IrOx electrode prepared through cyclic thermo oxidation method

A thermal oxidation, electrode technology

Active Publication Date: 2012-11-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Put metal iridium in a high-temperature alkaline environment and heat it for a period of time to form IrO x However, even if the current method is used, there will be a big gap in the performance of electrodes produced in the same batch. The production method and process of iridium electrodes are still being explored.

Method used

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  • IrOx electrode prepared through cyclic thermo oxidation method
  • IrOx electrode prepared through cyclic thermo oxidation method
  • IrOx electrode prepared through cyclic thermo oxidation method

Examples

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Embodiment 1

[0032] Embodiment 1: as figure 1 , 2 Shown is an embodiment of the unipolar iridium oxide electrode with one electrode core (5) of the present invention. The IrO prepared by the cyclic thermal oxidation method x electrode, which encapsulates an IrO x Electrode core (5); one end of the electrode core (5) is prepared by cyclic thermal oxidation on the outer surface of the iridium metal core (1) to generate a layer of IrO x The conductor of the film (2); the other end of the electrode core is composed of a wire (3); the IrO x When the electrode core (5) is encapsulated in the insulating layer (4), a part of the exposed outside is used for pH sensing. The size of the electrode core (5) can be changed within a certain range. When the size is small, it can be made into a microelectrode, and when the size is large, it can be made into a common electrode.

[0033] The iridium metal core (1) can be metal iridium wire, metal iridium sheet or metal iridium powder consolidated togeth...

Embodiment 2

[0036] Embodiment 2: The difference from the above embodiment is that the electrode core (5) can be prepared as an array of at least two IrO x electrode core.

[0037] A kind of IrO prepared by the cyclic thermal oxidation method adopted by the present invention x The manufacture method of electrode, it comprises the steps:

[0038] A. Clean and pre-treat the surface of the iridium metal core (1). The pretreatment is to carry out ultrasonic cleaning in acid solution first, and then carry out ultrasonic cleaning in deionized water.

[0039] B. Soak the pretreated iridium metal core (1) in the solution to activate the metal surface. The soaking solution is concentrated alkali;

[0040] C. The soaked iridium metal core (1) is heated at a constant temperature in a high temperature environment for a period of time, and then quenched immediately after taking it out; the high temperature treatment temperature is 700~850°C, and the heating time is 30min~2h; the quenching The medi...

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Abstract

The invention relates to an iridium oxide (IrOx) electrode prepared through a cyclic thermo oxidation method. The IrOx electrode comprises an insulation layer, wherein an electrode core is packaged in the insulation layer; and one end of the electrode core is a conductor having an IrOx surface film prepared through cyclic thermo oxidation, the other end of the electrode core is formed by a lead, and a part of the IrOx electrode core is uncovered in the open air for pH induction when the IrOx electrode core is packaged into the insulation layer. A high temperature heating and quenching technology in the cyclic thermo oxidation method is repeated at least twice in order to generate the IrOx film with strong surface adhesion and strong mechanical strength; and then the IrOx electrode is immersed in distilled water for hydration, so the sensitivity of the electrode is close to a Nernst response. The IrOx-pH electrode provided in the invention has the advantages of small volume, high sensitivity, good stability, convenient making, wide application fields and the like.

Description

technical field [0001] The invention belongs to the technical field of sensor analysis and testing, in particular to an iridium oxide (IrO x ) electrode, which is not only suitable for pH value testing in conventional solution environments, but also especially suitable for systems where glass electrodes are not suitable for applications such as micro-areas, on-line detection of living organisms, and strong corrosion systems. Background technique [0002] In the fields of industrial production, daily life and scientific research, the pH value is a very important parameter, and it is of great significance to monitor and detect the pH value of different systems. Metal / metal oxide electrodes are attracting more and more attention because of their convenient fabrication, low cost, fast response, high mechanical strength, good rigidity, and easy miniaturization. Among them, the iridium oxide electrode is the most promising metal / metal oxide electrode. [0003] Iridium oxide can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 金莹文磊黄菲菲任学冲崔萌萌
Owner UNIV OF SCI & TECH BEIJING
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