Ultrasonic dispersion device for preparing carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for fuel cell

Abstract

The utility model belongs to the technical field of catalyst preparation, and particularly relates to an ultrasonic dispersion device for preparing a carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for a fuel cell, which comprises a dispersion tank, the lower part of the dispersion tank is fixedly connected with four support legs which are arranged in an annular array, the inner wall of the dispersion tank is fixedly connected with a blanking pipe, and the blanking pipe is fixedly connected with the lower part of the dispersion tank. A dynamic ultrasonic dispersion mechanism is arranged at the upper part of the dispersion tank and comprises a fixed frame. Through the arrangement of the inserting rod, the first spring and other structures, the ultrasonic oscillation probe can be rapidly installed and used, a catalyst can be dispersed and prepared under the action of mechanical oscillation waves of the ultrasonic oscillation probe, and the screw can be driven to rotate under the action of the first motor, the second bevel gear, the first bevel gear and other structures; therefore, the ultrasonic oscillation probe is driven to move, and the dynamic oscillation effect of the ultrasonic oscillation probe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst preparation, in particular to an ultrasonic dispersion device for preparing a carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for a fuel cell. Background Art

[0002] At present, the main energy source of human society is still fossil fuels. However, as the demand for energy continues to grow, the reserves of this non-renewable energy source continue to decrease. At the same time, the large-scale use of fossil fuels has also led to serious environmental pollution problems. Therefore, actively looking for and developing clean renewable energy that can replace traditional fossil fuels and corresponding energy conversion devices are of great significance to solving the fossil fuel crisis and environmental pollution problems.

[0003] As a new energy conversion technology, fuel cells have many advantages, including high efficiency, environmental protection, low noise, wide fuel range, load adjustment and easy operation. Direct methanol fuel cells (DMFC) have the advantages of high energy density (4.8kWh / L) and convenient fuel transportation and storage;

[0004] However, in practical applications, single Pt catalysts have the problem of slow catalytic methanol oxidation reaction (MOR), poor stability, and easy CO poisoning during the MOR process. In the past few decades, in order to solve the above problems, researchers have done a lot of research on Pt-based catalysts, combining Pt with transition metals (such as Ru, Pd, Au and Ni, etc.) to form multi-component catalysts;

[0005] Its MOR activity and stability can be improved through component regulation and electronic effects; ordered mesoporous carbon can be used as a carrier to increase the specific surface area of ​​Pt and thus improve the catalytic activity; it can also be combined with anti-toxic elements (such as Pb, Bi, etc.) to remove CO intermediates adsorbed on the Pt catalyst through a bifunctional mechanism and ligand effect, thereby improving the activity and stability of electrocatalytic methanol oxidation.

[0006] In the utility model patent with patent authorization announcement number CN214319995U, a membrane electrode catalyst dispersion device for a fuel cell is disclosed, including a body, a water tank, a stirring device and an ultrasonic dispersion device; the water tank, the stirring device and the ultrasonic dispersion device are all installed on the body; the stirring device is located above the water tank and is used to stir the slurry in the water tank; a socket is provided on the bottom wall of the water tank; the ultrasonic dispersion device is located below the water tank and is inserted into the water tank through the socket to disperse the slurry in the water tank.

[0007] However, the existing ultrasonic dispersion devices for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalysts for fuel cells also have certain shortcomings. The existing ultrasonic dispersion devices for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalysts for fuel cells mostly use a fixed-orientation installation form to fix the ultrasonic oscillation probe, which will make the ultrasonic oscillation efficiency of the ultrasonic oscillation probe weak, and thus cause the problem of poor ultrasonic oscillation dispersion effect on the catalyst. Utility Model Content

