CN110732337A - Preparation method of Co-MOF-derived Co/N-CNW composite materials - Google Patents
Preparation method of Co-MOF-derived Co/N-CNW composite materials Download PDFInfo
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- CN110732337A CN110732337A CN201910975584.7A CN201910975584A CN110732337A CN 110732337 A CN110732337 A CN 110732337A CN 201910975584 A CN201910975584 A CN 201910975584A CN 110732337 A CN110732337 A CN 110732337A
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- 239000012921 cobalt-based metal-organic framework Substances 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000000197 pyrolysis Methods 0.000 claims abstract description 12
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 14
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000002243 precursor Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000013110 organic ligand Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- ZBYYWKJVSFHYJL-UHFFFAOYSA-L cobalt(2+);diacetate;tetrahydrate Chemical compound O.O.O.O.[Co+2].CC([O-])=O.CC([O-])=O ZBYYWKJVSFHYJL-UHFFFAOYSA-L 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 229940011182 cobalt acetate Drugs 0.000 claims description 2
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000002070 nanowire Substances 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000012621 metal-organic framework Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001588 bifunctional effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/2208—Oxygen, e.g. acetylacetonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/33—Electric or magnetic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/02—Compositional aspects of complexes used, e.g. polynuclearity
- B01J2531/0213—Complexes without C-metal linkages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/10—Complexes comprising metals of Group I (IA or IB) as the central metal
- B01J2531/16—Copper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
The invention belongs to the field of material synthesis, and particularly relates to a preparation method of Co-MOF-derived Co/N-C NW composite materials, which comprises the following steps of preparing the Co-MOF composite materials by a hydrothermal method, and preparing a Co/nitrogen-carbon nanowire (Co/N-C NW) composite material by a pyrolysis method.
Description
Technical Field
The invention relates to a preparation method of Co-MOF-derived Co/nitrogen-carbon nanowire (Co/N-C NW) electrode materials, belonging to the field of material synthesis.
Background
In recent years, a Metal Organic Framework (MOF) having porosity as a complex has become a new material research field, and the material has a large specific surface area, a uniform structure and a tunable composition structure. The metal ions act as catalytically active centers throughout the metal organic framework precursor material, while the majority of the organic ligands act as microchannel frameworks throughout the MOF material, these properties being caused by their variable metal centers and organic ligands. For the selection of metal centers of MOF materials, transition metals have become a focus of research, especially metals such as Co, Cu, etc. The metal ions of the organic ligands have many active centers, which promote the propagation and diffusion of multiple channels during reaction and interaction. Meanwhile, the framework of the MOF has a redundant active site structure, so that a proper place is provided for synthesizing an electrocatalyst material with excellent performance.
Recently, on the basis of a precursor, corresponding derivatives with excellent performance are developed on the basis of intensive research of a plurality of researchers, for example, Ni/Mo2C-NCNFs composite materials are used as a bifunctional catalyst for catalyzing hydrogen evolution reaction and oxygen evolution reaction simultaneously, the overpotentials of HER and OER are only 143mV and 288mV when the current density reaches 10mA cm < -2 >, and the overpotentials of Cr-coped-FeNi-P/NCN electrocatalytic water decomposition bifunctional catalyst are 190 mV and 240 mV. when the current density reaches 10mA cm < -2 > because the nanomaterials have excellent performances, such as larger pore channel structures, higher surface areas and the like, so that is widely applied in the fields of energy storage conversion, sensors, catalysis and the like, and the application prospect of is broad.
Disclosure of Invention
The invention provides simple strategies for preparing non-noble metal composite materials by , namely, various types of non-noble metal composite materials derived from precursors by controlling post-treatment conditions of the precursors, aiming at developing the possibility and the potential of the materials in certain fields to the maximum extent on the basis of sustainable development.
