Electrochemical mass spectrometry liquid sample injection detection device and electrochemical mass spectrometry liquid sample injection detection system

Abstract

The utility model relates to an electrochemical mass spectrum liquid sample injection detection device (10), which comprises a liquid storage container (11), a liquid inlet pipe (12), a liquid outlet pipe (13) and a liquid outlet pipe (14), and is characterized in that the liquid storage container (11) is used for storing electrolyte to be subjected to electrochemical reaction; the pumping device (12) is in fluid communication with the liquid storage container (11), is positioned at the downstream of the liquid storage container (11) and is used for adjusting the pumping speed of the electrolyte; the electrode device (13) is in fluid communication with the pumping device (12) and used for carrying out electrochemical reaction, and the detection device is high in integration degree and compact in size.

Description

Technical Field

[0001] The utility model relates to an electrochemical mass spectrometry liquid detection device and an electrochemical mass spectrometry liquid sampling detection system, in particular to a detection device for metal dissolution of a fuel cell catalyst. Background Art

[0002] Fuel cells are used to directly convert chemical energy into electrical energy, among which oxygen reduction reaction is the key reaction in fuel cells. In order to promote the oxygen reduction reaction, fuel cells need to use catalysts. However, metal dissolution will occur in the catalyst during long-term operation, that is, the metal in the catalyst will dissolve into the electrolyte, resulting in a decrease in fuel cell performance. At present, there is no standardized, integrated and compact detection device, making the detection of catalyst metal dissolution in the electrolyte time-consuming and labor-intensive. Utility Model Content

[0003] In order to improve the defects of the prior art, the utility model provides an electrochemical mass spectrometry liquid sampling detection device, the detection device comprising: a liquid storage container, for storing an electrolyte used for an electrochemical reaction; a pumping device, fluidically connected to the liquid storage container and located downstream thereof, for pumping the electrolyte; and an electrode device, fluidically connected to the pumping device, for performing an electrochemical reaction, and for providing a place for performing an electrochemical reaction.

[0004] In some embodiments, the detection device includes a temperature control device for adjusting and monitoring the ambient temperature of the electrochemical reaction.

[0005] In some embodiments, the pumping device is located upstream or downstream of the electrode device along the flow direction of the electrolyte.

[0006] In some embodiments, the detection device includes a waste container, which is in fluid communication with the electrode device and is located downstream thereof, for receiving excess electrolyte from the electrode device.

[0007] In some embodiments, the temperature control device is integrally disposed on at least one of the liquid storage container and the electrode device.

[0008] In some embodiments, the temperature control device is integrally disposed on the liquid storage container to adjust and monitor the temperature of the electrolyte in the liquid storage container.

[0009] In some embodiments, the temperature control device is integrally disposed on the electrode device for adjusting and monitoring the temperature inside the electrode device.

[0010] In some embodiments, the temperature control device includes a first temperature controller and a second temperature controller, the first temperature controller is integrally provided in the liquid storage container, and the second temperature controller is integrally provided in the electrode device.

[0011] In some embodiments, the first temperature controller is integrally disposed on the bottom of the liquid storage container, and the second temperature controller is integrally disposed on the bottom of the electrode device.

[0012] In some embodiments, the first thermostat and the second thermostat each include a heating plate.

[0013] The utility model also provides an electrochemical mass spectrometry liquid sampling detection system, the detection device includes a detection mechanism and an electrochemical mass spectrometry liquid sampling detection device, the detection mechanism is fluidly connected to the electrode device and is located downstream thereof, and the detection mechanism is used to perform ICP-MS testing to detect the content of catalyst-dissolved metal in the electrolyte after the chemical reaction.

[0014] In some embodiments, the detection system also includes an electrochemical workstation, the electrode device includes a reference electrode, a counter electrode and a working electrode, the catalyst is located on the working electrode, and the reference electrode, the counter electrode and the working electrode are electrically connected to the electrochemical workstation so that an electrochemical reaction can be performed through the program of the electrochemical workstation.

[0015] The electrochemical mass spectrometry liquid sampling detection device provided by the utility model can more efficiently obtain the content of catalyst metal dissolution in the electrolyte after the electrochemical reaction of the fuel cell at different temperatures, thereby more efficiently and accurately evaluating the influence of the catalyst metal dissolution on the performance of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram showing the connection relationship of various components of an electrochemical mass spectrometry liquid sampling detection device according to an exemplary embodiment of the present utility model.