[0008] The purpose of the utility model is to provide an ultrasonic dispersion device for preparing a carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for a fuel cell, which solves the problem that the existing ultrasonic dispersion devices for preparing a carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for a fuel cell mostly adopt a fixed-orientation installation form to fix the ultrasonic oscillation probe, which will make the ultrasonic oscillation efficiency of the ultrasonic oscillation probe weak, thereby causing poor ultrasonic oscillation dispersion effect on the catalyst.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ultrasonic dispersion device for preparing a carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for a fuel cell, comprising a dispersion tank, the lower part of which is fixedly connected to four support legs arranged in a ring array, the inner wall of which is fixedly connected to a feed pipe, the upper part of which is provided with a dynamic ultrasonic dispersion mechanism, the dynamic ultrasonic dispersion mechanism comprising a fixed frame, the upper end of which is fixedly connected to the fixed frame, and the vertical part of which is equipped with a screw through a bearing;

[0010] A bevel gear 1 is fixedly sleeved on the outer side of the screw, a motor 1 is fixedly installed on the back side of the dispersion tank and under the bevel gear 1, a moving block is threadedly connected to the outer side of the screw, an ultrasonic oscillation probe is slidably connected to the inner wall of the moving block, an insertion rod is slidably connected to the inner wall of the moving block, the insertion rod is slidably connected to the end of the ultrasonic oscillation probe, and a spring 1 is arranged on the outer side of the insertion rod.

[0011] Preferably, a bevel gear 2 is fixedly sleeved on the outer side of the output shaft of the motor 1, and the bevel gear 2 is meshed with the bevel gear 1. Through the meshing connection, when the bevel gear 2 rotates, it can drive the bevel gear 1 to rotate, thereby driving the screw to rotate.

[0012] Preferably, one end of the spring one is welded to the end plate of the insertion rod, and the other end of the spring one is welded to the moving block. Through the provision of the spring one, the insertion rod can be connected for use.

[0013] Preferably, an auxiliary cooling mechanism is provided on the right side of the dispersion tank, and the auxiliary cooling mechanism includes a water tank. The right side of the dispersion tank is fixedly connected to the water tank, and a semiconductor refrigerator is fixedly installed on the inner wall of the water tank. A circulation pipe is fixedly connected to the inner wall of the dispersion tank, and the circulation pipe is fixedly connected to the water tank. A pump body is fixedly installed on the outer side of the upper horizontal part of the circulation pipe. Through the arrangement of the semiconductor refrigerator and the water tank, the water body can be cooled, and under the action of the pump body, the circulation pipe, etc., the catalyst solution can be circulated and transported, and the catalyst generated heat by ultrasonic oscillation can be cooled.

[0014] Preferably, the upper end of the water tank is fixedly connected to a support frame, and a motor 2 is fixedly installed on the front side of the support frame, the output end of the motor 2 is rotatably connected to the support frame, and a winding roller is fixedly sleeved on the outer side of the output end of the motor 2, and the winding roller is rotatably connected to the support frame, and a traction rope is provided on the surface of the winding roller, and the traction rope is slidably connected to the water tank, and the lower end of the traction rope is fixedly connected to a movable disk, and the movable disk is slidably connected to a circulation pipe, and two symmetrically distributed springs 2 are welded to the lower end of the movable disk, and the other end of each of the springs 2 is welded to the inner bottom of the water tank, and through the arrangement of the motor 2, the traction rope, the spring 2 and other structures, the movable disk can be moved back and forth, and then the water body is agitated to improve the heat exchange efficiency between the water body and the circulation pipe.

[0015] Preferably, two symmetrically distributed reinforcing ribs are welded to the lower end of the water tank, and the short right-angle sides of each of the reinforcing ribs are welded to the dispersion tank. By setting the reinforcing ribs, the water tank can be reinforced and supported.

[0016] Preferably, the cooling end of the semiconductor refrigerator is located inside the water tank, and the heat dissipation end of the semiconductor refrigerator is located outside the water tank. Through the arrangement of the semiconductor refrigerator, the water inside the water tank can be cooled.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The utility model can quickly install and use the ultrasonic oscillation probe by setting up the structures such as the plug rod and the spring. Under the action of the mechanical oscillation wave of the ultrasonic oscillation probe, the catalyst can be dispersed and prepared. Under the action of the motor one, the bevel gear two, the bevel gear one and other structures, the screw can be driven to rotate to drive the moving block to move, and then drive the ultrasonic oscillation probe to move, so as to improve the dynamic oscillation effect of the ultrasonic oscillation probe.

