Flash Joule Heating Machine: Ultrafast high-temperature thermal shock for the preparation of highly efficient Pd/C catalysts for Tris hydrogenation reduction

Similarity of technical principles and applications

Rapid heating and material structure regulation: Professor Yuan Qunhui and Professor You Hengzhi's team used ultra-fast high-temperature thermal shock (HTS) technology to prepare Pd/C catalysts. Through short-term high-temperature treatment (800℃, 2 seconds), palladium particles with small size (5.5 nm) and uniform distribution were quickly generated. Flash Joule Heating Machine (FJH) technology can also quickly heat materials to high temperatures, triggering the reorganization of the internal structure of the material and the formation of defects, and achieve precise regulation of the material's microstructure. Both use the non-equilibrium state brought about by rapid heating to promote the optimization of the internal structure of the material, providing favorable conditions for the efficient catalytic performance of the catalyst.

Regulation of defects and active sites: In the preparation of Pd/C-HTS catalysts, HTS technology not only achieves the small size and uniform distribution of palladium particles, but also may introduce defects in the carbon carrier, increase the number of active sites, and thus improve catalytic activity. Flash Joule Heating Machine technology is also commonly used to regulate material defects and active sites in the preparation of other materials. For example, in the preparation of carbon-based materials such as graphene, defects can be introduced and the distribution of active sites can be regulated by rapid heating. This precise control of defects and active sites is crucial to improving the catalytic performance of the catalyst and helps optimize the reaction efficiency and selectivity of Tris hydrogenation synthesis.

Complementarity of technical advantages

High efficiency and low cost: HTS technology can complete the preparation of catalysts in a short time and is highly efficient. Flash Joule Heating Machine technology also greatly shortens the time for material preparation and improves production efficiency with its characteristics of rapid heating and cooling. The combination of the two can further improve the efficiency of catalyst preparation, reduce production costs, and provide technical support for large-scale production of high-efficiency catalysts.

Environmental friendliness: HTS technology avoids the long-term energy consumption and possible environmental pollution in traditional high-temperature treatment processes. Flash Joule Heating Machine technology does not require the use of solvents or reaction gases during the material synthesis process and is an environmentally friendly preparation method. The combination of the two helps to achieve a greener and more sustainable catalyst preparation process, which meets the current requirements of environmental protection and sustainable development.

Combination direction of future research and application

Further optimization of catalyst performance: Flash Joule Heating Machine technology can be applied to the subsequent treatment of Pd/C-HTS catalysts. Through further rapid heat treatment, the metal particle size, distribution and interaction with the carrier of the catalyst can be optimized to improve its catalytic activity and stability. For example, more uniform metal particle distribution and stronger metal-carrier interaction can be achieved through FJH technology, which can enhance the catalyst's anti-sintering ability and long-term stability.

Development of new catalysts: Combine the rapid synthesis capability of Flash Joule Heating Machine and the structural regulation advantages of HTS technology to explore and develop new catalysts. For example, try to use FJH technology to rapidly heat treat and optimize the structure of other types of precious metals or non-precious metals with different carrier materials to achieve higher catalytic activity and better selectivity.

Optimization and standardization of process parameters: In-depth study of the synergistic mechanism of Flash Joule Heating Machine technology and HTS technology in the catalyst preparation process, and optimize process parameters such as heating temperature, heating time, current density, etc. Establish a standardized process flow to ensure the stability and consistency of catalyst performance and provide reliable technical support for the commercial production and application of Tris hydrogenation synthesis catalysts.

Electrospinning Nanofibers Article Source:

https://doi.org/10.1016/j.cej.2025.159331