416 results about "Coordination polymer" patented technology

The invention relates to the technical field of electrocatalysis development, in particular to a Co-based two-dimensional coordination polymer electrocatalyst and a preparation method and application thereof. The chemical formula of the Co-based two-dimensional coordination polymer electrocatalyst is {[Co3 (H2O) 4 (5-CMOIA) 2]. 10H2O} n, an X-ray single crystal diffraction test shows that the coordination polymer belongs to a triclinic system and a P-1 space group, and the minimum asymmetric unit of the coordination polymer contains three Co (II) ions, two deprotonated (5-CMOIA) 3-ligands, four coordination water molecules and ten crystal water molecules. The Co-based two-dimensional coordination polymer has relatively high specific surface area and rich active sites, is good in dispersity in a solution, and can be applied to the field of electrocatalysis.

The invention discloses a preparation method and application of a manganese-based amino acid coordination polymer, and belongs to the technical field of nano-enzymes and nano-drugs. Divalent manganese salt, histidine and other amino acids are subjected to a co-precipitation reaction to prepare the manganese-based amino acid coordination polymer, and the polymer is of a nanoparticle structure, small in size and high in stability, has enzyme-like activity, catalyzes hydrogen peroxide to generate high-toxicity hydroxyl free radicals and is used for specifically killing tumor cells. The catalyst has the capability of catalytically generating singlet oxygen in the presence of hydrogen peroxide. Meanwhile, the manganese-based amino acid complex has glutathione oxidase-like activity, consumes glutathione to overcome the resistance of tumors to oxidative stress, improves the chemical kinetic curative effect, and has anti-tumor application potential.

The invention belongs to the technical field of gas sensor materials, and particularly relates to a novel high-conductivity conjugated coordination polymer gas-sensitive material, an ammonia gas sensor and a preparation method. Copper salt and 1, 5-diamino-4, 8-dihydroxy anthraquinone or 1-amino-4-hydroxy anthraquinone are used as raw materials, two novel high-conductivity conjugated coordination polymer materials are prepared by adopting a simple solvothermal method, and the preparation method is simple in process and can be used for mass production of materials. The obtained material can form a film on planar electrodes at two ends to prepare a resistance-type ammonia gas sensor, so that ammonia gas can be detected in a concentration range of 2.3 ppb-100 ppm, and the defects of narrow detection range and insufficient sensitivity of a single material in the prior art are overcome.

The invention belongs to the field of preparation of secondary battery electrode materials, and particularly relates to an anthraquinone conjugated coordination polymer electrode material for a secondary battery as well as a preparation method and application of the anthraquinone conjugated coordination polymer electrode material. The structure of the anthraquinone conjugated coordination polymer is shown as a formula # imgabs0 #, R1 and R2 are respectively and independently selected from O, S or NH, and R1 and R2 are not O at the same time; r3 and R4 are independently selected from a hydrogen atom, an amino group, a hydroxyl group or a sulfydryl group; m is a transition metal ion. The anthraquinone conjugated coordination polymer is used as a positive electrode of a secondary battery, the anthraquinone conjugated coordination polymer, a conductive agent and a binder are uniformly mixed in a dispersion liquid, then a current collector is uniformly coated with the mixture, and then vacuum drying is performed to obtain the positive electrode of the secondary battery. The technical problems of low specific capacity, low energy density and rapid degradation of capacity and cycle performance of the secondary battery are solved.

The invention discloses a porous coordination polymer tanning agent and a preparation method and application thereof, and belongs to the technical field of leather tanning agents. According to the preparation method disclosed by the invention, a metal salt solution and an organic ligand solution are used as raw materials, and the porous coordination polymer tanning agent is prepared through calcination activation treatment; according to the method, dependence on an expensive organic solvent is avoided, the synthesis condition is changed from high temperature and high pressure to room temperature and normal pressure, energy consumption is reduced, and the risk of environmental pollution is remarkably reduced; meanwhile, the use of chromium ions is avoided, the reaction conditions of the porous coordination polymer tanning agent are moderated, and the organic solvent is removed, so that the pollution to the environment and the potential threat to the human health in the preparation process and the application process of the tanning agent are effectively reduced, and the requirement of large-scale production can be met.

