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High-temperature thermal shock and material synthesis: The team of Sung-Yool Choi and Dong-Ha Kim used ultra-fast flash thermal shock (FTS) annealing technology to synthesize single-atom stable nitrogen-doped graphene catalysts in a conventional air environment through ultra-high temperature (>2850°C), short time (<10 milliseconds) and extremely high heating and cooling rate (105 K/s). 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 achieving precise control of the microstructure of the material. Both use the violent reaction conditions brought about by high-temperature thermal shock to promote the efficient synthesis of target materials.
Rapid heating and performance optimization: FTS technology achieves efficient preparation of single-atom catalysts through rapid heating, optimizes the distribution of metal atoms and the interaction with the carrier, and significantly improves the catalytic performance. FJH technology is also commonly used for rapid heating and performance optimization in the preparation of other materials. For example, in the preparation of carbon-based materials such as graphene, the defect density and electronic structure of the material can be regulated by rapid heating, thereby optimizing its conductivity and chemical activity.
High efficiency and low cost: FTS technology can complete the preparation of catalysts in a very short time and is highly efficient. FJH technology also greatly shortens the time for material preparation, improves production efficiency, and reduces production costs with its characteristics of rapid heating and cooling. The combination of the two can further improve the efficiency and performance of material preparation, reduce production costs, and provide technical support for the large-scale production of high-performance catalysts.
Environmental friendliness: FTS technology avoids the high energy consumption and environmental pollution problems in the traditional vacuum high-temperature annealing process, and does not require the use of solvents or reaction gases during the material synthesis process. FJH technology also does not require the use of solvents or reaction gases, and has low energy consumption, which meets the current requirements of environmental protection and sustainable development.
Further optimization of catalyst performance: FJH technology can be applied to the subsequent treatment of catalysts treated by FTS technology. Through further rapid heat treatment, the crystal structure and defect distribution of the catalyst can be optimized to improve its catalytic activity and stability. For example, more uniform defect distribution and stronger metal-support interaction can be achieved through FJH technology, which can enhance the anti-sintering ability and long-term stability of the catalyst.
Development of new catalysts: Combine the rapid synthesis ability of FJH technology and the structural regulation advantage of FTS technology to explore and develop new catalysts. For example, try to use FJH technology to perform rapid heat treatment and structural optimization on other types of metal oxides or composite materials, and then use FTS technology to synthesize them to achieve higher performance and better application effects.
Optimization and standardization of process parameters: In-depth study of the synergistic mechanism of FJH technology and FTS technology in the material 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 catalysts.
Electrospinning Nanofibers Article Source:
https://doi.org/10.1021/acsnano.3c02968
