the synthesis of excessive nitrogen fertilizers through nitrogen fixation reactions in agricultural production, and the burning of fuel in production and life, the original nitrogen cycle balance in nature has been seriously damaged. Nitrogen-containing compounds of different valences are mostly present in groundwater, rivers and lakes in the form of the highest oxidation state of nitrogen - nitrate. The accumulation of a large amount of nitrate pollution will lead to eutrophication of the water body and destroy the original ecological balance of the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/461C02F1/70C02F101/16
CPCB01J27/24C02F1/4676C02F2101/163
Inventor 滕玮张伟贤范建伟冉献强
Owner TONGJI UNIV
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