379 results about "Cycloalkane" patented technology

The invention discloses a fine circuit pattern anti-diffusion agent as well as a preparation method and a use method thereof, and relates to the technical field of printed circuit board manufacturing. The fine circuit pattern anti-diffusion agent is prepared from the following components in percentage by mass: 0.05 to 0.3 percent of an oleophobic agent, 0.1 to 0.6 percent of a bonding agent, 0.2 to 1.5 percent of an adhesion promoter, 0.5 to 4.0 percent of a wetting agent, 0.5 to 5.0 percent of a cosolvent and the balance of water, the oleophobic agent is a fluorophenylethylamine derivative, the bonding agent is a carbonyl chloride derivative, the adhesion promoter is a sulfur heterocyclic alkane derivative, the wetting agent is a methylsiloxane silane derivative, and the cosolvent is a sulfonyl ketone derivative. According to the fine circuit pattern anti-diffusion agent, an organic layer can be formed on the copper surface of a circuit board, the binding force between the copper surface and printing ink is enhanced, jet printing printing ink is prevented from diffusing on the copper surface, and the product percent of pass of a jet printing solder mask process is improved.

The invention relates to the technical field of hydrogen storage and release, and discloses a cyclic hydrogen storage and release system based on aromatic cycloalkane reaction, which comprises a hydrogenation reaction unit, a dehydrogenation reaction unit, a gas-liquid separation and compression unit and an adsorption and purification unit which are sequentially connected through pipelines, the hydrogenation reaction unit, the dehydrogenation reaction unit and the gas-liquid separation and compression unit are respectively connected with the heat exchange unit; the hydrogen storage function and the hydrogen desorption function are integrally designed, the microwave heat supply dehydrogenation reactor is designed for the dehydrogenation reaction link with high energy consumption, and compared with the prior art, the microwave heat supply dehydrogenation reactor has the advantages that the heat transfer resistance is reduced, the reaction efficiency is improved, and the energy loss is reduced. The designed gas-liquid separation and adsorption purification technology is coupled, only one compressor is used in the whole process, the purification process is effectively simplified, the operation is simple and convenient, the equipment cost and the hydrogen purification cost are reduced, and the hydrogen yield and the hydrogen storage carrier cyclic utilization rate are improved. The system has the advantages of high hydrogen storage and release efficiency, small system size, high mobility and the like.

The invention provides an electrolyte and a lithium battery containing the same. The electrolyte comprises a lithium salt, a solvent and an inducer, the solvent comprises one or more of siloxane compounds as shown in a formula I; the inducer is selected from one or more of C1-C5 halogenated alkanes, C1-C5 halogenated cycloalkanes, C2-C6 halogenated aliphatic ethers and C6-C12 halogenated aromatic compounds. The electrolyte provided by the invention utilizes the intermolecular interaction force between the siloxane compound and the inducer, so that the dissolution of the lithium salt in the solvent is realized, and the electrolyte has high compatibility to a lithium metal negative electrode, has a wide electrochemical window, can be well matched with a high-voltage positive electrode material and a lithium metal negative electrode material, and has a good application prospect. And the cycle life and coulombic efficiency of the battery can be improved.

A process produces unsubstituted or at least singly substituted cycloalkanones by electrochemical oxidation of unsubstituted or at least singly substituted, saturated cycloaliphatic hydrocarbons in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.

The invention discloses a metal modified molecular sieve catalyst and a preparation method and application thereof. The catalyst is a metal-loaded molecular sieve which is modified by post-treatment after a metal component is loaded on the molecular sieve; the molecular sieve is selected from at least one of H-ZSM-5, H-Beta, H-ZSM-35, H-MOR, H-MCM-22, H-ZSM-11 and H-ZSM-22, and the molecular sieve is selected from at least one of H-ZSM-5, H-Beta, the metal is loaded on the molecular sieve through ion exchange and / or impregnation; the post-treatment modification is selected from at least one of heating treatment, water vapor treatment and silanization treatment. The metal component of the catalyst can catalyze dehydrogenation reaction and carbon dioxide activation, the molecular sieve component provides a substance diffusion channel and an acid center, and post-treatment modification can regulate the distribution of the molecular sieve acid center and improve the hydrothermal stability of the catalyst. The catalyst can efficiently promote the coupling reaction of cycloalkane and carbon dioxide, the selectivity of aromatic hydrocarbon reaches 90% or above, and the conversion rate of carbon dioxide reaches 20% or above.

