3results about How to "High redox activity" patented technology

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

The invention discloses a Mo-assisted co-doped disordered rock salt Li1. 3Mn0. 4Nb0. 3O2 lithium-rich positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: taking metal oxides such as Li2CO3, Mn2O3, Nb2O5, MoO2, SnO2 and Fe2O3 as precursors, weighing according to a specific stoichiometric ratio, and additionally adding about 10% of Li2CO3 to compensate for Li loss; the preparation method comprises the following steps: fully mixing, carrying out high-energy ball milling in an argon atmosphere, tabletting, heating to 1000 DEG C at a speed of 5 DEG C / min in the argon atmosphere in a tubular furnace, calcining for a certain time at a constant temperature, naturally cooling, and rapidly transferring to a glove box. The positive electrode material is used for the lithium ion battery, the charge-discharge specific capacity and the energy density of the lithium ion battery can be improved, the preparation process is simple, the cost is low, and large-scale production is easy.

This invention belongs to the field of new energy storage technology and discloses a method for preparing and applying anionic medium-entropy MXene electrode material. The chemical formula of the anionic medium-entropy MXene material is M. n+ 1X n T x The X site contains four anions: carbon, nitrogen, oxygen, and fluorine, forming a medium-entropy composition. The preparation method includes: mixing TiC, Ti, Al, TiN, Al2O3, and AlF3 in a specific molar ratio, and sintering at high temperature under an inert atmosphere to obtain the anionic medium-entropy MAX phase; then removing the Al layer by etching, followed by intercalation, ultrasonic exfoliation, and drying to obtain few-layer anionic medium-entropy MXene nanosheets. This invention achieves a medium-entropy effect by having multiple anions co-occupy the X site, and for the first time, by introducing highly electronegative fluorine (F) anions to co-occupy the X site with carbon, nitrogen, and oxygen, thus significantly regulating the interlayer dynamic hydrogen bond network and redox activity. In particular, the strong electron-withdrawing ability of F and its unique interaction with hydrogen bonds effectively suppress side reactions and stabilize the interlayer structure, resulting in high volumetric capacity, excellent rate performance, and long-term cycling stability.