Self-adjusting working electrode and electrochemical infrared spectrum external reflection reaction tank

Abstract

The utility model discloses a self-adjusting working electrode and electrochemistry infrared spectrum external reflection reaction tank, the self-adjusting working electrode comprises a tubular electrode stem and a disk electrode, the upper end and the lower end of the electrode stem are respectively provided with an upper sealing cover and a lower sealing cover, the upper end of an electrode sealing piece is axially inserted into the lower sealing cover and the electrode stem, and the lower end of the electrode sealing piece is inserted into the disk electrode. An electrode binding post penetrating in the axial direction is fixedly installed in the middle of the upper sealing cover, and the lower end of the electrode binding post is connected with the tail end of the disc electrode through a wire. The electrochemical infrared spectrum external reflection reaction tank comprises a three-dimensional control device, a self-adjusting working electrode is mounted at the tail end of the three-dimensional control device, and when a movable disc electrode is in contact with an infrared crystal fixed at the bottom of the reaction tank, the self-adjusting working electrode is turned off. The disc electrode shifts to enable the plane of the disc electrode to be parallel to the plane of the infrared crystal so as to ensure the thickness and parallelism of the thin electrolyte layer between the disc electrode and the infrared crystal, and the problem that an existing detection mode is poor in reliability and repeatability is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrochemistry in situ detection technical field, concretely is self -adjusting working electrode and electrochemistry infrared spectrum outer reflection reaction pool. BACKGROUND

[0002] Infrared spectrum is a kind of molecular detection technology that application is very extensive, can provide the detailed information of molecular chemical structure.In situ electrochemistry infrared spectrum technology can prove the structure and change process of electrode / solution interface, and then analyzes electrochemistry reaction mechanism.In situ electrochemistry reflection infrared spectrum (IRAS, outer reflection) can effectively detect solution phase species information at electrode, is a powerful tool for detecting electrode interface reaction path.

[0003] In outer reflection detection mode, infrared light passes through infrared crystal, further passes through electrolyte layer and is reflected at working electrode and then enters infrared detector.Against the absorption of infrared light by electrolyte, a thin electrolyte layer between working electrode and infrared crystal needs to be controlled, and the thickness of thin liquid layer is about 1-10 microns.The thickness and parallelism of thin electrolyte layer directly affect the accuracy and reproducibility of IRAS data.In the existing outer reflection technology, the working electrode is a long straight rod working electrode, and it is difficult to ensure that the working electrode is completely perpendicular to the infrared crystal when the long straight rod working electrode approaches the infrared crystal.A slight tilt of the working electrode will result in uncontrollable thickness and parallelism of the thin electrolyte layer between the working electrode and the infrared crystal, causing poor accuracy and reproducibility of IRAS results. UTILITY MODEL CONTENT

[0004] The utility model aims at providing self -adjusting working electrode and electrochemistry infrared spectrum outer reflection reaction pool to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a self -adjusting working electrode, comprising a tubular electrode rod and a disc electrode, the upper and lower ends of the electrode rod are respectively provided with an upper sealing cover and a lower sealing cover, the outer side of the disc electrode is wrapped with an electrode sealing element, the upper end of the electrode sealing element is axially inserted into the lower sealing cover and the electrode rod, the middle part of the upper sealing cover is fixedly provided with an electrode terminal post axially penetrating, and the lower end of the electrode terminal post is connected to the tail end of the disc electrode by a wire.

[0006] Preferably, a sealing ring a is sleeved on the electrode terminal post, and the lower part of the upper sealing cover is pressed against the sealing ring a.

[0007] Preferably, a sealing ring b is sleeved on the upper part of the disc electrode, and the lower sealing cover is screwed to the electrode rod to press and seal the sealing ring b.

[0008] The utility model discloses electrochemical infrared spectrum outer reflection reaction pool, including reaction pool and base, the reaction pool fixed mounting is in the base, be provided with air inlet and air outlet respectively on the reaction pool, install three -dimensional control device on the base, the output of three -dimensional control device fixed mounting has electrode fixed arm, and the front end vertical installation working electrode of electrode fixed arm, and the lower end of working electrode reaches to the reaction pool, install the vertical reference electrode and counter electrode on the reaction pool, the bottom of reaction pool installs infrared crystal.

[0009] Preferably, the infrared crystal is one or a mixture of several of zinc selenide, calcium fluoride, silicon, germanium and diamond.

[0010] Compared with the prior art, the utility model has the beneficial effects that: the three -dimensional control device drives the three -dimensional movement of working electrode, when the disc electrode in self -adjusting working electrode contacts infrared crystal, can adjust the distance and parallelism between working electrode and infrared crystal through changing the relative position between disc electrode and infrared crystal when disc electrode contacts infrared crystal, ensure the reliability and repeatability of detection. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the cross section structure schematic drawing of the utility model working electrode;

[0012] Figure 2 It is the structure schematic drawing of the utility model reaction pool.

