Ultrasonic Coating Machine for Catalyst Layer Preparation

Ultrasonic coating machine for catalyst layer preparation – uniformly spraying precious metal catalysts such as platinum and iridium on the surface of Nafion membrane

The ultrasonic coating machine has demonstrated strong technical adaptability and application advantages in the preparation of catalyst layers in the field of hydrogen production through electrolysis of water. Especially in the coating operation of noble metal catalysts on Nafion membrane surfaces, it can achieve efficient and accurate coating construction through its core technical characteristics. This device relies on high-frequency ultrasonic vibration technology (usually with a vibration frequency in the range of 20-100kHz) to efficiently atomize catalyst solutions or slurries containing precious metals such as platinum and iridium, forming uniformly sized micrometer sized droplets (with droplet sizes mostly controlled in the range of 0.5-40 micrometers). At the same time, with the unique cavitation effect of ultrasonic waves, it effectively breaks the agglomeration phenomenon of catalyst particles in the slurry, ensuring that precious metal particles such as platinum and iridium participate in the coating process in a dispersed and uniform state.

In the coating operation of Nafion membrane, the ultrasonic coating machine can accurately control the coating path and thickness through the integrated XYZ three-axis servo motion system and laser positioning technology, so that the precious metal catalyst can form a uniformly thick and dense catalytic active layer on the surface of Nafion membrane – the coating thickness can be adjusted from nanometer level to tens of microns according to actual needs, and the thickness error is strictly controlled within 5%, avoiding the problem of insufficient local catalytic activity caused by uneven coating in traditional coating methods. This uniform catalyst layer construction can fully expose the active sites of precious metals such as platinum and iridium, providing sufficient and efficient reaction sites for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in the electrolysis process.

From the perspective of reaction mechanism, in the process of electrolyzing water to produce hydrogen, the overpotential of hydrogen evolution reaction and oxygen evolution reaction directly affects the electrolysis efficiency – the higher the overpotential, the more energy is required to overcome the reaction barrier, leading to an increase in electrolysis energy consumption and a decrease in efficiency. Traditional coating methods often result in high overpotentials of HER and OER due to uneven catalyst dispersion and insufficient exposure of active sites; The catalyst layer prepared by ultrasonic coating mechanism, with the uniform distribution and sufficient exposure of platinum and iridium particles, can significantly reduce the overpotential of these two types of reactions: on the one hand, the uniform catalyst distribution reduces the path obstruction of electron transfer during the reaction process, accelerating the charge transfer rate; On the other hand, sufficient active sites make the reaction easier to initiate at lower potentials, effectively reducing energy loss.

Practical application data shows that after using an ultrasonic coating machine to prepare a precious metal catalyst layer on the surface of Nafion membrane, the electrolysis efficiency of the water electrolysis hydrogen production system can be significantly improved by 15% -20%. This efficiency improvement not only means an increase in hydrogen production per unit time, but also reduces the energy consumption per ton of hydrogen production, providing important support for the large-scale and low-cost application of electrolytic water hydrogen production technology – especially in the context of scarce and expensive precious metal resources. While ensuring catalytic efficiency, this device can also reduce the ineffective loss of precious metals through precise coating, further reducing the comprehensive cost of catalyst layer preparation and highlighting its core value in the electrolytic water hydrogen production equipment system.

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

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