The invention provides an amorphous conjugated coordination polymer aerogel material as well as a preparation method and application thereof. The method comprises the following steps: firstly, mixing a metal salt solution and a conjugated organic ligand solution, then heating the mixed solution to promote coordination assembly and induced crosslinking to prepare conjugated coordination polymer wet gel, and then drying to obtain crystalline conjugated coordination polymer aerogel; and carrying out ultraviolet radiation treatment on the obtained crystalline conjugated coordination polymer aerogel to finally obtain the amorphous conjugated coordination polymer aerogel. The amorphous conjugated coordination polymer aerogel material prepared by the invention has the advantages of flexible and adjustable molecular structure, unsaturated coordination metal monatomic active sites, high electrochemical activity and the like. In addition, the preparation process is simple and easy to operate, and the obtained amorphous conjugated coordination polymer aerogel material is good in performance and wide in application prospect.

The invention discloses a cobalt transition metal coordination polymer as well as a preparation method and application thereof, and belongs to the technical field of metal organic complex material photocatalysts, the chemical formula of the cobalt transition metal coordination polymer is [Co (L) (2, 2-biby). 2H2O] n, L is 2-(3-carboxyl phenyl)-6-carboxyl benzimidazole, and n is 1-3. 2, 2, 2-biby is 2, 2 '-dipyridyl; n represents the degree of polymerization and is a positive integer; the cobalt transition metal coordination polymer belongs to a P212121 space group of an orthorhombic crystal system. According to the cobalt transition metal coordination polymer and the preparation method and application thereof, the cobalt transition metal coordination polymer can serve as a photocatalyst, has good photocatalytic performance and can serve as a potential photocatalyst to catalyze and degrade organic pollutants in water.

The invention relates to the technical field of photoluminescence materials, and particularly discloses a coordination polymer scintillator, a flexible scintillator film and application thereof.The prepared coordination polymer scintillator emits green light under a 360-nm excitation light source and under irradiation of an X-ray light source, has excellent linear responsiveness to X-rays and can be applied to the field of photoluminescence materials. According to the present invention, the prepared scintillator film has the obvious thermal activation enhanced luminescence, when the signal-to-noise ratio is 3, the lowest detection limit of the scintillator can achieve 29.6 nGy / s, the value is about 186 times lower than the detection limit (5500 nGy / s) required by a typical medical imaging system, and the prepared scintillator film can achieve the X-ray imaging effect on different objects, such that the X-ray imaging effect can be easily achieved. The scintillator film prepared by the invention can completely replace the current commercial scintillator.

The invention provides a preparation method of a metal organic coordination polymer mediated silver nanowire. The preparation method comprises the following steps: respectively preparing a supramolecular assembly agent, a high-molecular polymer protective agent, halide salt and a soluble silver salt solution; the supramolecular assembly agent is at least one of cinnamic acid, p-coumaric acid, caffeic acid, tannin and the like; halide salt and a supramolecular assembly agent are sequentially added into the soluble silver salt solution to form a silver ion-supramolecular assembly agent coordination polymer solution; adding a high-molecular polymer protective agent into the silver ion-supramolecular assembly agent coordination polymer solution, stirring, and reacting in a dark place at-20 to 80 DEG C for 0.1 to 10 hours; and after the reaction is completed, centrifuging, washing, drying in vacuum and re-dispersing to obtain the silver nanowire. According to the technical scheme, the prepared silver nanowire is superfine in diameter, the end has a curled shape, the interior contains defects, the reaction can be carried out in water, the productivity is high and is larger than 80 g / L, and the technology is simple and more environmentally friendly.

The invention belongs to the technical field of crystalline materials, and relates to a metal-organic coordination polymer crystal material, in particular to a nickel-based double-ligand coordination polymer crystal material as well as a preparation method and application thereof. The chemical formula of the nickel-based double-ligand coordination polymer crystal material is {[Ni (1, 4-bib) (BDC) (H2O) 2]. (1, 4-bib) 0.5. H2O} n, and the preparation method comprises the following steps: dissolving NiCl2. 6H2O, H2BDC and 1, 4-bib in a DMF / water mixed solution with a volume ratio of 1: 1, sealing, carrying out a solvothermal reaction, heating at a constant temperature of 90.0 DEG C for 3 days, and slowly cooling the system to room temperature to obtain a green bulk crystal G-Ni. The nickel-based double-ligand coordination polymer crystal material can be applied to Ag < + > recognition and antibiotic detection.