The invention belongs to the technical field of organic dye synthesis and application, and discloses a conjugated compound containing a benzothiophenazine structure as well as a preparation method and application thereof, and the conjugated compound containing the benzothiophenazine structure has excellent photophysical properties, singlet oxygen yield and superoxide anion generation capacity. The novel conjugated compounds ENBO-NI and ENBS-NI containing benzothiophenazine structures are successfully prepared by replacing a benzene ring of Nile blue with a cycloalkane structure and adjusting the electron donating ability of an R1 group. The two compounds have near infrared fluorescence emission, good solubility and relatively high ROS yield. Compared with a classical photosensitizer NB, the singlet oxygen yield of ENBO-NI is increased by about 117.65%, and the singlet oxygen yield of ENBS-NI is as high as 70%. The absorption wavelength of the conjugated compound is in a red light wave band. The preparation process is simple and efficient, large-scale production is easy, and the preparation method has a wide clinical application prospect.

The invention provides an organic boron salt olefin polymerization cocatalyst as well as a preparation method and application thereof, and belongs to the technical field of olefin polymerization catalysts. The organic boron salt olefin polymerization promoter provided by the invention has a structure as shown in a formula I. In the formula I, Ct < + > is a cation capable of enabling a metal alkyl chain to be subjected to alkyl elimination, and R1 is independently selected from carbon or silicon atoms; r2, R3 and R4 are independently selected from hydrogen, alkyl or phenyl respectively; the organic boron salt olefin polymerization cocatalyst provided by the invention is mainly used in olefin polymerization reaction. Compared with a traditional perfluorotetraphenylboron promoter [Ct] + [B (C6F4-R-p) 4]-, the organic boron promoter [Ct] + [B (C6F4-R-p) 4]-has better solubility in non-polar straight-chain alkane and cycloalkane, metallocene and non-metallocene main catalysts can be efficiently activated, a more loose anion-cation pair polymerization active center is formed, and olefin coordination and polymerization are facilitated. And the formula I of the # imgabs0 # is shown in the specification.

The invention relates to the technical field of energy storage safety, and particularly discloses flame-retardant cooling liquid, a preparation method of the flame-retardant cooling liquid, an immersed energy storage device, a data center and electric equipment. According to the present invention, the base oil is at least one of the liquid halogenated alkane containing 2-6 carbon atoms, the liquid halogenated olefin, the liquid halogenated ketone and the liquid halogenated cycloalkane containing 3-6 carbon atoms, such that the high biodegradability of the base oil is maintained, the system viscosity is effectively reduced, the heat dissipation performance is improved, the insulating property of the base oil is significantly improved, and the service life of the base oil is prolonged. Meanwhile, the flame retardance is further enhanced. Therefore, the heat management efficiency of the cooling liquid is remarkably improved while environmental protection and safety are considered, and the cooling liquid has a good application prospect.

The invention provides a method for identifying crude oil types based on comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry, which comprises the following steps: dissolving a crude oil sample to be identified by using a diluent, and adding a 5alpha-androstane standard substance into the system to obtain a crude oil sample; the method comprises the following steps: carrying out chromatographic analysis on a crude oil sample by using comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry, and marking the ratio of the weight sum of n-alkane, isoparaffin, monocycloalkane, bicycloalkane, tricycloalkane, tetracycloalkane and pentacycloalkane in the crude oil sample to the weight of the crude oil sample to be identified as S; marking the ratio of the weight sum of monocycloalkane, bicycloalkane, tricycloalkane, tetracycloalkane and pentacycloalkane in the crude oil sample to the weight of the crude oil sample to be identified as N, and identifying the type of the crude oil sample according to the ratio of S to N. The identification method provided by the invention provides a new way for finely identifying the naphthenic crude oil and estimating the reserves of the naphthenic crude oil.

