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CN-121977960-A - Hydrogen evolution reaction electrode alternating working condition simulation device based on multiple coupling effects

CN121977960ACN 121977960 ACN121977960 ACN 121977960ACN-121977960-A

Abstract

The invention relates to the technical field of catalysts, in particular to a multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device which comprises a substrate, a flow regulating part, a deformation bearing frame and a flexible electrode plate, wherein an electrolyte flow channel is arranged in the substrate, the electrolyte flow channel is provided with at least one flow speed regulating section, the flow regulating part is assembled in the flow speed regulating section and is used for dynamically regulating the flow speed of electrolyte passing through the electrolyte flow channel, the deformation bearing frame is arranged in the flow speed regulating section, the flexible electrode plate is detachably arranged on the deformation bearing frame, and the technical problem that a traditional laboratory testing device cannot simulate a multi-physical field dynamic coupling effect of periodic alternation of flow speed physical flushing and bubble micro-jet impact modes caused by flow speed change in an industrial electrolysis working condition is solved, so that the shedding service performance evaluation of an electrode plate catalyst nano structure is realized.

Inventors

  • WU WEN
  • XUAN YAWEN
  • LI QUANLIANG
  • WANG ZHANHUI

Assignees

  • 周口师范学院

Dates

Publication Date
20260505
Application Date
20260309

Claims (10)

