CN210243559U - Electrochemical testing device - Google Patents
Electrochemical testing device Download PDFInfo
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- CN210243559U CN210243559U CN201920813541.4U CN201920813541U CN210243559U CN 210243559 U CN210243559 U CN 210243559U CN 201920813541 U CN201920813541 U CN 201920813541U CN 210243559 U CN210243559 U CN 210243559U
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Abstract
The application discloses electrochemistry testing arrangement forms the passageway through electrolyte resistant liquid's insulating material, and the working electrode is on the passageway wall, through embedding 1 or more working electrodes, passes through the capillary and is connected to the reference electrode on the working electrode square, and the downstream of working electrode sets up the counter electrode, forms the three electrode electrochemical analysis test system of high flux based on canal flow technique. The utility model discloses testing arrangement is through constituting the testing channel, is similar to micro-fluidic chip, can reduce volume, reduce cost greatly.
Description
Technical Field
The present application relates to an electrochemical test device, particularly suitable for performance testing of hydrogen fuel cell catalysts.
Background
The hydrogen fuel cell is green, efficient and widely applicableA source conversion technique. The most important application of Fuel Cell Vehicles (FCV) is the "ultimate solution for new energy vehicles" due to its outstanding advantages of high energy density, long endurance, zero pollutant emissions, and easy hydrogenation. The theoretical value of the energy conversion efficiency can reach about 80 percent, which is far higher than that of an internal combustion engine. In addition, the hydrogen fuel cell has the advantages of zero emission, no pollution, low noise and the like, in the working process, reactants of hydrogen and oxide respectively carry out electrochemical reaction on two electrodes, and the product only contains electric energy and water, so that the CO is greatly slowed down2A significant environmental problem with isothermal chamber gas venting.
The catalyst is the most critical material in the fuel cell automobile core component electric pile. In the initial development stage of the catalyst, rigorous performance tests including half-cell halfcell are required to judge the specific activity, specific surface area and mass activity of the catalyst, and the characterization of the initial performance of the catalyst is an important step.
In the prior art, a commonly used catalyst performance test is performed by an RDE (rotating disc electrode) method, in the rotating disc electrode test, an electrode is inserted into an electrolyte and rotates, the electrolyte under the disc electrode flows outwards, meanwhile, a vortex is formed along the plane of the disc electrode, fresh electrolyte is supplied to the surface of the electrode in a direction perpendicular to the direction of the disc electrode, concentration polarization is eliminated, and therefore accurate electrochemical measurement data are obtained.
However, the RDE test has at least some of the following problems:
1. the equipment is large, and the number of devices is large;
2: the electrolyte has certain pollution along with the reaction;
3. only one electrode test can be carried out at the same time;
4. the existence of the electric brush causes certain electrochemical noise;
5. the test environment temperature is low, and the temperature of the similar fuel cell during working cannot be simulated;
6. the electrolyte is not easily replaced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrochemistry testing arrangement to overcome among the prior art technical problem such as bulky, have electrochemistry noise, the difficult change of electrolyte.
In order to achieve the above object, the utility model provides a following technical scheme:
the embodiment of the application discloses an electrochemical testing device, including:
a base body formed with a channel passage;
the liquid inlet and the liquid outlet are respectively communicated with two ends of the channel; and
a three-electrode system acting with the channeling channel.
Preferably, in the electrochemical test device as described above, the three-electrode system includes:
the working electrode and the reference electrode are respectively communicated with two sides of the channel flow channel;
and the counter electrode is arranged between the working electrode and the liquid outlet, and one end of the counter electrode extends into the channel flow channel.
Preferably, in the above electrochemical testing device, the base body is provided with a first insertion hole communicated with the channel,
the working electrode is arranged in a modularized mode and is matched in the first jack.
Preferably, in the above electrochemical testing device, the substrate is provided with a first channel and a reference electrode channel, and the capillary channel is communicated between the channel and the reference electrode channel.
Preferably, in the above electrochemical testing device, the base body is provided with a second insertion hole communicated with the channel, and the counter electrode is inserted into the second insertion hole in a matching manner.
Preferably, in the above electrochemical testing device, a second channel is connected between the liquid outlet and the channel,
the second channel and the second jack are respectively positioned at two sides of the channel,
the tip of the counter electrode extends into the second channel.
Preferably, in the above electrochemical testing device, each of the working electrodes includes a double electrode composed of two glassy carbon electrodes.