(1) Accurately measuring N, N-Dimethylformamide (DMF), ethanol and deionized water in a 100mL beaker in a certain proportion, weighing quantitative terephthalic acid (H2 BDC) after uniformly mixing, adding equal amount of cobalt acetate (C4H6CoO4.4H2O) after uniformly mixing by ultrasound, and transferring to a hydrothermal kettle with a polytetrafluoroethylene lining;
(2) placing the hydrothermal kettle in an oven for reaction, cooling to room temperature, taking out, centrifuging the reaction product, drying the obtained solid in a constant-temperature oven, and grinding uniformly to obtain a Co-MOF product;
(3) quantitative Co-MOF precursor prepared in the above way is taken and put into a small square crucible and a tube furnace for pyrolysis, nitrogen is introduced in advance for half an hour before pyrolysis, and then the power is switched on to start pyrolysis reaction.
, the volume ratio of DMF, ethanol and deionized water in the step (1) is (1-16): (0-4): 0-4), and the molar ratio of the organic ligand terephthalic acid and cobalt acetate tetrahydrate is 1: (1-4).
, the hydrothermal reaction temperature of the solution in the step (2) is 120-180 ℃, and the reaction time is 12-48 hours.
, cooling the hydrothermal reaction kettle in the step (2) to room temperature for 8-10 hours, and drying in a constant-temperature oven at 60 ℃ for 4-6 hours.
And () keeping the pyrolysis temperature of 600-800 ℃ in the step (3) for 2 hours, naturally cooling the sample for 2-3 hours after the pyrolysis is finished, taking out the sample, and grinding the sample into powder by using an agate mortar to prepare the Co/N-C NW (600-800 ℃).
The invention has the beneficial effects that:
the method for preparing the Co/N-C NW composite material is simple, convenient and novel, and has wide application prospect in the field of composite materials.
Drawings
The invention is further described with reference to the following drawings:
FIG. 1 is a comparison XRD plot of Co-MOF and Co/N-C NW composites from example 1;
FIG. 2 is a graph comparing FTIR for Co-MOF and Co/N-C NW composites of example 1.
Detailed Description
The invention will now be further illustrated by in conjunction with specific examples which are intended to illustrate the invention but not to limit the invention to .
Example 1:
the preparation method of the composite electrode material comprises the following steps:
(1) accurately measuring 32mL of DMF (N, N-dimethylformamide), 2mL of ethanol and 2mL of deionized water, uniformly mixing in a 100mL beaker, then weighing 0.75mmol of terephthalic acid, then adding 0.75mmol of cobalt acetate tetrahydrate after ultrasonic dissolution, and transferring to a hydrothermal kettle;
(2) placing the hydrothermal kettle in an oven at 140 ℃ for reaction for 24 hours, cooling the hydrothermal kettle to room temperature, taking out the hydrothermal kettle, pouring out a product, performing centrifugal treatment for 2-3 times, transferring a bottom solid in a centrifugal tube to a watch glass, placing the watch glass in a constant-temperature oven at 60 ℃ for drying for 6 hours, cooling the watch glass to room temperature, and grinding the watch glass to obtain Co-MOF;
(3) A certain amount of Co-MOF precursor prepared as described above was put into a small square crucible washed with deionized water and spread flat, the small square crucible was put into the furnace body of a tube furnace by a tool, the inlet valve and the outlet valve of the tube furnace were opened, the nitrogen valve was opened and the gas flow rate was adjusted, the air was vented for half an hour in advance, then the power was turned on while pushing the air switch on the left side of the furnace body, the instrument was started to operate, the temperature was raised to 700 ℃ at a temperature raising rate of 10 ℃ min-1 under an inert nitrogen atmosphere in the tube furnace and kept for 2 hours, after that, the sample was taken out after natural cooling, the crucible was ground into powder with an agate mortar to obtain Co/N-C NW (700 ℃ C.) other temperature composites prepared in the same manner except that the temperature was set different, FIG. 1 is Co-MOF and Co/N-C NW composites XRD contrast map, wherein the diffraction peaks of Co-MOF and Co/N-C NW show completely different diffraction peaks corresponding to the values of the literature, and the peaks of Co-MOF-N-C NW composites obtained after pyrolysis under inert nitrogen atmosphere in the inert gas atmosphere in FIG. 1, the map, the graph shows that the peaks of the diffraction peaks of the comparative graph of the diffraction peaks of the stretching of the Co-MOF-NW prepared Co-MOF and the stretching of the publication Co-MOF-N-NW prepared Co-C-NW, the publication Co-MOF-C transition metal, the publication Co-CO 2, the neighborhood of.