[0019] 2. The utility model can circulate and transport the catalyst solution through the arrangement of the pump body, the circulation pipe and other structures. Under the action of the semiconductor refrigerator, the water body inside the water storage tank and the like, the catalyst that generates heat by oscillation can be cooled and cooled to avoid the problem of weakened ultrasonic energy output caused by reduced viscosity due to overheating of the catalyst. In addition, under the structure of the motor 2, the traction rope, the spring 2 and the like, the water body can be agitated to improve the heat exchange efficiency of the circulation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0021] Figure 2 For the utility model Figure 1 Side view of

[0022] Figure 3 For the utility model Figure 1 A top view of

[0023] Figure 4 For the utility model Figure 1 A front cross-sectional view of

[0024] Figure 5 For the utility model Figure 1 Bottom view of the dynamic ultrasonic dispersion mechanism.

[0025] In the figure: 1. dispersion tank; 2. support leg; 3. feed pipe; 4. dynamic ultrasonic dispersion mechanism; 5. auxiliary cooling mechanism; 41. fixed frame; 42. screw; 43. bevel gear one; 44. motor one; 45. bevel gear two; 46. moving block; 47. ultrasonic oscillation probe; 48. plug rod; 49. spring one; 51. water storage tank; 52. semiconductor refrigerator; 53. circulation pipe; 54. pump body; 55. support frame; 56. motor two; 57. winding roller; 58. traction rope; 59. moving disk; 590. spring two. DETAILED DESCRIPTION

[0026] 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. 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.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5, an ultrasonic dispersion device for preparing a carrier-free PtPdPb alloy two-dimensional nanosheet catalyst for a fuel cell, comprising a dispersion tank 1, the lower part of which is fixedly connected to four support legs 2 arranged in a ring array, the inner wall of the dispersion tank 1 is fixedly connected to a feed pipe 3, the upper part of the dispersion tank 1 is provided with a dynamic ultrasonic dispersion mechanism 4, the dynamic ultrasonic dispersion mechanism 4 comprises a fixing frame 41, the upper end of the dispersion tank 1 is fixedly connected to the fixing frame 41, and the vertical part of the fixing frame 41 is equipped with a screw 42 through a bearing;

[0028] A bevel gear 43 is fixedly sleeved on the outer side of the screw 42, and a motor 44 is fixedly installed on the back side of the dispersion tank 1 and located at the lower side of the bevel gear 43. A bevel gear 2 45 is fixedly sleeved on the outer side of the output shaft of the motor 44. The bevel gear 2 45 is meshed with the bevel gear 43. Through the meshing connection, when the bevel gear 2 45 rotates, the bevel gear 43 can be driven to rotate, so as to drive the screw 42 to rotate. A moving block 46 is threadedly connected to the outer side of the screw 42, and an ultrasonic oscillation probe 47 is slidably connected to the inner side wall of the moving block 46. A plug 48 is slidably connected to the inner wall of the moving block 46. The plug 48 is slidably connected to the end of the ultrasonic oscillation probe 47. A spring 49 is arranged on the outer side of the plug 48, one end of the spring 49 is welded to the end plate of the plug 48, and the other end of the spring 49 is welded to the moving block 46. Through the arrangement of the spring 49, the plug 48 can be connected and used.

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 An auxiliary cooling mechanism 5 is arranged on the right side of the dispersion tank 1, and the auxiliary cooling mechanism 5 includes a water tank 51. The water tank 51 is fixedly connected to the right side of the dispersion tank 1, and a semiconductor refrigerator 52 is fixedly installed on the inner wall of the water tank 51. A circulation pipe 53 is fixedly connected to the inner wall of the dispersion tank 1, and the circulation pipe 53 is fixedly connected to the water tank 51. A pump body 54 is fixedly installed on the outer side of the upper horizontal part of the circulation pipe 53. Through the arrangement of the semiconductor refrigerator 52 and the water tank 51, the water body can be cooled, and under the action of the pump body 54, the circulation pipe 53, etc., the catalyst solution can be circulated and transported, and the catalyst generated by ultrasonic oscillation can be cooled.

