Precious metal ultramicroelectrode and preparation method thereof

A technology of ultra-micro electrodes and precious metals, applied in the field of electrochemistry, can solve the problems of difficult preparation, difficult preparation process, etc., and achieve the effect of overcoming the complexity of the preparation process, controllable size and shape, and simple preparation process

Inactive Publication Date: 2012-08-01
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there are also problems. Its preparation is usually complicated and difficult. In addition, the size and shape of ultramicroelectrodes are not easy to control, etc.
[0005] In the process of

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  • Precious metal ultramicroelectrode and preparation method thereof
  • Precious metal ultramicroelectrode and preparation method thereof
  • Precious metal ultramicroelectrode and preparation method thereof

Examples

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Embodiment 1

[0055] According to an embodiment of the present invention, a method for preparing a platinum ultramicroelectrode is provided. In this embodiment, platinum Pt is selected as the precious metal, and the preparation method of the platinum ultramicroelectrode is as follows:

[0056] Step 1: Drawing of the glass capillary, that is, select a clean glass capillary with an inner diameter of 0.58mm and an outer diameter of 1.0mm, and use a microtube drawing instrument to draw one end of the glass capillary at a heating index of 760 degrees. A tip with an inner diameter of 60 μm;

[0057] Step 2: Cut the copper wire with a diameter of 0.5mm into 10cm long sections, keep the copper wires straight for use; then cut the platinum wires with a diameter of 25μm into small sections with a length of about 2cm; One end of the wire is dipped in conductive silver glue, and one end of the above cut platinum wire is glued to the end of the copper wire dipped in conductive silver glue. After drying...

Embodiment 2

[0078]Different from the foregoing embodiments, in this embodiment, the preparation method of platinum ultramicroelectrodes is as follows:

[0079] Step 1: Drawing of the glass capillary, namely: select a clean glass capillary with an inner diameter of 0.54mm and an outer diameter of 0.8mm, and use a microtube drawing instrument to draw one end of the glass capillary at a heating index of 740 degrees. A tip with an inner diameter of 20 μm;

[0080] Step 2: Cut the copper wire with a diameter of 0.4mm into 8cm long pieces, keep the copper wire straight for later use; then cut the platinum wire with a diameter of 22μm into small sections with a length of about 1.8cm; One end of the copper wire is dipped in conductive silver glue, and one end of the above-mentioned cut platinum wire is glued to the end of the copper wire dipped in conductive silver glue. After drying in the air for 4 minutes, put it into an oven with a temperature of 95°C for baking. 12min, so that the conductiv...

Embodiment 3

[0100] Different from the foregoing embodiments, in this embodiment, the preparation method of platinum ultramicroelectrodes is as follows:

[0101] Step 1: Drawing of the glass capillary, that is, select a clean glass capillary with an inner diameter of 0.62mm and an outer diameter of 1.2mm, and use a microtube drawing instrument to draw one end of the glass capillary at a heating index of 780 degrees. A tip with an inner diameter of 100 μm;

[0102] Step 2: Cut the copper wire with a diameter of 0.6mm into small sections of 11cm long, keep the copper wire straight for use; then cut the platinum wire with a diameter of 28μm into small sections of about 2.2cm in length; One end of the copper wire is dipped in conductive silver glue, and one end of the above-mentioned cut platinum wire is glued to the end of the copper wire dipped in conductive silver glue. After drying in the air for 7 minutes, put it into an oven with a temperature of 120°C for baking. 20min to fully cure th...

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Abstract

The invention discloses a precious metal ultramicroelectrode and a preparation method thereof. The preparation method includes drawing one end of a glass capillary into a sharp end with an internal diameter of 20-100 micrometers in a stretching mode; dipping silver conductive adhesive at one end of a copper wire and bonding the end to one end of a precious metal wire to enable the silver conductive adhesive to be cured at a high temperature; penetrating the bonded copper wire and the precious metal wire through the glass capillary after drawing, enabling the end portion of the precious metal wire far from the copper wire to stretch out 1-1.5cm from the sharp end of the glass capillary; and obtaining the precious metal ultramicroelectrode after fusion or sealing, washing, etching and insulating treatment to the sharp end of the glass capillary containing the precious metal wire. The precious metal ultramicroelectrode and the preparation method thereof have the advantages of simple preparation process, small preparation difficulty, and controllable size and shape.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular, to a noble metal ultramicro electrode and a preparation method thereof. Background technique [0002] At present, ultramicroelectrode is a newly developed field in electrochemical research. In the 1960s, it was discovered that ultramicroelectrodes have many excellent characteristics, such as high mass transfer rate, small time constant, low IR drop, high signal-to-noise ratio, high current density, etc. Electrodes are incomparable. [0003] Ultramicro electrodes generally include two types of electrodes whose one-dimensional size is micron and nanoscale. Due to its own characteristics, it has aroused extensive research interest. Since the electrode exhibits many excellent electrochemical properties when the one-dimensional size of the electrode is reduced from the millimeter level to the micron level, it is theoretically more suitable for the study of thermodynamics and...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 卢小泉何红霞杜捷胡娅琪周喜斌茹婧
Owner NORTHWEST NORMAL UNIVERSITY
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