5 results about "Bridging oxygen" patented technology

The present invention provides crystalline compounds, solutions containing the compounds, methods for synthesizing the compounds, and methods for forming patternable coatings. [Solution] Formula R3Sn3(O2CR') 5-x (OH) 2+x A crystalline compound having (μ3-O) is provided, comprising three tin atoms having a central bridging oxygen atom, three tin-bridging carboxylate ligands, two non-bridging carboxylate ligands bonded to tin, and a tin-bridging OH ligand, wherein R comprises a hydrocarbyl group having 1 to 31 carbon atoms, optionally substituted with a heteroatom functional group.

The invention relates to a fast-charge type silicon monoxide negative electrode material and a preparation method and application thereof, and the preparation method of the fast-charge type silicon monoxide negative electrode material comprises the following steps: mixing a lithium lithiation reagent and a silicon monoxide material for preliminary chemical lithiation, and then preparing the fast-charge type silicon monoxide negative electrode material through electrochemical lithiation, the non-bridging oxygen content ([non-bridging oxygen] / Si) is greater than or equal to 3.26. The fast-charging type silicon monoxide negative electrode material provided by the invention can be used for a fast-charging type lithium ion battery, and an interface of lithium oxide and lithium silicate is pre-formed in a chemical lithiation process, so that side reaction between silicon monoxide and an electrolyte is relieved; the high non-bridging oxygen silicate generated in the electrochemical lithiation process is beneficial to forming a rapid lithium ion channel in the silicon monoxide material, so that the diffusion coefficient of lithium ions in the material is improved, and rapid lithiation and delithiation of the silicon monoxide are realized; the prepared silicon monoxide negative electrode has high energy density and also has excellent fast charging capability under high current density.

This invention discloses a method for improving the Raman gain coefficient of tellurate glass. By introducing Ga2O3 into a TeO2-BaF2-Y2O3 tellurate glass matrix, Ga ions enter the glass network and form [GaO4] tetrahedral structural units. These Ga ions then form a Te-O-Ga connection structure with the tellurium oxygen structural units through bridging oxygen bonds, thereby controlling the glass network structure and increasing the proportion of non-bridging oxygen. Raman spectroscopy results show that at 789 cm⁻¹... ‑1 The Te-O-Te vibration peak is enhanced at 480 cm⁻¹. ‑1 Vibrational characteristic peaks associated with the Te-O-Ga structure appear at a certain point. A peak intensity ratio evaluation function is constructed to quantitatively evaluate the glass structure, thereby obtaining tellurate glass materials with high Raman gain coefficients. Through structural tuning, the synergistic enhancement of the two main Raman vibrational modes can be achieved, thus significantly improving the Raman gain coefficient of tellurate glass.

This invention discloses a method for preparing a copper-alkaline earth metal bimetallic composite catalyst and its application in the electrocatalytic generation of multi-carbon products from CO2. Based on an in-situ atmospheric CO2 capture and spatial confinement strategy, this invention mixes copper and strontium salts in an alkaline liquid phase. Utilizing the carbonation kinetics of slow CO2 absorption at the gas-liquid interface, a rod-shaped SrCO3 framework is formed through self-assembly. Subsequently, through confined penetration and selective in-situ reduction by a reducing agent, a high-density Cu-O-Sr bridging oxygen bond is constructed. The structure is then freeze-dried to solidify the catalyst. In this catalytic material, the SrCO3 framework optimizes mass transfer and inhibits copper particle sintering, while the Cu-O-Sr interface stabilizes the metastable Cu through strong electronic interactions. + This significantly reduces the formation energy barrier of the key C-C coupling intermediate (*OCCHO), thereby greatly improving the Faraday efficiency and long-term stability of electrocatalytic CO2 to ethylene conversion.

The invention belongs to the technical field of electro-catalytic water decomposition, and relates to a preparation method and application of a Ta-Co-MOF-P / NF composite material under the combined action of a built-in electric field and an asymmetric bridge oxygen bond. The method comprises the following steps: firstly, performing one-step solvothermal synthesis on a foamed nickel carrier to obtain a bimetal Ta-Co-MOF / NF precursor, and then performing low-temperature phosphating treatment to construct a Co-MOF and CoP heterogeneous interface on a substrate. And a built-in electric field formed by regulating and controlling the phosphorization degree and a Co-O-Ta asymmetric bridge oxygen bond formed by a proper Ta doping amount jointly change the water molecule configuration so as to improve the water decomposition activity. The catalyst can enhance the interaction force with water molecules, and the proportion of free water in the surface water molecule configuration is increased, so that active hydrogen species are easier to dissociate and release, thereby accelerating the alkaline HER reaction kinetics and mass transfer process. The material shows excellent HER catalytic activity and long-term stability in an alkaline environment.