The invention relates to the field of photoelectric materials, in particular to a Cu (I) conductive coordination polymer material and a preparation and application method thereof. The material is obtained by reaction of pytrz and cuprous halide at room temperature, and pytrz is 3-(4H-1, 2, 4-triazole-4-yl) pyridine. According to the invention, two conductive coordination polymers with high stability are designed and synthesized, and the conductive coordination polymers have good thermal stability and small band gap. The temperature-related conductivity measured by the complex as a semiconductor and alternating current impedance is 2.18 * 10 < 4 > Scm < 1 > and 5.85 * 10 <-6 > Scm < 1 > at room temperature, the conductivity of the complex 1 and the conductivity of the complex 2 are 1.01 * 10 < 2 > Scm < 1 > and 8.76 * 10 <-5 > Scm < 1 > at 100 DEG C along with temperature rise, and the complex shows good conductivity performance and has wide application prospects.

The invention provides a cobalt-doped nickel-based coordination polymer catalyst and a preparation method and application thereof.The preparation method comprises the following steps that S1, Schiff base and 4, 4 '-dipyridyl are placed in a mixed solvent to be mixed, acid is added into the mixed solvent to obtain a precursor solution, the precursor solution and foamed nickel are mixed, a coordination reaction is conducted through a hydrothermal method, and a nickel-based coordination polymer is obtained; and S2, dissolving cobalt salt in an organic solvent, adding into the nickel-based coordination polymer, mixing, and carrying out a hydrothermal method to obtain the cobalt-doped nickel-based coordination polymer catalyst. The preparation method is simple in process, low in cost and good in repeatability.

The invention discloses a plasma-etched Hofmann metal coordination polymer and a preparation method and application thereof in oxygen evolution reaction, and aims at achieving the preparation method of rapid and deep reconstruction in the oxygen evolution reaction, NiFe-Ni PBA nanosheet powder is prepared through a simple precipitation method, then plasma etching treatment is carried out, and the plasma-etched Hofmann metal coordination polymer is obtained. CN vacancies and Ni ion vacancies are generated. The invention further discloses application of the electrocatalyst in water electrolysis oxygen evolution reaction, deep reconstruction is achieved in the oxygen evolution reaction process, and the Re-P-NiFe-Ni PBA catalyst composed of metal oxyhydroxide is prepared. In addition, excellent oxygen evolution reaction activity and stability can be shown in alkaline electrolyte, alkaline simulated seawater and alkaline actual seawater, and good application prospects are achieved.

The invention provides a coordination polymer based on pesticide ligands as well as a preparation method and application thereof, and belongs to the technical field of compounds and preparation thereof. In the step process of preparing the coordination polymer based on the pesticide ligand by using the preparation method of the coordination polymer based on the pesticide ligand, a metal is used as a central metal, and pesticide molecules, carboxyl-containing organic anion ligands or N-containing ligands are used as ligands to form a double-ligand type coordination polymer. The coordination polymer has high pesticide occupancy and sensitive pH responsiveness, and release concentrations of different degrees can be achieved by adjusting the pH. The coordination polymer based on the pesticide ligand has a slow-release bactericidal effect, can prolong the action time of the pesticide, and provides a new thought for the coordination polymer material as a slow-release bactericide.

The invention discloses a method for low-alkalinity flotation of lead-zinc (silver-containing) polymetallic ore based on a heterocyclic sulfydryl coordination polymer, which comprises the following steps of: adjusting the pH value of ore pulp to 7.5 + / -0.3, and sequentially carrying out roughing, scavenging and concentration by adopting a composite collecting agent according to a gradient flotation procedure; wherein the mass concentration of the ore pulp is 20-40%; the adding amount of the composite collecting agent is 150-300g / t of ore pulp; the composite collecting agent is composed of a modified heterocyclic sulfhydryl compound, C12-C18 alkylamine polyoxyethylene ether and a star-shaped branched nonionic surfactant according to the mass ratio of 1: (1-3): (0.5-2). According to the method, the complex silver polymetallic ore is subjected to efficient flotation under the low-alkalinity condition by applying the composite collecting agent based on the heterocyclic sulfydryl coordination polymer. Through deep exploration and optimization of a flotation reagent system, process parameters and a microcosmic action mechanism, the recovery rate of metal such as silver, copper and lead is remarkably increased, and the ore dressing cost is greatly reduced.

