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Preparation method and application of MnO/C positive electrode electrocatalyst

An electrocatalyst and anode technology, which is applied in the field of MnO/C anode electrocatalyst preparation, can solve the problems of high oxygen evolution overpotential, surface coating dissolution, poor cycle stability, etc., achieve high catalytic activity, improve mineralization ability, The effect of enhancing stability

Active Publication Date: 2018-11-13
合肥庐阳科技创新集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of oxidation, electrodes usually have disadvantages such as high oxygen evolution overpotential, high energy consumption, high preparation cost, poor cycle stability, easy corrosion of electrodes or dissolution of surface coating, etc.

Method used

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  • Preparation method and application of MnO/C positive electrode electrocatalyst
  • Preparation method and application of MnO/C positive electrode electrocatalyst
  • Preparation method and application of MnO/C positive electrode electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 0.3g of manganese acetate and 0.3g of polyacrylonitrile powder into 10mL of N,N-dimethylformamide and stir to form a transparent solution; soak 0.5g of the cut carbon felt in the transparent solution for 5h, take it out and dry it in the air. Then put it in an oven at 220°C for 1 hour; soak the pre-oxidized carbon felt in the remaining transparent solution for 0.5 hour, take it out and dry it, and put it in an oven at 220°C for 1 hour; repeat the above operation until it is transparent The solution was completely adsorbed on the carbon felt; the final pre-oxidized carbon felt was put into a tube furnace, and was heat-treated at 900 °C for 1 h under the protection of nitrogen to obtain the MnO / C composite material.

[0030] In the single-chamber three-electrode system, the prepared MnO / C composite was used as the anode, the platinum wire was used as the counter electrode, and the calomel electrode was used as the reference electrode. -1 Na 2 SO 4 As electrolyt...

Embodiment 2

[0032] Dissolve 0.3g of manganese acetate and 0.06g of polyacrylonitrile powder into 6mL of N,N-dimethylformamide and stir to form a transparent solution; soak 0.29g of cut carbon paper in the transparent solution for 10h and take it out to dry. Then put it in an oven at 220°C for 1 hour; soak the pre-oxidized carbon paper in the remaining transparent solution for 0.5 hours, take it out and dry it, and place it in the oven for pre-oxidation treatment for 1 hour; repeat the above operation until the transparent solution is completely Adsorbed onto carbon paper; put the final pre-oxidized carbon paper into a tube furnace, and heat-treat at 700°C for 5h under the protection of nitrogen to obtain MnO / C composite material.

[0033] In the single-chamber three-electrode system, the prepared MnO / C composite was used as the anode, the platinum wire was used as the counter electrode, and the calomel electrode was used as the reference electrode. -1 Na 2 SO 4 As electrolyte, 30mL·s -...

Embodiment 3

[0035] Dissolve 0.3g of manganese acetate and 3g of polyacrylonitrile powder into 27mL of N,N-dimethylformamide and stir to form a transparent solution; soak 1.1g of the cut carbon fiber in the transparent solution for 24 hours, take it out and dry it, and place it Pre-oxidize in an oven at 220°C for 1 hour; soak the pre-oxidized carbon fiber in the remaining transparent solution for 1 hour, take it out and dry it, and place it in the oven for pre-oxidation treatment for 1 hour; repeat the above operation until the transparent solution is completely adsorbed on the carbon fiber ; put the above-mentioned final pre-oxidized carbon fibers into a tube furnace, and heat-treat at 1000° C. for 1 h under the protection of nitrogen to obtain a MnO / C composite material.

[0036] In the single-chamber three-electrode system, the prepared MnO / C composite was used as the anode, the platinum wire was used as the counter electrode, and the calomel electrode was used as the reference electrode...

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Abstract

The invention discloses a preparation method and application of a MnO / C positive electrode electrocatalyst. A cheap and easily available carbon material is selected as a base material, the surface ofthe carbon material is loaded with pure-phase MnO by a simple impregnation and high temperature heat treatment process, the prepared MnO / C composite material is used as a positive electrode of a battery, and oxygen gas is catalyzed to oxidize dye wastewater at low voltage. The MnO / C positive electrode electrocatalyst not only greatly improves the mineralization ability of the dye wastewater and shortens the degradation time, but also has good cycle stability.

Description

technical field [0001] The invention relates to a preparation method and application of a MnO / C anode electrocatalyst, belonging to the technical field of organic polluted wastewater treatment. Background technique [0002] Electrochemical advanced oxidation technology, especially heterogeneous electrocatalytic oxidation, is widely used in printing and dyeing wastewater, medical wastewater, coking wastewater, landfill leachate, manufacturing wastewater, etc. It has been widely used in water treatment fields such as leather wastewater. Among them, electrocatalytic oxidation is mainly divided into direct oxidation and indirect oxidation. In the direct oxidation process, the pollutants first migrate to the electrode surface, and are oxidized and removed by electron transfer at the anode. The indirect oxidation is to use the oxidizing species (OH, H 2 o 2 , O 3 and OCl – etc.) to remove pollutants. Therefore, the selection of electrode materials is a key factor in determi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90C02F1/72
CPCC02F1/725H01M4/9016H01M4/9083Y02E60/50
Inventor 孙敏乔梦霞翟林峰张锋王华林
Owner 合肥庐阳科技创新集团有限公司
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