[0013] In the drawing: 1, reaction pool;2, working electrode;201, electrode rod;202, upper sealing cover;203, lower sealing cover;204, electrode terminal post;205, wire;206, disc electrode;207, electrode sealing element;3, base;4, three -dimensional control device;5, air inlet;6, reference electrode;7, counter electrode;8, air outlet;9, electrode fixed arm;10, infrared crystal. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be apparently and completely described with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0015] Please refer to Figure 1The utility model provides a technical scheme: self -adjusting working electrode, including tubulose electrode stem 201 and disc electrode 206, the upper and lower both ends of electrode stem 201 are installed with upper sealing cover 202 and lower sealing cover 203 respectively, the outside of disc electrode 206 is wrapped with electrode sealing element 207, and the upper end of electrode sealing element 207 is axially inserted into lower sealing cover 203 and electrode stem 201, and the upper part of disc electrode 206 is sleeved with sealing ring b, and lower sealing cover 203 is pressed sealing ring b after being screwed with electrode stem 201. The middle part of upper sealing cover 202 is fixedly installed with the electrode terminal post 204 that penetrates axially, and the upper sleeve of electrode terminal post 204 has sealing ring a, and the lower part of upper sealing cover 202 is pressed sealing ring a. The lower end of electrode terminal post 204 is connected with the tail end of disc electrode 206 through wire 205, and disc electrode 206 has a certain swing and expansion allowance relative to electrode stem 201 with the electrode sealing element 207 wrapped in it, and the lower side of disc electrode 206 is flush with the bottom surface of electrode sealing element 207 and is exposed.

[0016] Reference Figure 2 The utility model discloses electrochemical infrared spectrum outer reflection reaction pool, including reaction pool 1 and base 3, reaction pool 1 fixed mounting is in base 3, is provided with gas inlet 5 and gas outlet 8 respectively on reaction pool 1, and is installed with three -dimensional control device 4 on base 3, and the output of three -dimensional control device 4 is fixedly installed with electrode fixed arm 9, and the front end vertical installation working electrode 2 of electrode fixed arm 9, and three -dimensional control device 4 moves the position of working electrode 2 in three -dimensional space. The lower end of working electrode 2 reaches reaction pool 1, and vertical reference electrode 6 and counter electrode 7 are installed on reaction pool 1, and infrared crystal 10 is installed on the bottom of reaction pool 1, and infrared crystal 10 is made of zinc sulfide, calcium fluoride, silicon, germanium, diamond one or several mixed, when detecting, the bottom of disc electrode 206 contacts with infrared crystal 10, and disc electrode 206 is supported by infrared crystal 10 and occurs adaptive deviation, promotes the surface of disc electrode 206 and the surface of infrared crystal 10 parallel, to ensure the thickness and parallelism of the thin electrolyte layer between both.

[0017] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. Self-regulating working electrode comprising a tubular electrode rod (201) and a disc electrode (206), characterized in that: The upper and lower ends of the electrode rod (201) are respectively provided with an upper sealing cover (202) and a lower sealing cover (203), the outer side of the disc electrode (206) is wrapped with an electrode sealing member (207), the upper end of the electrode sealing member (207) is axially inserted into the lower sealing cover (203) and the electrode rod (201), the middle part of the upper sealing cover (202) is fixedly provided with an electrode terminal post (204) which is axially penetrated, and the lower end of the electrode terminal post (204) is connected with the tail end of the disc electrode (206) through a wire (205).

2. The self-adjusting working electrode of claim 1, wherein: The upper end of the electrode terminal post (204) is sleeved with a sealing ring a, and the lower part of the upper sealing cover (202) is used for pressing the sealing ring a.

3. The self-adjusting working electrode of claim 1, wherein: The upper part of the disc electrode (206) is sleeved with a sealing ring b, and the lower sealing cover (203) is screwed with the electrode rod (201) to press the sealing ring b.

4. An electrochemical infrared spectroscopy external reflection reaction cell, comprising a reaction cell (1) and a base (3), wherein the reaction cell (1) is fixedly installed on the base (3), and the reaction cell (1) is respectively provided with a gas inlet (5) and a gas outlet (8), characterized in that: The base (3) is provided with a three-dimensional control device (4), the output end of the three-dimensional control device (4) is fixedly provided with an electrode fixing arm (9), the front end of the electrode fixing arm (9) is vertically provided with a working electrode (2), the lower end of the working electrode (2) extends to the reaction pool (1), the reaction pool (1) is provided with a vertical reference electrode (6) and a counter electrode (7), and the bottom of the reaction pool (1) is provided with an infrared crystal (10).

5. The electrochemical infrared spectroscopic external reflection reaction cell of claim 4, wherein: The infrared crystal (10) is one or a mixture of several of zinc selenide, calcium fluoride, silicon, germanium and diamond.

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