Preferably, in the above electrochemical testing device, the base includes a first substrate and a second substrate, and the channel is formed between the first substrate and the second substrate.
Preferably, in the electrochemical test apparatus described above, the flow channel extends in a horizontal direction.
Preferably, in the electrochemical testing apparatus, the substrate is made of polytetrafluoroethylene or acrylic resin.
Compared with the prior art, the utility model discloses an advantage includes at least: the utility model discloses testing arrangement is through constituting the testing channel, is similar to micro-fluidic chip, can reduce volume, reduce cost greatly.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an electrochemical testing apparatus according to an embodiment of the present invention;
fig. 2 is a top view of a second substrate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a working electrode according to an embodiment of the present invention;
fig. 4 is a top view of the first substrate according to an embodiment of the present invention.
Detailed Description
The present invention will be more fully understood from the following detailed description, which should be read in conjunction with the accompanying drawings. Detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed embodiment.
Referring to fig. 1, an electrochemical test device includes a substrate made of an insulating and corrosion-resistant material having electrolyte-resistant properties, such as teflon or acrylic.
In one embodiment, the base body includes a first substrate 10 and a second substrate 20 stacked one on top of the other, the first substrate 10 and the second substrate 20 are in surface contact, and a channel 21 is defined between the first substrate 10 and the second substrate 20, and the channel 21 extends in a horizontal plane.
The first substrate 10 and the second substrate 20 may be fastened by bolts or may be connected by gluing.
In one embodiment, the thickness of the first substrate 10 and the second substrate 20 is about 30mm, and the height of the channel 21 is about 0.5 mm.
Referring to fig. 2, the channel 21 is recessed on the top surface of the second substrate 20, and the first substrate 10 is attached to the peripheral surface of the channel 21 to form a seal.
Further, a liquid inlet 22 and a liquid outlet 23 are respectively formed at two ends of the second substrate 20, and the liquid inlet 22 and the liquid outlet 23 are respectively communicated with the channel 21.
In one embodiment, a channel 24 is connected between the liquid inlet 22 and the channel 21, wherein the liquid inlet extends in a horizontal direction, the channel 24 extends in a vertical direction, and the liquid inlet 22 is located below the channel 21.
In the technical scheme, the liquid inlet 22 is communicated with an external peristaltic pump, and flowing electrolyte can be continuously pumped in through the peristaltic pump. To facilitate connection to the outside, the inlet port 22 is provided as a threaded hole.
Among this technical scheme, the preferred passageway of flat shape of canal channel 21 forms mobile electrolyte between inlet and the liquid outlet, realizes the electrochemistry test under the stable mobile condition of electrolyte, so not only can eliminate the concentration difference, and equipment is small moreover, and electrolyte is difficult to produce the pollution, can carry out a plurality of electrode tests, no electrochemical noise, and electrolyte can be changed moreover.
In one embodiment, a channel 25 is connected between the liquid outlet 23 and the channel 21, wherein the liquid outlet 23 extends in a horizontal direction, the channel 25 extends in a vertical direction, and the liquid outlet 23 is located below the channel 21.
In this technical scheme, liquid outlet 23 is used for the outflow of liquid, and for convenience and external connection, liquid outlet 23 sets up to the screw hole.
It is easily conceivable that the channel 21 may be formed on the lower surface of the first substrate 10.
In other embodiments, the substrate may be integrally formed, and the channel may be opened in the substrate from the substrate end surface, or may be opened on the substrate surface.
The matrix is also provided with a three-electrode system for electrochemical detection. The three-electrode system includes a working electrode 30, a reference electrode (not shown), and a counter electrode 40.
Referring to fig. 3, the working electrodes 30 are modularly arranged to form a whole, and each working electrode 30 includes two electrodes made of two glassy carbon electrodes 31.
In a preferred embodiment, the long side of the glassy carbon electrode is parallel to the long side of the working electrode, the distance between the two glassy carbon electrodes is 6mm, the distance between the two sides of the glassy carbon electrode is 3mm, and the upper part of the glassy carbon electrode is led out through a lead or a Cu column.
Referring to fig. 4, the first substrate 10 is provided with at least one insertion hole 11, and each insertion hole 11 is provided with a working electrode 30.
In the technical scheme, the working electrode 30 is modularized, so that the rapid replacement can be conveniently realized.
The number of the insertion holes or the number of the working electrodes on the first substrate 10 may be set according to actual needs.