[0030] See also Figure 1 , Figure 2 , Figure 3 , Figure 4A support frame 55 is fixedly connected to the upper end of the water tank 51, and a motor 2 56 is fixedly installed on the front of the support frame 55. The output end of the motor 2 56 is rotatably connected to the support frame 55, and a winding roller 57 is fixedly sleeved on the outer side of the output end of the motor 2 56. The winding roller 57 is rotatably connected to the support frame 55. A traction rope 58 is provided on the surface of the winding roller 57, and the traction rope 58 is slidably connected to the water tank 51. The lower end of the traction rope 58 is fixedly connected to a moving disk 59, and the moving disk 59 is slidably connected to the circulation pipe 53. Two symmetrically distributed springs 2 590 are welded to the lower end of the moving disk 59, and the other end of each spring 2 590 is welded to the inner bottom of the water tank 51. Through the arrangement of the motor 2 56, the traction rope 58, the spring 2 590 and other structures, the moving disk 59 can be moved back and forth, and then the water body is agitated to improve the heat exchange efficiency between the water body and the circulation pipe 53.

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 Two symmetrically distributed reinforcing ribs are welded to the lower end of the water tank 51, and the short right-angle sides of each reinforcing rib are welded to the dispersion tank 1. Through the setting of the reinforcing ribs, the water tank 51 can be reinforced and supported. The cooling end of the semiconductor refrigerator 52 is located inside the water tank 51, and the heat dissipation end of the semiconductor refrigerator 52 is located outside the water tank 51. Through the setting of the semiconductor refrigerator 52, the water inside the water tank 51 can be cooled.

[0032] The specific implementation process of the utility model is as follows: when in use, the insertion rod 48 is pulled to move to the left side, so that the spring 1 49 is deformed, and then the ultrasonic oscillation probe 47 is pushed to slide into the inner wall of the moving block 46, and the insertion rod 48 is loosened to make the spring 1 49 recover its deformation, so as to pull the insertion rod 48 through the end of the ultrasonic oscillation probe 47, and the ultrasonic oscillation probe 47 is plugged in, so that the ultrasonic oscillation probe 47 is stable, which is convenient for the operator to quickly install and use;

[0033] By setting the ultrasonic oscillation probe 47, the catalyst solution inside the dispersion tank 1 can be subjected to ultrasonic mechanical wave oscillation treatment, and the catalyst solution can be dispersed. The motor 1 44 is started to drive the output shaft to rotate, so as to drive the bevel gear 2 45 to rotate. Under the meshing relationship, the bevel gear 2 45 drives the bevel gear 1 43 to rotate, so as to drive the screw 42 to rotate. Under the threaded connection relationship, the moving block 46 is driven to slide along the inner wall of the horizontal part of the fixed frame 41, thereby driving the ultrasonic oscillation probe 47 to move, so that the ultrasonic oscillation probe 47 is in a dynamic ultrasonic oscillation state, thereby improving the dispersion preparation efficiency of the catalyst solution.

[0034] By setting up the semiconductor refrigerator 52, the water inside the water storage tank 51 can be cooled. Under the action of the pump body 54 and the circulation pipe 53, the catalyst solution generated by ultrasonic oscillation can be circulated and sucked. Under the cooling effect of the water body, the catalyst solution can be cooled for use, thereby avoiding the problem of weakened ultrasonic energy output caused by reduced viscosity due to overheating of the catalyst.