The invention provides a method for synthesizing an alcohol, aldehyde, ketone or acid compound from a compound containing a saturated carbon-hydrogen bond, which comprises the following steps: under the condition of visible light, carrying out oxidation reaction on the compound containing the saturated carbon-hydrogen bond and an oxidant under the action of a catalyst to obtain the alcohol, aldehyde, ketone or acid compound, wherein the catalyst is a compound capable of generating chlorine or bromine free radicals in situ; the oxidant is selected from oxygen or air; the compound containing the saturated carbon-hydrogen bond is selected from at least one of C1-C20 alkanes, C4-C20 cycloalkanes or aryl alkane compounds; the aryl alkane compound is selected from at least one of compounds as shown in a formula I in the specification. The method provided by the invention has the advantages of abundant and easily available reaction raw material sources, mild reaction conditions, good compatibility of raw material functional groups, simple operation, high reaction safety, environmental protection, low production cost and the like. # imgabs0 #

The invention relates to the technical field of petroleum additives, in particular to a surfactant as well as a preparation method and application thereof. The structure of the surfactant is # imgabs0 #, and in the formula, T is selected from bicycloalkane or polycycloalkane; r and R0 are the same or different and are independently selected from H or C1-C6 alkyl groups; r1, R2, R3, R4 and R5 are the same or different and are respectively and independently selected from H and substituted or unsubstituted sulfonic acid groups; t is a natural number from 0 to 9; the surfactant takes a bicyclic or polycyclic naphthenic base group as a hydrophobic group, a hydrophobic association polymer can be prepared through a soap-free emulsion polymerization method, the molecular weight is adjustable and controllable, the hydrophobic association effect is outstanding, the post-treatment process is simple, and industrial production is facilitated.

A production method of a rubber plasticizer is characterized in that a solvent extraction method is used, a first solvent comprises one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide and enters the upper portions of a first extraction tower and a second extraction tower, a second solvent is alkane and / or cycloalkane with the carbon number of 6-20 and enters the lower portions of the three extraction towers, raw material oil is extract oil, and the second solvent is one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide. Raw oil enters from a middle feed port of the first extraction tower; raffinate flowing out of the top of the first extraction tower enters a middle feed port of the second extraction tower after part of the solvent is recovered; evaporating secondary raffinate flowing out from the top of the second extraction tower to recover the solvent, thereby obtaining the rubber plasticizer; heating a material flowing out from the top of the third extraction tower, recovering part of solvent, pumping into a raw oil inlet of the primary extraction tower by using a pump, mixing with raw oil, and entering the primary extraction tower; and evaporating the effluent extract at the bottoms of the first extraction tower and the third extraction tower to recover the solvent to obtain secondary extract oil.

To provide materials for organic devices such as materials for organic EL elements, comprising compounds different from conventional ones, in order to increase options for materials for organic EL elements.SOLUTION: Options for materials for organic devices such as materials for organic EL elements are increased by condensing a cycloalkane to a polycyclic aromatic compound in which a plurality of aromatic rings are linked together by boron atoms, oxygen atoms, and the like. By using a novel cycloalkane-condensed polycyclic aromatic compound as a material for an organic EL element, for example, an organic EL element having excellent emission efficiency and element life is provided.SELECTED DRAWING: None

To provide a compound useful as a material for an organic device such as an organic electroluminescent element.SOLUTION: Polycyclic aromatic compounds having a structure consisting of one or two or more structural unit (s) represented by the formula (1); (Ra1 to Ra3, Rb1 to Rb4, Rc1 to Rc4 are independently H or substituents; provided that at least one of Rc1 to Rc4 is a group represented by the formula (1-1); Y1 is B; and are independently> N-RNX; RNX is substituted / unsubstituted aryl; at least one of the aryl ring and the heteroaryl ring in the above structure may be fused with at least one cycloalkane, and H in the above structure may be replaced by D. X1 X2. ) SELECTED DRAWING: None

An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles each include a metal oxide particle and a surface treatment layer covering at least a part of the surface of the metal oxide particle. The surface treatment layers contain a component derived from an organic siloxane compound and at least one of aluminum oxide and silica. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid with a carbon number of at least 8 and no greater than 20 and a second repeating unit derived from a diamine compound with a cycloalkane structure.