  1. 1. The utility model provides a hydrogen evolution reaction electrode alternating operating mode analogue means based on many coupling effect which characterized in that includes: a substrate (1), wherein an electrolyte flow channel (2) is arranged inside the substrate (1), and the electrolyte flow channel (2) is provided with at least one flow speed regulating section; A flow rate adjusting member (3), the flow rate adjusting member (3) being fitted to the flow rate adjusting section for dynamically adjusting the flow rate of the electrolyte passing through the electrolyte flow passage (2); The deformation bearing frame (4), the deformation bearing frame (4) is arranged on the flow speed regulating section, the flexible electrode plate (5) is detachably arranged on the deformation bearing frame (4), and the deformation bearing frame (4) is configured to be capable of driving the flexible electrode plate (5) to reversibly switch between a first deformation state and a second deformation state in response to an external driving force; The gas vibration coupling unit (6), the gas vibration coupling unit (6) is arranged below the flexible electrode plate (5), the gas vibration coupling unit (6) is in periodical abutting fit with the deformation bearing frame (4), the gas vibration coupling unit (6) is configured to simultaneously realize the injection of simulated bubbles to the reaction surface of the flexible electrode plate (5) and the application of periodical vibration excitation to the deformation bearing frame (4) in the same action period; The driving assembly (7) is arranged on one side, deviating from the electrolyte flow channel (2), of the substrate (1), and the driving assembly (7) is respectively connected with the deformation bearing frame (4) and the air vibration coupling unit (6) so as to control the deformation bearing frame (4) and the air vibration coupling unit (6) to cooperatively act according to a preset time sequence, and further the flexible electrode plate (5) is periodically and alternately switched between a first deformation state and a second deformation state.
  2. 2. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device according to claim 1 is characterized in that the electrolyte flow channel (2) comprises a liquid inlet flow channel (21) and a liquid outlet flow channel (22); The flow speed regulation section comprises a main flow channel (23) and a reverse flow channel (24) which are arranged in parallel, wherein the input ends of the main flow channel (23) and the reverse flow channel (24) are communicated with the liquid inlet channel (21), the output end of the main flow channel (23) is communicated with the liquid outlet channel (22), and the output direction of the reverse flow channel (24) is configured to form a counter-flow with the liquid flow direction in the main flow channel (23); the flow regulating piece (3) is pivotally assembled between the main flow channel (23) and the reverse flow channel (24) and is used for controlling the opening and closing or opening of the reverse flow channel (24).
  3. 3. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device is characterized in that a protective shell (11) is arranged on the back of the substrate (1), and the driving assembly (7) is arranged in the protective shell (11); the driving assembly (7) comprises a motor (71) and a pneumatic piece (72), the motor (71) is fixedly arranged on the protective shell (11), and the pneumatic piece (72) is fixedly arranged on the back of the base plate (1); The pneumatic element (72) comprises a pneumatic shell (721), a fixed baffle (722) fixedly arranged in the pneumatic shell (721) and a sliding baffle (723) rotatably arranged in the pneumatic shell (721), wherein the fixed baffle (722) and the sliding baffle (723) divide the pneumatic shell (721) into a first chamber (724) and a second chamber (725); the output shaft of the motor (71) is connected with a driving shaft (726), the driving shaft (726) penetrates through the pneumatic shell (721) and the middle part of the base plate (1) and is connected with the flow regulating piece (3), and the driving shaft (726) is connected with the sliding partition plate (723).
  4. 4. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device according to claim 3, wherein a first pipeline (727), a first air inlet pipe (728) and a first air outlet pipe (729) are connected to the pneumatic shell (721), the first pipeline (727) is communicated with the first chamber (724), and the first air inlet pipe (728) and the first air outlet pipe (729) are communicated with the second chamber (725); the first air inlet pipe (728) is provided with a first one-way valve, and the first air outlet pipe (729) is provided with a second one-way valve.
  5. 5. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device according to claim 4, wherein the deformation bearing frame (4) comprises a fixed frame (41) and at least two movable bearing parts, the movable bearing parts are arranged in parallel at intervals, a clamping area for installing a flexible electrode plate (5) is formed between the end parts of the adjacent movable bearing parts, and the flexible electrode plate (5) is detachably installed between at least one group of adjacent movable bearing parts; A linkage transmission mechanism (42), the linkage transmission mechanism (42) being connected between the fixed frame (41) and each of the movable bearing parts, and the linkage transmission mechanism (42) being configured to convert a driving force into relative displacement of each of the movable bearing parts in the lateral and longitudinal directions, thereby changing a pitch between adjacent movable bearing parts; And at least one actuating element (43), wherein the actuating element (43) is connected with the linkage transmission mechanism (42) and is used for driving the linkage transmission mechanism (42) to act.
  6. 6. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device according to claim 4, wherein the bearing parts are a first mounting plate (44), a second mounting plate (45) and a third mounting plate (46) respectively, and the fixed frame (41) is arranged in parallel with the first mounting plate (44), the second mounting plate (45) and the third mounting plate (46); The linkage transmission mechanism (42) comprises a first connecting rod (421), a second connecting rod (422), a third connecting rod (423) and a fourth connecting rod (424), wherein two ends of the first connecting rod (421) are respectively hinged with the first mounting plate (44) and the fixed frame (41), the middle position of the second connecting rod (422) is hinged with the first mounting plate (44), two ends of the second connecting rod (422) are respectively hinged with the first mounting plate (44) and the fixed frame (41), the middle position of the third connecting rod (423) is hinged with the second mounting plate (45), two ends of the third connecting rod (423) are respectively hinged with the third mounting plate (46) and the first mounting plate (44), and two ends of the fourth connecting rod (424) are hinged with the third mounting plate (46) and the second mounting plate (45); The actuating piece (43) comprises an actuating cylinder (431), the actuating cylinder (431) is hinged to the fixed frame (41), an actuating chamber (432) is formed in the actuating cylinder (431), an actuating ring (433) is connected in a sealing sliding manner in the actuating chamber (432), an actuating rod (434) is connected to the actuating ring (433), the free end of the actuating rod (434) is hinged to the first mounting plate (44), a second pipeline (435) communicated with the actuating chamber (432) is connected to the actuating cylinder (431), and the second pipeline (435) is communicated with the first pipeline (727); The flexible electrode plate (5) is detachably mounted between the first mounting plate (44) and the second mounting plate (45) and/or between the second mounting plate (45) and the third mounting plate (46).
  7. 7. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device according to claim 6, wherein the gas vibration coupling unit (6) comprises an airtight box (61) and a frame body (62) fixedly arranged in the airtight box (61), the frame body (62) is upwards rotated to be provided with a rotating shaft (63), and a plurality of gas vibration pieces (64) are arranged on the rotating shaft (63); the air vibration piece (64) comprises a cam disc (641) and a push rod (642), the rotating shaft (63) is connected with the cam disc (641), the bottom of the push rod (642) is enclosed to form a frame structure, the cam disc (641) is located in the frame structure, and the top of the push rod (642) extends out of the airtight box (61) and can move up and down along the height direction of the airtight box (61).
  8. 8. The electrode-based multidirectional alternating stress loading test structure according to claim 7, wherein an air inlet micropore (643) is formed in the portion, located in the airtight box (61), of the ejector rod (642), and an air outlet micropore (644) is formed in the top of the ejector rod (642); when the rotating shaft (63) rotates, the corresponding ejector rods (642) are driven by different phases of the cam plates (641) to sequentially ascend and descend according to a preset time sequence, so that wave-shaped reciprocating motion is formed; The gas in the airtight box (61) escapes from the gas outlet micropore (644) through the inner cavity of the ejector rod (642) to generate simulated bubbles on the reaction surface of the flexible electrode plate (5), and meanwhile, the ejector rod (642) rising to the highest point is abutted against the deformation bearing frame (4) to transmit vibration excitation to the deformation bearing frame (4).
  9. 9. The electrode-based multidirectional alternating stress loading test structure is characterized in that a driven bevel gear (651) is coaxially connected to the rotating shaft (63), a rotating rod (65) is rotatably arranged on the base plate (1), a driving bevel gear is coaxially and fixedly arranged on the rotating rod (65), and the driving bevel gear is meshed with the driven bevel gear (651); The rotary rod (65) is coaxially and fixedly provided with a driven belt pulley (66), the driving shaft (726) is coaxially and fixedly provided with a driving belt pulley, and a belt (67) is tensioned between the driving belt pulley and the driven belt pulley (66).
  10. 10. The multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device according to any one of claims 6 to 9 is characterized by further comprising a power supply, wherein conductive gaskets are embedded in the second mounting plate (45) and the third mounting plate (46), and the two conductive gaskets are connected with the positive electrode and the negative electrode of the power supply.