[0035] Start motor 2 56 to drive the output end to rotate in the forward direction to drive the winding roller 57 to rotate, and wind up the traction rope 58 to pull the movable disk 59 upward, and the spring 2 590 is deformed. Then control motor 2 56 to drive the output end to rotate in the reverse direction to pay out the traction rope 58, and the spring 2 590 recovers its deformation to pull the movable disk 59 downward. Repeat this cycle. As the movable disk 59 moves back and forth, the water inside the water tank 51 can be agitated to improve the heat exchange efficiency between the water and the circulation pipe 53, thereby improving the cooling effect.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells, comprising a dispersion tank (1), characterized in that: The lower part of the dispersion tank (1) is fixedly connected to four support legs (2) arranged in a ring array, the inner wall of the dispersion tank (1) is fixedly connected to a feed pipe (3), the upper part of the dispersion tank (1) is provided with a dynamic ultrasonic dispersion mechanism (4), the dynamic ultrasonic dispersion mechanism (4) comprises a fixed frame (41), the upper end of the dispersion tank (1) is fixedly connected to the fixed frame (41), and the vertical part of the fixed frame (41) is equipped with a screw (42) via a bearing; A bevel gear (43) is fixedly sleeved on the outer side of the screw rod (42); a motor (44) is fixedly installed on the back side of the dispersion tank (1) and located below the bevel gear (43); a moving block (46) is threadedly connected to the outer side of the screw rod (42); an ultrasonic oscillation probe (47) is slidably connected to the inner wall of the moving block (46); an insertion rod (48) is slidably connected to the inner wall of the moving block (46); the insertion rod (48) is slidably connected to the end of the ultrasonic oscillation probe (47); and a spring (49) is arranged on the outer side of the insertion rod (48).

2. The ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells according to claim 1, characterized in that: A second bevel gear (45) is fixedly sleeved on the outer side of the output shaft of the motor 1 (44), and the second bevel gear (45) is meshed with the first bevel gear (43).

3. The ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells according to claim 1, characterized in that: One end of the spring one (49) is welded to the end plate of the insertion rod (48), and the other end of the spring one (49) is welded to the moving block (46).

4. The ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells according to claim 1, characterized in that: An auxiliary cooling mechanism (5) is provided on the right side of the dispersion tank (1), the auxiliary cooling mechanism (5) comprising a water storage tank (51), the right side of the dispersion tank (1) is fixedly connected to the water storage tank (51), a semiconductor refrigerator (52) is fixedly mounted on the inner wall of the water storage tank (51), a circulation pipe (53) is fixedly connected to the inner wall of the dispersion tank (1), the circulation pipe (53) is fixedly connected to the water storage tank (51), and a pump body (54) is fixedly mounted on the outer side of the upper horizontal portion of the circulation pipe (53).

5. The ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells according to claim 4, characterized in that: The upper end of the water tank (51) is fixedly connected to a support frame (55), and a second motor (56) is fixedly installed on the front of the support frame (55). The output end of the second motor (56) is rotatably connected to the support frame (55). A winding roller (57) is fixedly sleeved on the outer side of the output end of the second motor (56), and the winding roller (57) is rotatably connected to the support frame (55). A traction rope (58) is provided on the surface of the winding roller (57), and the traction rope (58) is slidably connected to the water tank (51). The lower end of the traction rope (58) is fixedly connected to a moving disk (59), and the moving disk (59) is slidably connected to the circulation pipe (53). Two symmetrically distributed second springs (590) are welded to the lower end of the moving disk (59), and the other end of each of the second springs (590) is welded to the inner bottom of the water tank (51).

6. The ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells according to claim 4, characterized in that: Two symmetrically distributed reinforcing ribs are welded to the lower end of the water storage tank (51), and the short right-angle side of each reinforcing rib is welded to the dispersion tank (1).

7. The ultrasonic dispersion device for preparing unsupported PtPdPb alloy two-dimensional nanosheet catalyst for fuel cells according to claim 4, characterized in that: The cooling end of the semiconductor refrigerator (52) is located inside the water storage tank (51), and the heat dissipation end of the semiconductor refrigerator (52) is located outside the water storage tank (51).

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