The invention belongs to the technical field of asphalt processing, and discloses high-viscosity rubber modified asphalt and a preparation method thereof.The high-viscosity rubber modified asphalt is prepared from 70 # matrix asphalt, graded vulcanized rubber powder, a linear SBS polymer, C5 petroleum resin type terpene resin, cycloalkane oil, polyisobutene modified nano-zinc oxide and a sulfur cross-linking stabilizer; by combining a three-dimensional network structure formed by the cross-linking stabilizer, the layering risk caused by density difference is remarkably reduced, the factory production and transportation period is prolonged, the anti-aging performance is further improved through the synergistic effect of the nanometer material and vulcanization, the asphalt is endowed with better elastic recovery and anti-fatigue capacity, and the service life of the asphalt is prolonged. And the whole formula breaks through the limitation of the mixing amount of the traditional rubber powder, the fluidity of the mixture is optimized while the high viscoelastic characteristic is ensured, the problems of wheel sticking during paving and non-uniform void ratio are solved, the construction efficiency and the pavement durability are considered, and the efficient cyclic utilization of waste rubber resources is promoted.

The present application provides an electrolyte additive, an electrolyte and a battery, wherein the electrolyte additive includes a first additive and a second additive; the first additive includes a compound represented by formula I: R1, R2 and R3 each independently include any one of H, F, C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C2-C4 alkynyl, C5-C7 cycloalkane, R4 substituted phenyl and R5 substituted benzyl; R4 and R5 are each independently selected from H, C1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl, C1-C4 fluoroalkyl, C 2‑ Any one of a C4 fluoroalkenyl group and a C2-C4 fluoroalkynyl group; the second additive comprises an isocyanate compound. The electrolyte additive of the present application forms an interfacial film on the electrode surface that is highly stable, smooth, uniform in thickness, flexible, highly conductive, and corrosion-resistant, resulting in excellent cycling stability and high-temperature storage performance under high-voltage conditions.

The present invention discloses a metal porphyrin containing a hexafluoropropylene trimer group, a preparation method thereof and an application; a benzaldehyde derivative containing a hexafluoropropylene trimer group, freshly distilled pyrrole, and a metal acetate are dissolved in a mixed solvent of methanol and chloroform, and under a nitrogen atmosphere, the reaction is stirred at 0 to 80 °C for 6.0 to 168.0 h. After the reaction is completed, through post-treatment, a metal porphyrin containing a hexafluoropropylene trimer group is obtained; the metal porphyrin containing a hexafluoropropylene trimer group described in the present invention can be used in the reaction of catalytic oxidation of cycloalkanes by O2. The cycloalkane oxidation method provided by the present invention has high selectivity for partial oxidation products (cycloalkyl alcohols and cycloalkyl ketones), low contents of explosive peroxides and deeply oxidized product aliphatic diacids, and is a safe, effective cycloalkane oxidation method with low separation energy consumption.

The present disclosure relates to an inhibitor for promoting collagen expression, the inhibitor having a structural formula as shown in the following formula (I). The azacycloalkane compound and a pharmaceutical composition thereof provided in the present disclosure have significant Rho kinase inhibitory activity, have better enzymatic activity and cell activity than existing ROCK inhibitors such as Ripasudil, Netarsudil and belumosudil, and have JAK inhibitory activity. Therefore, the compound and composition have great application potential.

The invention discloses a high-yield and low-carbon-deposition regulation and control method and system for a continuous regenerative catalytic reforming reaction. The method comprises the following steps: at the beginning, setting a weighted average inlet temperature for the four-in-one reforming reactor and setting an inlet temperature of each bed layer; measuring the content of naphthenic hydrocarbon in naphtha to be added at the beginning, and setting the initial average pressure of the four-in-one reforming reactor according to the content of naphthenic hydrocarbon in naphtha to be added; naphtha is added into the four-in-one reforming reactor for a reaction; in the reaction process, the weighted average inlet temperature of the four-in-one reforming reactor, the inlet temperature of each bed layer, the catalyst circulation rate and the average pressure are regulated and controlled in real time; and ending the experiment. The method breaks through the critical path of the current technical bottleneck, and has important significance for improving the product selectivity of the continuous regeneration catalytic reforming process, reducing the energy consumption and prolonging the service life of the catalyst.