The application belongs to the field of photoelectric functional materials, and discloses a blue light excitable Cu-based fluorescent material and a preparation method thereof. The material is obtained by room temperature reaction of 4-pytrz and halogenated cuprous CuX (X=Br, I), wherein 4-pytrz is 4-(4H-1,2,4-triazole-4-yl)pyridine. Two highly stable coordination polymers, complex 1 [CuBr(4-pytrz)2] n and complex 2 [Cu2I2(4-pytrz)] n are designed and synthesized, which have good thermal stability, exhibit a wide excitation band covering from deep ultraviolet light to blue light region, and have a quantum efficiency of 19.36% under blue light excitation. The complexes exhibit effective solid-state emission and enhanced light stability, and have wide application prospects.

The invention relates to the technical field of photoelectrocatalysis, in particular to a Mn (II) coordination polymer photoelectrode crystalline material and a preparation method and application thereof. The Mn (II) coordination polymer {[Mn2 (H2O) 6 (DODDA)]. 4H2O} n is obtained from an H4 (DODDA) organic ligand and manganese salt through a solvothermal method, an asymmetric unit comprises two Mn (II) ions in different coordination modes, adjacent Mn2 ions are bridged through carboxyl oxygen of the ligand to form straight chains, and two adjacent Mn2 straight chains are further bridged with Mn1 through the H4 (DODDA) ligand to form a transverse trapezoidal one-dimensional chain. A three-dimensional supramolecular structure is formed among the one-dimensional chains through the interaction of a large number of intermolecular hydrogen bonds. The Mn (II) coordination polymer shows better photoelectric property, has the potential of serving as a photoelectrode material, has good optical and electrical characteristics, can be used for constructing an efficient photoelectrocatalysis water decomposition system, and has application prospects in the aspects of photocatalytic hydrogen production, solar energy conversion and the like.

The invention discloses a zinc transition metal coordination polymer and a preparation method and application thereof, and relates to the technical field of metal-organic framework material photocatalysts, the chemical formula of the zinc transition metal coordination polymer is [Zn2 (L) 2 (byp)] n, and the zinc transition metal coordination polymer is prepared from 3, 3 '-(1, 2-phenyl dimethylene diether) dibenzoic acid ligand (H2L), 1, 2, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1 The polymer is prepared by co-dissolving 1, 5-bis (2-methyl-1-imidazolyl) pentane ligand (pyp) and Zn (Ac) 2.6 H2O in an aqueous solution, and the polymer has a wide prospect in application of photocatalytic degradation of antibiotics as a photocatalyst.

The application belongs to the technical field of nanometer material preparation, and discloses a regulation method for synthesizing copper coordination polymers with different dimensions. The method is to obtain copper coordination polymers with different dimensional morphologies under room temperature conditions by controlling the reaction sequence of copper ion solution, uniform benzenetricarboxylic acid and 4,4-dipyridine and the molar ratio of uniform benzenetricarboxylic acid and 4,4-dipyridine. The synthesis process is simple, the cost is low, the dimension of the morphology is adjustable, large-scale industrial production is possible, and good economic benefits and environmental benefits are achieved.

This invention provides a high-nickel ternary cathode material, its preparation method, and its applications. The high-nickel ternary cathode material comprises a composite core and a metal-organic coordination polymer coating layer on the surface of the composite core. The composite core includes a high-nickel ternary cathode material matrix and lanthanide metal phosphate particles dispersed in the matrix. The metal-organic coordination polymer in the coating layer is formed by the polymerization of nitrogen-containing organic ligands and their coordination with high-valence metal cations. This invention improves the bulk structural stability by pinning grain boundaries with lanthanide metal phosphates, while simultaneously providing interfacial protection using the metal-organic coordination polymer coating layer, effectively solving the problem of simultaneously achieving high cycle life and thermal stability in existing high-nickel ternary cathode materials.

A composition includes: a carrier matrix; a plurality of photoluminescent nanostructures distributed within the carrier matrix; a hindered amine stabilizer; and at least one of (i) an alkylalkoxysilane and a coordination polymer or (ii) a silanized coordination polymer.