[0018] Figure numerals: 10, electrochemical mass spectrometry liquid sampling detection device; 11, liquid storage container; 12, pumping device; 13, electrode device; 14, waste liquid container; 151, first temperature controller; 152 second temperature controller; 16, detection mechanism; 17, electrochemical workstation. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1 As shown, the utility model provides an electrochemical mass spectrometry liquid sampling detection device 10, the detection device 10 includes a liquid storage container 11, a pumping device 12 and an electrode device 13; the liquid storage container 11 is configured to store an electrolyte for an electrochemical reaction, the pumping device 12 is configured to pump the electrolyte in the liquid storage container 11 to other components of the detection device 10, the pumping device 12 is fluidically connected to the liquid storage container 11 and is located downstream thereof, and is used to pump the electrolyte to each component of the detection device 10; the electrode device 13 is fluidically connected to the pumping device 12, so that the electrolyte to be chemically reacted undergoes an oxygen reduction reaction on the electrode device 13, and the catalyst is located on the working electrode of the electrode device 13. Such a detection device is highly integrated and compact. Optionally, the pumping device 12 includes a peristaltic pump.

[0021] In some embodiments, Figure 1 As shown, the detection device 10 also includes a temperature control device, which may include a heater and a temperature sensor, which are respectively used to adjust and monitor the ambient temperature of the electrochemical reaction in the detection device 10, so that the detection device 10 can be adjusted to different temperatures to carry out electrochemical reactions, thereby facilitating the evaluation of the content of catalyst metal dissolution in the electrochemical reaction at different temperatures, so that the influence of catalyst metal dissolution on fuel cell performance can be evaluated more conveniently, accurately and efficiently.

[0022] In some embodiments, Figure 1 As shown, along the flow direction of the electrolyte, the pumping device 12 is located upstream or downstream of the electrode device 13. The pumping device 12 at the upstream pushes the electrolyte in the liquid storage container 11 to other components of the detection device 10 through positive pressure. The pumping device 12 at the downstream draws the electrolyte in the liquid storage container 11 to other components of the detection device 10 through negative pressure.

[0023] In some embodiments, Figure 1 As shown, the detection device 10 further includes a waste liquid container 14 , which is in fluid communication with the electrode device 13 and is located downstream thereof, and is used to receive excess electrolyte in the detection device 10 .

[0024] In some embodiments, the temperature control device is integrally provided in at least one of the liquid storage container 11 and the electrode device 13. The temperature control device may include a heater and a temperature sensor, which are respectively used to adjust and monitor the ambient temperature of the electrochemical reaction in the detection device 10. When the temperature control device is provided on the liquid storage container 11, the heater of the temperature control device can heat the electrolyte to be chemically reacted in the liquid storage container 11 to a desired temperature at one time or in stages, and the temperature sensor of the temperature control device can monitor the temperature of the electrolyte to be chemically reacted in the liquid storage container 11. When the temperature control device is provided on the electrode device 13, the temperature control device can heat the inside of the electrode device 13 to a desired temperature and can monitor the temperature inside the electrode device 13.

[0025] In some embodiments, Figure 1 As shown, the temperature control device may include a first temperature controller 151 and a second temperature controller 152. The first temperature controller 151 is integrally arranged in the liquid storage container 11, and the second temperature controller 152 is integrally arranged in the electrode device 13. In this way, the detection device 10 can be heated and monitored in different regions. The heater of the first temperature controller 151 preheats the electrolyte in the liquid storage container 11 to a desired temperature, and the temperature sensor of the first temperature controller 151 can monitor the temperature of the electrolyte in the liquid storage container 11. The heater of the second temperature controller 152 can heat the interior of the electrode device 13 to a desired temperature, and the temperature sensor of the second temperature controller 152 can monitor the temperature inside the electrode device 13. The desired temperature here can be set according to actual needs, thereby realizing the requirement that the detection device 10 can perform electrochemical reactions at different electrochemical temperatures.

[0026] In some embodiments, Figure 1 As shown, the first thermostat 151 is integrally provided at the bottom of the liquid storage container 11, and the second thermostat 152 is integrally provided at the bottom of the electrode device 13. Optionally, the first thermostat 151 and the second thermostat 152 include a heating plate, which is built into the bottom of the liquid storage container 11 and the electrode device 13, so that the first thermostat 151 and the second thermostat 152 are more integrated and more compact.

