3 results about "Carbon corrosion" patented technology

This invention discloses a Pt / O-NCP catalyst and its preparation method. It utilizes self-developed nanoporous carbon (NCP) as a support, which is modified to change the internal pores from a hydrophobic to a hydrophilic state. A special preparation method is then used to obtain the noble metal catalyst Pt / O-NCP. During catalyst loading, most Pt nanoparticles are located within the mesopores of the support, maximizing the direct contact between the polymer and Pt (sulfonic acid poisoning). This solves the problems in existing catalysts where Pt nanoparticles are prone to dissolution and carbon corrosion under voltage fluctuations, leading to Pt growth and aggregation, thus avoiding the reduction in catalytic performance caused by a decrease in the active surface area of ​​the catalyst. Furthermore, this catalyst can also address the significant decrease in overpotential of ordinary carbon support materials under low humidity, resolving the typical performance degradation of PEMFCs under low humidity conditions.

This utility model discloses a high-sealing, carbon dioxide corrosion-resistant, heat-insulating oil casing, specifically relating to the field of heat-insulating oil casing technology. It includes a pipe body and a coupling. The coupling is threadedly connected to the outer end of the pipe body. A fixing plate is fixedly installed on one side of the outer surface of the pipe body. The fixing plate has multiple fixing holes inside, and two springs are fixedly installed on the inner top surface of each fixing hole. In practical operation, the end of the pipe body is inserted into the coupling and rotated to achieve a threaded connection. Under the elastic action of the springs, a limiting hook extends to the side outside the fixing hole and inserts into the limiting hole of the connecting plate, thus engaging with the threaded connection to assemble and connect the pipe body and the coupling. The elastic force of the springs provides continuous clamping force, effectively offsetting the preload attenuation caused by vibration. The insertion and engagement of the limiting hook and the limiting hole further restricts axial displacement, effectively preventing loosening between the pipe body and the coupling from affecting the transport of heavy oil.

The application provides a control method for eliminating high potential of fuel cell start-stop, comprising: obtaining the stack operation state of a fuel cell system, obtaining the cathode potential data of the stack under the start condition and the shutdown condition based on the operation state; judging whether the fuel cell system is in a high potential state according to the cathode potential data, and triggering a recovery module to perform a high potential elimination operation if the fuel cell system is in the high potential state. The stack is monitored in real time, and the working condition of the fuel cell is dynamically adjusted, so that the purpose of reducing the cathode high potential condition is achieved, and the fuel cell stack can work efficiently for a long time. The occurrence of the cathode high potential is reduced by controlling the adjustable load element, and the carbon corrosion problem is further inhibited; the occurrence of the high potential is reduced, so that the attenuation of the fuel cell performance caused by the carbon corrosion under the high potential condition is reduced, and the service life of the fuel cell is prolonged.