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High-temperature thermal shock and material synthesis: Zhu Sheng's team used confined flash Joule heating (CFJH) technology to complete the conversion of polytungstate (POM) precursors in carbon nanotubes (CNTs) in less than 1 second through instantaneous high-temperature flash evaporation (up to 3700K), and synthesized Pt1/WCx@CNT single-atom catalysts. Flash Joule Heating Machine (FJH) technology can also quickly heat materials to high temperatures, trigger chemical reactions inside the materials or with external substances, and achieve rapid synthesis and structural transformation of materials. 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: CFJH technology achieves efficient synthesis of Pt1/WCx@CNT catalysts through rapid heating, optimizes hydrogen adsorption/desorption behavior, and significantly improves 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. This association between rapid heating and performance optimization is of great significance for the development of high-performance electrocatalysts.
High efficiency and low cost: CFJH technology can complete the synthesis 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 catalyst preparation, reduce production costs, and provide technical support for the large-scale production of high-efficiency electrocatalysts.
Environmental friendliness: CFJH technology avoids traditional high-temperature furnace treatment and does not require any solvents and special gases. It is a solvent-free and special gas-free green synthesis method. FJH technology does not require the use of solvents or reaction gases during the material synthesis process and has low energy consumption. 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.
Further optimization of catalyst performance: FJH technology can be applied to the subsequent treatment of Pt1/WCx@CNT 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 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 advantages of CFJH technology to explore and develop new electrocatalysts. 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 FJH technology and CFJH technology in the catalyst preparation process, 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 guarantees for the commercial production and application of electrocatalysts.
Electrospinning Nanofibers Article Source:
https://doi.org/10.1021/acs.nanolett.4c05097