Description

Hydrogen evolution reaction electrode alternating working condition simulation device based on multiple coupling effects Technical Field The invention relates to the technical field of catalysts, in particular to a hydrogen evolution reaction electrode alternating working condition simulation device based on a multi-coupling effect. Background In the prior art, laboratory performance assessment for hydrogen evolution reaction electrocatalysts relies mainly on static or simple stirred three-electrode test systems, typically over-potential tests at low electric field densities and long-term constant electric field stability tests in potassium hydroxide solutions at normal pressure. However, the conventional evaluation paradigm is significantly different from the actual working conditions of industrial alkaline water baths, so that high-performance materials screened in a laboratory often fail prematurely due to mechanical structural failure in practical applications. Specifically, the electrode needs to run under extremely high electric field density in industrial application, a large amount of hydrogen bubbles severely separated out from the surface of the electrode can generate strong physical scouring and micro-jet impact effects on the catalyst coating in the process of quick separation, meanwhile, the quick circulation flow of electrolyte in an industrial electrolysis system can apply continuous shearing stress on the surface of the electrode and also can generate traction effect on the electrode plate, so that the electrode plate generates bending strain and tensile fatigue, the mechanical factors are mutually overlapped, and the nano structure of the catalyst on the electrode plate is extremely easy to peel. More complex, the dynamic coupling and mutual restriction relation exists between the mechanical factors, so that the electrode faces an alternate damage environment under the actual working condition, in one case, when the flow rate of the electrolyte is increased, the physical scouring action of the electrolyte fluid on the electrode plate is enhanced, the drag force of the liquid flowing at high speed on the electrode plate is increased, the stretching fatigue degree of the electrode plate is increased, the flow rate is increased, the flow of bubbles is accelerated, the coverage rate of the bubbles acting on the surface of the electrode is reduced, the micro-jet impact effect generated when the bubbles collapse is reduced, in the other case, when the flow rate of the electrolyte is reduced, the physical scouring action is reduced, the drag force on the electrode plate is reduced, the electrode plate is converted from a stretching state to a compression state, the residence time of the bubbles acting on the surface of the electrode is prolonged, the coverage rate is increased, and the micro-jet impact effect generated when the bubbles collapse is obviously enhanced. In actual industrial operation, the electrodes tend to alternately experience the above two conditions, namely, continuously switching between high flow rates, strong stretching, weak bubble impact and low flow rates, weak stretching, strong bubble impact, due to fluctuations in the electrolyte circulation system, load adjustment, or start-stop operation. The periodically alternating damage environment makes the failure mechanism of the catalyst coating on the electrode plate more complex, and the catalyst coating can bear continuous scour and abrasion and tensile fatigue at high flow rate and impact fatigue due to collapse of dense bubbles at low flow rate, and the two damage mechanisms alternately act and promote each other, so that the catalyst nano structure is often peeled off in an accelerating way. However, the conventional laboratory test means can only apply constant electrochemical polarization or constant fluid conditions, cannot synchronously simulate dynamic coupling effects of multiple physical fields such as flow shearing, bubble cavitation impact, bending strain and the like, cannot realize periodic conversion between different working conditions, causes serious deviation in evaluation of the actual service performance of the catalyst, and is difficult to predict the service life of the material under actual industrial dynamic working conditions. Therefore, the inventor has identified the present invention provides a hydrogen evolution reaction electrode alternating condition simulation device based on multiple coupling effects to solve the above-mentioned technical problems Disclosure of Invention The invention aims to provide a multi-coupling effect-based hydrogen evolution reaction electrode alternating working condition simulation device, which aims to solve the technical problem that a traditional laboratory test device cannot simulate the multi-physical field dynamic coupling effect of periodic alternating of flow speed physical flushing and bubble microjet impact modes caused by flow speed change in industrial e