Reference electrode and use method thereof
A reference electrode, ionic liquid technology, applied in the field of electrochemical testing, can solve the problems of complexity and inapplicability, and achieve the effect of excellent conductivity
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Embodiment 1
[0065] This embodiment provides a reference electrode, the structure of the reference electrode is as follows figure 1 As shown, it includes an outer tube 101, an inner filling liquid 102 located in the outer tube 101, a porous substance 103 encapsulated at one end of the outer tube 101, a sealing cap 104 sealed at the other end of the outer tube, fixed on the sealing cap 104 and immersed in the A wire 105 in the inner filling liquid 102 , and a wire 106 connected to the wire 105 and extending to the outside of the sealing cap 104 . The reference electrode also includes a rubber cap 107 that is sleeved on the side of the outer tube 101 to encapsulate the porous substance 103, and an empty cavity 108 that is arranged on the outer side of the outer tube 101 near the end of the sealing cap 104. The empty cavity 108 is in contact with the outer tube 101. The inner spaces of the tubes 101 are connected.
[0066] In the reference electrode provided in this embodiment, the inner fil...
Embodiment 2
[0072] This embodiment provides a method for using the reference electrode described in Embodiment 1, the specific method is:
[0073] The reference electrode prepared in Example 1, the working electrode and the counter electrode were used to form a three-electrode system, and the electrochemical test was carried out in a five-neck flask for the aqueous solution to be tested. Since the filling liquid diethylmethylamine trifluoromethanesulfonate ([dema]TfO) in the reference electrode is a hydrophilic ionic liquid with strong water absorption, it is used in conjunction with a salt bridge.
[0074] In this embodiment, the schematic diagram of using the reference electrode in conjunction with the salt bridge is as follows Figure 2a As shown, the reference electrode is immersed in the salt bridge. The salt bridge includes a glass tube 201 with one end closed by a porous substance 203 and the other end open. The glass tube 201 is filled with a salt bridge filling solution 202 . In...
Embodiment 3
[0077]In this example, the cyclic voltammetry curve of ferrocene in ionic liquid was tested with the reference electrode provided in Example 1 at different temperatures within the temperature range from room temperature (25° C.) to 250° C. The properties of ferrocene are very stable, and it is usually used as a standard substance for calibration. In this test, it is used as an internal reference, which proves that the reference electrode of the present invention is stable and reliable, and is still applicable in high temperature environments.
[0078] An appropriate amount of ferrocene was dissolved in ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonic acid to prepare a ferrocene solution with a concentration of 10 mM, and a stirring bar was added to magnetically stir until the ferrocene was completely and fully dissolved.
[0079] A 10mm*10mm platinum sheet is used as a working electrode, a graphite electrode is used as a counter electrode, and a reference elect...
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Abstract
Description
Claims
Application Information
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