A method for transporting hydrogen may comprise, at a first hydrocarbon processing facility, passing a heavy naphtha stream, a C9+ aromatic compounds-containing stream, and an input hydrogen-containing stream to a hydrotreater to form a hydrotreated effluent stream; passing the hydrotreated effluent stream to a separation unit to form a naphthenics-containing stream and a separation unit effluent stream; transporting the naphthenic stream to a second hydrocarbon processing facility; and at the second hydrocarbon processing facility, passing at least a portion of the naphthenic stream to a dehydrogenation unit to form a hydrogen product stream. The first hydrocarbon processing facility and the second hydrocarbon processing facility may be separated by a distance of at least 100 km. Further disclosed herein are methods of processing hydrogen which produce aromatic compounds, including C9+ aromatic compounds containing streams.

The present application relates to a kind of polycrystalline cluster ZSM-5 molecular sieve and its preparation method and application.The polycrystalline cluster ZSM-5 molecular sieve has at least two typical most probable pore diameters in the range of 5-50nm.During the preparation of the molecular sieve, two alkali sources (M1 and M2) are used, wherein the mass ratio of the two alkali sources M1 / M2 satisfies the following relationship: 0.1≤n(M1) / n(M2)≤10.0.The polycrystalline cluster ZSM-5 molecular sieve has higher propylene selectivity for large molecule naphthene ring-opening cracking.

The invention provides a compound, a material for organic elements, an ink composition, an organic electroluminescent element, a display device, and a lighting device. The present invention increases options for organic element materials such as organic EL element materials by condensing a cycloalkane in a polycyclic aromatic compound in which a plurality of aromatic rings are linked by a boron atom and an oxygen atom or the like. Also provided is an organic EL element having excellent luminous efficiency and element life, for example, by using the novel cycloalkane-condensed polycyclic aromatic compound as a material for an organic EL element.

The invention relates to a method for detecting a clearing agent main agent in gasoline, and the method comprises the following steps: carrying out thin-layer chromatography detection on a to-be-detected sample, and determining the composition of the clearing agent main agent in the concentrated to-be-detected sample according to color spot distribution on an obtained thin-layer chromatography plate, wherein the clearing agent main agent comprises one or more of a polyether amine clearing agent, a polyisobutene amine clearing agent and a Mannich base clearing agent; the thin-layer chromatography detection sequentially comprises developing and developing treatment; a developing agent for developing comprises one or more of a developing agent I, a developing agent II and a developing agent III; the developing solvent I is methanol, and the developing solvent II and the developing solvent III comprise one or more of alcohol with the carbon atom number of 1-6, aliphatic hydrocarbon with the carbon atom number of 5-12 and cycloalkane with the carbon atom number of 5-12. According to the method provided by the invention, whether the clearing agent main agent is added into the sample to be detected or not can be rapidly determined, and the type of the clearing agent main agent can be rapidly and accurately detected.

A method for producing liquid organic hydrogen carriers (LOHCs). The method includes passing a hydrocarbon feed stream rich in aromatics to a selective hydrogenation reactor configured to saturate olefins selectively without aromatic saturation to generate a hydrotreated feed stream; passing the hydrotreated feed stream to a fractionation unit to form a light fraction stream and a heavy fraction stream split at 218℃ to 250℃; and passing the light fraction stream to an aromatics extraction unit to form an aromatic compounds stream. The method also includes passing the non-aromatic compounds stream to a naphthene separator to generate a naphthenic stream; passing the aromatic compounds stream, the naphthenic stream, and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream; and passing the hydrotreated effluent stream to a separator to remove unsaturated compounds to isolate the saturated compounds as a LOHC stream.