The invention provides preparation and application of a metal complex mixed matrix membrane, and belongs to the fields of material science and gas separation. The preparation process comprises the following steps: preparing polyimide containing carboxyl functional groups; preparing a metal coordination polymer film; and preparing the metal complex mixed matrix membrane. The preparation method comprises the following steps: synthesizing a polyimide polymer containing a carboxyl functional group, coordinating the polyimide polymer with cobalt nitrate hexahydrate in a dissolved state to preliminarily form a metal coordinated polymer film, soaking the metal coordinated polymer film in a ligand solution formed by dissolving 2-methylimidazole in methanol, and carrying out vacuum drying to obtain the metal coordination polymer film. 2-methylimidazole molecules are brought into the membrane by utilizing the swelling effect of methanol on the membrane, and are subjected to coordination reaction with cobalt in a swelling space to form the metal complex mixed matrix membrane with ultrahigh selectivity, so that the separation performance and selectivity of the metal complex mixed matrix membrane on He / CH4 are improved.

The present invention discloses a variable-valence metal mercapto two-dimensional coordination polymer, its preparation method and application. The method comprises the following steps: S1. Mix an inorganic metal salt and 4,4'-thiobis(phenethyl alcohol) in a mixed solvent of an ionic liquid, an organic amine, N,N-dimethylformamide and isopropanol. After complete dissolution, carry out an ionothermal reaction; S2. Separate the mixture after the ionothermal reaction, and then wash and dry the separated solid phase with an alcohol until a pure-phase colored or colorless octahedral crystal is obtained, namely, a variable-valence metal mercapto two-dimensional coordination polymer is obtained; the variable-valence metal mercapto two-dimensional coordination polymer is an organic-inorganic hybrid compound, which is a colored or colorless octahedral crystal and can be applied to catalytic, electrical conductance, and photothermal conversion devices.

The application discloses a kind of light-assisted anticorrosion coating materials and preparation method based on metal coordination structure, the light-assisted anticorrosion coating material is on the basis of traditional anticorrosion metal zinc layer continue to be coordinated with the metal coordination polymer Co (bpy) (dhbq) (bq) with photoelectric conversion capability, and form coordination complex Co (bpy) (dhbq) (bq) @Zn.Because metal coordination polymer Co (bpy) (dhbq) (bq) itself can additionally generate photo-generated electron and photo-generated current after being illuminated, provide redundant charge for Zn layer, make it be in lower potential, strengthen the function of cathodic protection.Corrosion can be inhibited through this mechanism, prolong the service life of Zn layer, provide efficient, green anticorrosion protection for the steel material that needs to be protected.In addition, metal coordination light-assisted anticorrosion technology can also inhibit marine bioattachment by slowly releasing metal ions Co, prevent biofilm formation, reduce microbial growth, prolong the service life of protected material in marine environment, also applicable to underwater bioinduced corrosion and the protection of fouling metal structure.

The invention discloses a photo-assisted anti-corrosion coating material based on a metal coordination structure and a preparation method, the photo-assisted anti-corrosion coating material is continuously coordinated with a metal coordination polymer Co (bpy) (dhbq) (bq) with photoelectric conversion capability on the basis of a traditional anti-corrosion metal zinc layer to form a coordination compound Co (bpy) (dhbq) (bq) (at) Zn. Due to the fact that the metal coordination polymer Co (bpy) (dhbq) (bq) can additionally generate photo-generated electrons and photo-generated currents after being illuminated, redundant charges are provided for the Zn layer, the Zn layer is made to be in a low potential, and the cathode protection function is enhanced. Through the mechanism, corrosion can be inhibited, the service life of the Zn layer can be prolonged, and efficient and green anti-corrosion protection is provided for steel and iron materials needing to be protected. In addition, by slowly releasing metal ions Co, the metal coordination light-assisted anticorrosion technology can inhibit marine organism adhesion, prevent biofilm formation, reduce microbial growth and prolong the service life of a protected material in a marine environment, and is also suitable for underwater organism induced corrosion and protection of stained metal structures.