Continuing with fig. 1 and 2, second substrate 20 defines a channel 26 and a reference electrode channel 27. Wherein the channel 26 is connected between the channel 21 and the reference electrode channel 27, and the reference electrode channel 27 is used for connecting the salt bridge of the reference electrode.
In one embodiment, the opening of the reference electrode channel 27 is provided as a threaded hole to facilitate connection and sealing to the outside.
Further, the passage 26 extends in the vertical direction, and the reference electrode passage 27 extends in the horizontal direction corresponding to just below the insertion hole 11.
Referring to fig. 4, the first substrate 10 is provided with a hole 12, and a counter electrode 40 is disposed in the hole 12.
Further, the tip of the counter electrode 40 extends into the channel 25.
In a preferred embodiment, a Pt sheet is used for the counter electrode 40.
In an application example, the electrochemical testing device can be used for testing the performance of the catalyst and is suitable for the field of hydrogen fuel cells.
Example 1
The first substrate 10 is formed by a rectangular plate 150 x 70 x 30mm, and has a rectangular through opening (insertion hole) 11 near the right side of the center of the rectangular plate for placing the modular working electrode 30, and the right side of the working electrode 30 has a through opening 12 facing the center of the channel 25, and the opening 12 is a placement hole for the counter electrode 40.
The second substrate 20 is composed of a rectangular plate 150 x 70 x 30mm, the center of the top surface of the rectangular plate is provided with 120 x 20 x 0.5mm slots to form channels 21 for electrolyte to flow, and the centers of the left and right sides of the second substrate 20 are provided with 1/4-28 threaded holes 22 (liquid inlet) and 23 (liquid outlet), and the hole depth is 15 mm. Rectangular slots 24 and 25 with the depth of 2mm are respectively arranged on the left side and the right side of the slot 21, the depth of the slots is consistent with the bottommost ends of the threaded holes 22 and 23, the threaded hole 22 is an electrolyte inlet, and the threaded hole 23 is an electrolyte outlet. A 1mm capillary opening 26 opposite the working electrode is provided in the right center of the channel 21, and a threaded hole 27 1/4-28 in the second substrate 20 communicates with the capillary opening 26 and connects to the salt bridge of the reference electrode.
The working electrode 30 is mainly made of polytetrafluoroethylene or acrylic resin, which is an insulating corrosion-resistant material having electrolyte resistance.
The first substrate 10 and the second substrate 20 are screwed to each other by a series of through bolts (not shown) and nuts, and the two substrates are face-bonded.
Two glassy carbon electrodes are embedded in the bottom surface of the working electrode 30, the long edges of the glassy carbon electrodes are parallel to the long edges of the working electrode, the distance between the two glassy carbon electrodes is 6mm, the distance between the two sides of the glassy carbon electrodes is 3mm, the upper part of the glassy carbon is led out through a lead or a Cu column, and the two glassy carbon electrodes form a double electrode.
Glassy carbon electrode size was 4 x 1 x 3 mm.
And the counter electrode adopts a Pt sheet counter electrode.
To sum up, the utility model discloses an insulating material of nai electrolyte solution forms the passageway, and working electrode is on the passageway wall, through embedding 1 or a plurality of working electrode, on working electrode square through the capillary and be connected to the reference electrode, and working electrode's low reaches set up the counter electrode, form the three electrode electrochemical analysis test system of high flux based on canal flow technique. It includes at least the advantages:
1. the working electrode is modularized, so that the electrode is easy to replace and polish, and the testing efficiency is improved;
2. the electrolyte is continuously pumped in by a peristaltic pump, so that fresh electrolyte is always on the surface of the electrode, and the electrolyte can be quickly replaced by switching different solutions through the peristaltic pump;
3. because there is no RDE rotating disk brush present, the associated electrochemical noise is reduced and more minute currents can be detected;
4. and no rotating equipment is provided, so that the test system is smaller and the cost is reduced.
The aspects, embodiments, features and examples of the present invention should be considered illustrative in all respects and not intended to be limiting, the scope of the invention being defined only by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.
The use of headings and chapters in this application is not meant to limit the invention; each section may apply to any aspect, embodiment, or feature of the present invention.
Throughout this application, where a composition is described as having, containing, or comprising specific components or where a process is described as having, containing, or comprising specific process steps, it is contemplated that the compositions taught by the present invention also consist essentially of, or consist of, the recited components, and that the processes taught by the present invention also consist essentially of, or consist of, the recited process steps.