Claims (5)
- A method for the preparation of Co-MOF derived Co/N-C NW composites, characterized by the following main steps:(1) accurately measuring N, N-Dimethylformamide (DMF), ethanol and deionized water in a 100mL beaker in a certain proportion, weighing quantitative terephthalic acid (H2 BDC) after uniformly mixing, adding equal amount of cobalt acetate (C4H6CoO4.4H2O) after uniformly mixing by ultrasound, and transferring to a hydrothermal kettle with a polytetrafluoroethylene lining;(2) placing the hydrothermal kettle in an oven for reaction, cooling to room temperature, taking out, centrifuging the reaction product, drying the obtained solid in a constant-temperature oven, and grinding uniformly to obtain a Co-MOF product;(3) quantitative Co-MOF precursor prepared in the above way is taken and put into a small square crucible and placed into a tube furnace for pyrolysis, nitrogen is introduced into the tube furnace for half an hour before pyrolysis, and then the power is switched on to start pyrolysis reaction.
- 2. The preparation method according to claim 1, wherein the volume ratio of DMF, ethanol and deionized water in step (1) is (1-16): (0-4): (0-4); the molar ratio of the organic ligand terephthalic acid to the tetrahydrate cobalt acetate is 1: (1-4).
- 3. The preparation method according to claim 1, wherein the hydrothermal reaction temperature of the solution in the step (2) is 120-180 ℃; the reaction time is 12-48 hours.
- 4. The preparation method according to claim 1, wherein the time for cooling the hydrothermal reaction kettle to room temperature in the step (2) is 8-10 hours; the drying time in the constant-temperature oven at 60 ℃ is 4-6 hours.
- 5. The preparation method according to claim 1, wherein the pyrolysis temperature in step (3) is 600-800 ℃ and is kept for 2 hours, after the pyrolysis temperature is over, the sample is naturally cooled and taken out for 2-3 hours, and the cooled sample is ground into powder by using an agate mortar, so that the Co/N-C NW (600-800 ℃) composite material is prepared.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944141A (en) * | 2017-04-18 | 2017-07-14 | 扬州大学 | The preparation method of sheet Co MOF nano materials and its application in electro-catalysis |
| CN108435177A (en) * | 2018-03-26 | 2018-08-24 | 青岛科技大学 | A kind of porous carbon coating nano metal cobalt composite catalyst and its preparation and application |
| CN109233740A (en) * | 2018-08-02 | 2019-01-18 | 南京理工大学 | The method for preparing Fe/Co/C composite wave-suction material based on modified MOF materials pyrolysis |
| CN109908940A (en) * | 2019-04-02 | 2019-06-21 | 大连理工大学 | A kind of M@CN composite catalyzing material of N doping porous carbon carried metal, preparation method and application |
| CN110038643A (en) * | 2019-04-26 | 2019-07-23 | 常州大学 | A kind of oxygen-separating catalyst of the Ni/N-C NW material derived by MOF |
-
2019
- 2019-10-15 CN CN201910975584.7A patent/CN110732337A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944141A (en) * | 2017-04-18 | 2017-07-14 | 扬州大学 | The preparation method of sheet Co MOF nano materials and its application in electro-catalysis |
| CN108435177A (en) * | 2018-03-26 | 2018-08-24 | 青岛科技大学 | A kind of porous carbon coating nano metal cobalt composite catalyst and its preparation and application |
| CN109233740A (en) * | 2018-08-02 | 2019-01-18 | 南京理工大学 | The method for preparing Fe/Co/C composite wave-suction material based on modified MOF materials pyrolysis |
| CN109908940A (en) * | 2019-04-02 | 2019-06-21 | 大连理工大学 | A kind of M@CN composite catalyzing material of N doping porous carbon carried metal, preparation method and application |
| CN110038643A (en) * | 2019-04-26 | 2019-07-23 | 常州大学 | A kind of oxygen-separating catalyst of the Ni/N-C NW material derived by MOF |
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Application publication date: 20200131 |