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Palladium nanoparticles/carbon nanofiber composites were successfully prepared

the State Key Laboratory of Electroanalytical Chemistry, Changchun Yinghua Institute, Chinese Academy of Sciences was successfully prepared by Tianyan research group using one-step electrospinning technology, and the electrocatalytic properties of the composites were studied. The relevant results were published in advanced functional materials

carbon nanofibers have similar mechanical strength, thermal stability, conductivity and specific surface area to carbon nanotubes. Both of them can be used as good catalyst carriers for metal nanoparticles, and have broad application prospects in the fields of catalysis, fuel cells and highly sensitive chemical/biological sensors. Because they have similar surface chemical properties, they can be covalently and non covalently modified by similar methods. However, in the process of preparing carbon nanofibers and carbon nanotubes by catalytic vapor deposition, the products often contain impurities such as metal catalysts and graphite particles, which makes it necessary to carry out a cumbersome purification process in application; Modification of metal nanoparticles on the surface of carbon nanofibers and carbon nanotubes by covalent and non covalent methods will affect the structural integrity and conductivity of the carrier materials. Therefore, it is urgent to develop a non-destructive and efficient preparation method of metal nanoparticles/carbon nanofibers or carbon nanotube composites

research shows that electrospinning is a processing technology that uses polymer solution to spray spinning in a strong electric field. The diameter of the prepared fiber is generally between tens of nanometers and a few microns, which is one of the effective methods to obtain nano-sized long fibers. The Tianyan research group of Changchun Chemical Institute dissolved polyacrylonitrile and palladium acetate in dimethylformamide, then electrospun to prepare composite nanofibers, and then prepared palladium nanoparticles/carbon nanofiber composites through reduction and carbonization. In the prepared products, palladium nanoparticles have good dispersion and stability on the surface of carbon nanofibers. The product prepared by this method has no other impurities and can be directly used for catalytic reaction. At the same time, the composite material in this study has high electrocatalytic activity for the oxidation-reduction reaction of hydrogen peroxide and reduced nicotinamide adenine dinucleotide, realizing the direct electrochemical detection of these substances. In addition, carbon nanofibers and their composites prepared by electrospinning method have also been used for electrochemical polyurethane waterproof coatings of other substances, and their utilization is increasing, showing good electrocatalytic activity

this research work has developed a simple and effective method for preparing palladium nanoparticles/carbon nanofibers. There are no other impurities in the product. Jinan new era Gold Testing Instrument Co., Ltd. will form the same sample under the following conditions: the maximum injection pressure of 178mpa exists when conducting impact experiments at high to low temperatures, and there is no need for cumbersome purification process in application. By selecting different metal precursors, this method can also be extended to the preparation of other metal nanoparticles/carbon nanofiber composites. The prepared nanocomposites can be used in the preparation of electrochemical biosensors and fuel cell electrode materials, and are expected to be used as catalysts for organic synthesis reactions

this research work was supported by the "Hundred Talents Program" of the Chinese Academy of Sciences, the National Natural Science Foundation of China and the Jilin Provincial Outstanding Youth Fund

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