In this application, where an element or component is referred to as being included in and/or selected from a list of recited elements or components, it is understood that the element or component can be any one of the recited elements or components and can be selected from a group consisting of two or more of the recited elements or components. Moreover, it should be understood that elements and/or features of the compositions, apparatus, or methods described herein may be combined in various ways, whether explicitly described or implicitly described herein, without departing from the spirit and scope of the present teachings.
Unless specifically stated otherwise, use of the terms "comprising", "including", "having" or "having" is generally to be understood as open-ended and not limiting.
The use of the singular herein includes the plural (and vice versa) unless specifically stated otherwise. Furthermore, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In addition, where the term "about" is used before a quantity, the teachings of the present invention include the particular quantity itself unless specifically stated otherwise.
It should be understood that the order of steps or the order in which particular actions are performed is not critical, so long as the teachings of the present invention remain operable. Further, two or more steps or actions may be performed simultaneously.
It is to be understood that the figures and descriptions of the present invention have been simplified to illustrate elements that are relevant for a clear understanding of the present invention, while eliminating, for purposes of clarity, other elements. However, those skilled in the art will recognize that these and other elements may be desirable. However, because such elements are well known in the art, and because they do not facilitate a better understanding of the present invention, a discussion of such elements is not provided herein. It should be understood that the figures are presented for illustrative purposes and not as construction diagrams. The omission of details and modifications or alternative embodiments is within the scope of one skilled in the art.
It is to be understood that in certain aspects of the present invention, a single component may be replaced by multiple components and that multiple components may be replaced by a single component to provide an element or structure or to perform a given function or functions. Such substitutions are considered to be within the scope of the present invention, except where such substitution would not operate to practice a particular embodiment of the invention.
While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. Moreover, unless specifically stated any use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another.
Claims (10)
1. An electrochemical testing device, comprising:
a base body formed with a channel passage;
the liquid inlet and the liquid outlet are respectively communicated with two ends of the channel; and
a three-electrode system acting with the channeling channel.
2. The electrochemical testing apparatus of claim 1, wherein the three-electrode system comprises:
the working electrode and the reference electrode are respectively communicated with two sides of the channel flow channel;
and the counter electrode is arranged between the working electrode and the liquid outlet, and one end of the counter electrode extends into the channel flow channel.
3. The electrochemical testing device of claim 2, wherein the base defines a first receptacle communicating with the channel,
the working electrode is arranged in a modularized mode and is matched in the first jack.
4. The electrochemical testing device of claim 2, wherein the substrate defines a first channel and a reference electrode channel, the first channel communicating between the channel and the reference electrode channel.
5. The electrochemical testing device of claim 2, wherein the base defines a second receptacle communicating with the channel, and the counter electrode is cooperatively received in the second receptacle.
6. The electrochemical testing apparatus of claim 5, wherein a second channel is connected between the liquid outlet and the channeling channel,
the second channel and the second jack are respectively positioned at two sides of the channel,
the tip of the counter electrode extends into the second channel.
7. The electrochemical testing device of claim 2, wherein each of the working electrodes comprises a bipolar electrode consisting of two glassy carbon electrodes.
8. The electrochemical testing device of claim 1, wherein the base includes a first substrate and a second substrate, the channel being formed between the first substrate and the second substrate.
9. The electrochemical testing device of claim 1, wherein the channeling channel extends in a horizontal direction.
10. The electrochemical testing device of claim 1, wherein the substrate is made of teflon or acrylic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920813541.4U CN210243559U (en) | 2019-05-31 | 2019-05-31 | Electrochemical testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920813541.4U CN210243559U (en) | 2019-05-31 | 2019-05-31 | Electrochemical testing device |
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| CN210243559U true CN210243559U (en) | 2020-04-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660145A (en) * | 2022-03-23 | 2022-06-24 | 南京工业大学 | Rotary disk electrode device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660145A (en) * | 2022-03-23 | 2022-06-24 | 南京工业大学 | Rotary disk electrode device |
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Effective date of registration: 20200522 Address after: 318, building 4, No. 187, Jinshui Road, Licang District, Qingdao City, Shandong Province Patentee after: Qingdao chuangqixinneng Catalysis Technology Co., Ltd Address before: 215000 7 building, 398 D, 398 water road, Suzhou Industrial Park, Suzhou, Jiangsu Patentee before: SUZHOU TIANJI INNOVATION NANO TECHNOLOGY Co.,Ltd. |