This invention relates to a method for producing organometallic coordination polymers and materials obtained using the provided method. The organometallic coordination polymer synthesized according to this method has a gel structure, characterized by an effective diameter of 0.75-0.80 nm and a specific area of ​​1300-1700 m². 2 / g, micropore volume of 0.5-0.6cm³ 3 The method yields nanopores per g and improved thermal stability. The synthesis method allows for reduced material consumption during the process by using a single solvent in both the synthesis and activation stages, thus shortening the production time of the polymer gel, which is characterized by active mesopores and micropores. This makes it suitable as a matrix in various absorption processes, including natural gas storage systems.

The invention discloses a metal organic optical waveguide material with lyochromism and application of the metal organic optical waveguide material in the field of information storage. The preparation method of the material comprises the following steps: mixing phthalonitrile and silver tetrafluoroborate according to a molar ratio of 0.005-70, then adding acetonitrile for ultrasonic dissolution, slowly volatilizing at room temperature, and obtaining the microcrystalline material after the solvent is volatilized. Placing the coordination polymer in a humid environment for 12 hours, wherein the structure of the coordination polymer is connected from a one-dimensional coordination polymer to a two-dimensional coordination polymer; then placing in an acetonitrile atmosphere for 20 hours to convert the structure from a two-dimensional coordination polymer to a one-dimensional coordination polymer; the structure conversion and color conversion cycle is reversible. According to the invention, not only is solvent-induced tunable photoluminescence realized, but also a color-tunable optical waveguide system is constructed, a miniature active optical waveguide system with high safety and high information density is developed by using the material, and the application of the material in the field of information storage is shown.

This invention provides a fluorescence-enhanced composite probe based on gold nanoclusters anchored on a zinc-based coordination polymer, its preparation method, and its application, belonging to the field of probe preparation technology. The method involves first mixing an aqueous solution of glutathione and an aqueous solution of tetrachlorohydrin to obtain a gold nanocluster solution; then adding adenine and water to a 4-(2-hydroxyethyl)-1-piperazine ethanesulfonic acid buffer solution and stirring until homogeneous, followed by the addition of a zinc chloride solution to obtain a zinc-based coordination polymer; finally, the gold nanocluster solution and the zinc-based coordination polymer solution are mixed homogeneously to obtain the fluorescence-enhanced composite probe based on gold nanoclusters anchored on the zinc-based coordination polymer. The probe of this invention can rapidly and sensitively recognize adenosine triphosphate (ATP). It can also be used to construct fluorescent hydrogels by mixing this material with κ-carrageenan; the hydrogels exhibit a sensitive response to ATP and good self-healing ability.

Compositions, methods and processes for producing an electrically conductive metal-organic material is disclosed, wherein the material is based on a coordination polymer consisting of a plurality of ligands and metal ions, each coordinated with a ligand to impart conductivity to the material. Further provided are methods of deposition and use to produce conductive textiles, stretchable, flexible and transparent devices and surfaces. The electrically conductive metal-organic material may be used in a variety of fields including wearable electronics, sensors (gas, wearable, sweat, temperature, humidity), batteries, supercapacitors, electronic and pressure sensitive textiles / cotton / paper, electromagnetic shielding fabric, triboelectric nanogenerators, conductive paints / inks, antistatic coatings, conductive spray for flexible, transparent, and pressure sensitive glass / elastomers / plastics.

The application belongs to the technical field of chemical industry, in particular to a novel glycerol hydrogenation catalyst and a preparation method thereof, which comprises the following steps: S1, dissolving benzene tetraamine tetrahydrochloride in deionized water, and stirring and dissolving to obtain a uniform solution; S2, dissolving a metal salt in deionized water, and adding the uniform solution obtained in S1 dropwise; S3, slowly adding ammonia water to the solution in S2, adjusting the pH to about 8, and stirring and reacting under room temperature conditions, and gradually producing dark precipitates in the solution; the application uses a kind of one-dimensional conjugated coordination polymer material as a glycerol hydrogenation catalyst, changes the type of metal ions, and obtains excellent glycerol hydrogenation reduction performance, realizes 99.99% of the conversion rate of glycerol and 97.10% of the selectivity of 1,2-propanediol under the conditions of 210 DEG C and 2.0 MPa; the one-dimensional conjugated coordination polymer material has simple preparation process, excellent catalytic performance, good long-term stability and commercial prospect.