[0027] The utility model also provides an electrochemical mass spectrometry liquid sampling detection system, such as Figure 1 As shown, the detection system includes a detection mechanism 16 and the above-mentioned electrochemical mass spectrometry liquid sampling detection device 10. The detection mechanism 16 is fluidly connected to the electrode device 13 and is located downstream thereof. The detection mechanism 16 is used to perform ICP-MS testing to detect the content of catalyst metal dissolution in the electrolyte after the chemical reaction, thereby being able to more conveniently, efficiently and accurately evaluate the impact of catalyst metal dissolution on fuel cell performance.

[0028] In some embodiments, the detection system further includes an electrochemical workstation 17, and the electrode device 13 includes a reference electrode, a counter electrode, and a working electrode to provide an electrochemical reaction site for the fuel cell oxygen reduction catalyst, and the catalyst is located on the working electrode. The reference electrode, the counter electrode, and the working electrode are electrically connected to the electrochemical workstation 17, and the electrochemical reaction is performed through the program of the electrochemical workstation 17.

[0029] Based on the electrochemical mass spectrometry liquid sampling detection device 10 of the utility model, the catalyst metal dissolution in the electrolyte after the fuel cell performs an electrochemical reaction at different temperatures can be detected more efficiently, so as to more conveniently, efficiently and accurately evaluate the influence of the catalyst metal dissolution on the performance of the fuel cell, thereby judging the influence on the service life of the catalyst, and further improving the service life of the fuel cell.

[0030] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrochemical mass spectrometry liquid sampling detection device, characterized in that: The detection device (10) comprises: A liquid storage container (11) for storing an electrolyte to be subjected to an electrochemical reaction; A pumping device (12), in fluid communication with the liquid storage container (11) and located downstream thereof, for pumping the electrolyte; An electrode device (13) is in fluid communication with the pumping device (12) and is used to provide a place for electrochemical reaction; The detection device comprises a temperature control device for adjusting and monitoring the ambient temperature of the electrochemical reaction in the detection device (10); and The temperature control device is integrally arranged on the liquid storage container (11) and is used to adjust and monitor the temperature of the electrolyte in the liquid storage container (11), or the temperature control device comprises a first temperature controller (151) and a second temperature controller (152), wherein the first temperature controller (151) is integrally arranged on the liquid storage container (11), and the second temperature controller (152) is integrally arranged on the electrode device (13).

2. The electrochemical mass spectrometry liquid sampling detection device according to claim 1, characterized in that: Along the flow direction of the electrolyte, the pumping device (12) is located upstream or downstream of the electrode device (13).

3. The electrochemical mass spectrometry liquid sampling detection device according to claim 1, characterized in that: The detection device comprises a waste liquid container (14), which is in fluid communication with the electrode device (13) and is located downstream thereof, and is used to receive excess electrolyte in the detection device.

4. The electrochemical mass spectrometry liquid sampling detection device according to claim 1, characterized in that: The first temperature controller (151) is integrally arranged at the bottom of the liquid storage container (11), and the second temperature controller (152) is integrally arranged at the bottom of the electrode device (13).

5. The electrochemical mass spectrometry liquid sampling detection device according to claim 4, characterized in that: The first thermostat (151) and the second thermostat (152) both comprise a heating plate.

6. An electrochemical mass spectrometry liquid sampling detection system, characterized in that: The invention comprises a detection mechanism (16) and an electrochemical mass spectrometry liquid sampling detection device according to any one of claims 1 to 5, wherein the detection mechanism (16) is fluidically connected to the electrode device (13) and is located downstream thereof, and the detection mechanism (16) is used to perform an ICP-MS test to measure the content of catalyst metal dissolution in the electrolyte after the chemical reaction.

7. The electrochemical mass spectrometry liquid sampling detection system according to claim 6, characterized in that: The detection system also includes an electrochemical workstation (17), the electrode device (13) includes a reference electrode, a counter electrode and a working electrode, the catalyst is located on the working electrode, and the reference electrode, the counter electrode and the working electrode are electrically connected to the electrochemical workstation (17) so as to perform an electrochemical reaction according to the program of the electrochemical workstation (17).

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