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a fe-fe 3 o 4 Composite anode and method for preparing ferrate by electrolysis

A technology of fe-fe3o4 and composite anode, applied in the field of electrochemistry, can solve the problems such as the easy passivation of the anode surface, and achieve the effects of easy promotion, large market value, and increased production speed

Active Publication Date: 2022-08-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Fe-Fe that the present invention obtains 3 o 4 The anode overcomes the problem of easy passivation of the anode surface under high current density to a certain extent

Method used

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  • a fe-fe <sub>3</sub> o <sub>4</sub> Composite anode and method for preparing ferrate by electrolysis
  • a fe-fe <sub>3</sub> o <sub>4</sub> Composite anode and method for preparing ferrate by electrolysis

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Experimental program
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Embodiment

[0038] Fe in different proportions 3 O 4 The powder is mixed with iron powder, put into a mold, and pressed into a prefabricated block with a diameter of 12.4mm under a pressure of 15 MPa. The prefabricated block is sintered in a tube furnace under the protection of argon gas. The furnace is cooled to 100 ° C to obtain Fe-Fe 3 O 4 Composite anode. Different Fe 3 O 4 Content of Fe-Fe 3 O 4 The X-ray diffraction pattern of the composite anode is as follows: figure 1 shown. There are strong diffraction peaks around 44.764 °, 65.164 °, 82.528 ° in the spectrum, which are attributed to the diffraction of (110), (200), (311) crystal planes of iron; in the spectrum around 35.4 °, 43.1 ° and 62.5 ° It shows strong diffraction peaks, which are respectively assigned to the diffraction of (311), (400) and (440) crystal planes of ferric oxide. It can be seen that with the protection of inert gas, a large amount of iron is not oxidized after sintering and remains in a simple stat...

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Abstract

The present invention relates to a Fe-Fe 3 O 4 Composite anode and method for preparing ferrate by electrolysis, iron powder and 1-80% Fe of the mass of iron powder 3 O 4 The powders are mixed and ground into a mold, and pressed into preforms under a pressure of 10‑30 MPa, and then the preforms are sintered under the protection of an inert atmosphere to obtain Fe‑Fe 3 O 4 Composite anode; Fe‑Fe 3 O 4 The composite anode is installed in an electrolytic cell, and ferrate is prepared by electrolysis in a strong alkaline solution. Using Fe-Fe of the present invention 3 O 4 The preparation of ferrate by composite anode electrolysis reduces the passivation tendency of the anode surface under high current density, and has the advantages of high current efficiency and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a Fe-Fe 3 O 4 Composite anode and method for preparing ferrate by electrolysis. Background technique [0002] With the continuous development of society, human beings urgently need various water treatment methods with good effects without causing secondary pollution. Sterilization, disinfection and sewage purification by highly efficient strong oxidants are commonly used treatment methods. Ferrate is a hexavalent iron salt with unique chemical properties, including: ① a high reduction potential of a standard half-cell (2.2V relative to a standard hydrogen electrode), ② its reduction does not produce toxic by-products, ③ reduction products It can also act as a coagulant. Fe in ferrate 6+ The reduction potential of ions is higher than other commonly used water treatment oxidants, such as chlorine (1.358 V vs. standard hydrogen electrode) and ozone (2.076 V...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B1/01
CPCC25B11/04C25B1/00
Inventor 李志林金雅杰王峰刘景军吉静张正平窦美玲牛津
Owner BEIJING UNIV OF CHEM TECH