The invention discloses a petroleum-based insulating oil carbon type composition calculation method and device and computer equipment. The method comprises the following steps: judging whether a viscosity-weight constant is greater than zero or not; if the viscosity-weight constant is greater than zero, calculating specific refraction according to the refractive index and the density; if the viscosity-weight constant is smaller than or equal to zero, the viscosity-weight constant is calculated firstly, and then the specific refraction is calculated; calculating the percentage composition of cycloalkane carbon atoms, paraffin carbon atoms and aromatic hydrocarbon carbon atoms, and judging whether the mass fraction of the sulfur content is smaller than a threshold value or not; if the mass fraction of the sulfur content is smaller than a threshold value, a calculation result is directly output; if the mass fraction of the sulfur content is greater than a threshold value, correcting the percentage composition of cycloalkane carbon atoms, paraffin carbon atoms and aromatic hydrocarbon carbon atoms through a correction formula; finally, the calculated or corrected percentage composition of the cycloalkane carbon atoms, the paraffin carbon atoms and the aromatic hydrocarbon carbon atoms and the calculated viscosity-weight constants are displayed through a graphical interface, the test efficiency is improved, personal errors are reduced, and the professional requirement is low.

The invention provides an azacycloalkane compound as shown in a formula I, pharmaceutically acceptable salt, hydrate, isomer, prodrug or a mixture thereof, a pharmaceutical composition containing the azacycloalkane compound, and application of the azacycloalkane compound and the pharmaceutically acceptable salt, hydrate, isomer, prodrug or the mixture thereof in preparation of drugs for preventing, relieving or treating related diseases caused by interaction with Menin-MLL protein.

The present invention relates to the field of petrochemical technology and is a method for increasing the cycloalkane content of a white oil raw material for thermoplastic elastomers. The method comprises mixing a paraffin-based distillate with hydrogen and introducing it into a hydrorefining reaction zone, causing it to contact and react with a hydrorefining catalyst, removing impurities, and performing aromatic saturation to obtain a hydrorefined product oil. The hydrorefined product oil is mixed with hydrogen and introduced into a hydromodification reaction zone, causing it to contact and react with a hydromodification catalyst to obtain a hydromodified product oil. The hydromodified product oil is subjected to regular vacuum distillation to obtain a distillate having a boiling point greater than 420°C. The preparation method of the present invention is simple, environmentally friendly, and has mild reaction conditions. It can effectively increase the cycloalkane content while improving the production efficiency of the product. The obtained high-cycloalkane-content white oil raw material for thermoplastic elastomers, when used to prepare elastomer white oil, ensures good compatibility with polymer materials and safety performance during processing, while also ensuring the performance of rubber and plastic products.

The invention provides a cycloalkane separation method, a computer program product and a cycloalkane detection system. The method comprises the steps that a detection device is controlled to separate compounds, the one-dimensional retention time of all the compounds in a one-dimensional chromatographic column is obtained, the two-dimensional retention time of all the compounds in a two-dimensional chromatographic column is obtained, the one-dimensional retention time is the time needed for separating out the compounds through the one-dimensional chromatographic column, and the two-dimensional retention time is the time needed for separating out the compounds through the two-dimensional chromatographic column. The two-dimensional retention time is the time required for separating the compound by the two-dimensional chromatographic column; a target compound in the separated compounds is determined according to the one-dimensional retention time and the two-dimensional retention time of the separated compounds, and the target compound is cyclohexane or cyclopentane; the content of the target compound is obtained, the content is sent to target equipment, and the target equipment is equipment used by the target object, so that the target object is guided to improve the catalyst. According to the scheme, the problem that cycloalkanes (cyclohexane or cyclopentane) cannot be rapidly measured in the prior art is solved.

This invention relates to rare-earth single-atom doped alumina-supported platinum cluster catalysts, their preparation methods, and applications. The catalyst comprises a catalyst support and platinum nanoclusters dispersed on the catalyst support. The catalyst support is an alumina support doped with rare-earth elements in single-atom form. The preparation method includes the following steps: Step 1: preparing a rare-earth-aluminum composite metal oxide precursor; Step 2: preparing a catalyst support; Step 3: loading platinum onto the catalyst support; Step 4: activating the platinum-supported catalyst support. The catalyst is applied in the dehydrogenation reaction of cycloalkane. This invention, by precisely doping rare-earth elements into the alumina lattice in single-atom form, constructs stable rare-earth-oxygen active sites within the lattice, significantly promoting the migration and diffusion of hydrogen atoms from the platinum clusters to the support surface, thereby greatly enhancing the hydrogen spillover effect, improving the utilization efficiency of active hydrogen, and achieving precise control over complex reaction pathways.