CN117661024B - Electrolytic water ruthenium antimony catalyst and preparation method and application thereof - Google Patents
Electrolytic water ruthenium antimony catalyst and preparation method and application thereof Download PDFInfo
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- CN117661024B CN117661024B CN202410121695.2A CN202410121695A CN117661024B CN 117661024 B CN117661024 B CN 117661024B CN 202410121695 A CN202410121695 A CN 202410121695A CN 117661024 B CN117661024 B CN 117661024B
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- 239000003054 catalyst Substances 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- AXJJGGUECHRLTA-UHFFFAOYSA-N [Ru].[Sb] Chemical compound [Ru].[Sb] AXJJGGUECHRLTA-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 30
- 150000001462 antimony Chemical class 0.000 claims abstract description 25
- 150000003303 ruthenium Chemical class 0.000 claims abstract description 25
- 238000000137 annealing Methods 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000006185 dispersion Substances 0.000 claims abstract description 17
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- 238000007254 oxidation reaction Methods 0.000 claims abstract description 10
- 239000012298 atmosphere Substances 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 11
- 238000005868 electrolysis reaction Methods 0.000 claims description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 claims description 8
- DAMJCWMGELCIMI-UHFFFAOYSA-N benzyl n-(2-oxopyrrolidin-3-yl)carbamate Chemical compound C=1C=CC=CC=1COC(=O)NC1CCNC1=O DAMJCWMGELCIMI-UHFFFAOYSA-N 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- VMPVEPPRYRXYNP-UHFFFAOYSA-I antimony(5+);pentachloride Chemical compound Cl[Sb](Cl)(Cl)(Cl)Cl VMPVEPPRYRXYNP-UHFFFAOYSA-I 0.000 claims description 4
- 238000000861 blow drying Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- IYWJIYWFPADQAN-LNTINUHCSA-N (z)-4-hydroxypent-3-en-2-one;ruthenium Chemical compound [Ru].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O IYWJIYWFPADQAN-LNTINUHCSA-N 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 abstract description 8
- 230000003197 catalytic effect Effects 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002425 crystallisation Methods 0.000 abstract description 2
- 230000008025 crystallization Effects 0.000 abstract description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000012300 argon atmosphere Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 229910052707 ruthenium Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- BIXNGBXQRRXPLM-UHFFFAOYSA-K ruthenium(3+);trichloride;hydrate Chemical compound O.Cl[Ru](Cl)Cl BIXNGBXQRRXPLM-UHFFFAOYSA-K 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 101150101537 Olah gene Proteins 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- PNPBGYBHLCEVMK-UHFFFAOYSA-N benzylidene(dichloro)ruthenium;tricyclohexylphosphanium Chemical compound Cl[Ru](Cl)=CC1=CC=CC=C1.C1CCCCC1[PH+](C1CCCCC1)C1CCCCC1.C1CCCCC1[PH+](C1CCCCC1)C1CCCCC1 PNPBGYBHLCEVMK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- PHIQHXFUZVPYII-UHFFFAOYSA-N carnitine Chemical compound C[N+](C)(C)CC(O)CC([O-])=O PHIQHXFUZVPYII-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229910021397 glassy carbon Inorganic materials 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000011984 grubbs catalyst Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 238000004502 linear sweep voltammetry Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Catalysts (AREA)
Abstract
The invention belongs to the technical field of catalyst preparation, and provides an electrolytic water ruthenium-antimony catalyst, and a preparation method and application thereof. According to the preparation method, ruthenium salt, antimony salt and mesoporous carbon are dispersed in an organic solvent, and the obtained dispersion system is dried to obtain a powder system; and (3) annealing and oxidizing the powder system in sequence to obtain the electrolyzed water ruthenium-antimony catalyst. Mesoporous carbon can improve the conductivity of the catalyst, and annealing can enhance the crystallization property of a powder system to form more uniform and ordered particles; oxidation can activate the annealed product, modulating the electronic state of the catalytically active central ruthenium metal. The catalyst prepared by the invention has high catalytic activity. The preparation method of the invention uses ruthenium salt and antimony salt, and has low cost; simple flow, mild condition, larger and controllable productivity, and is beneficial to industrialization and practical application.
Description
Technical Field
The invention relates to the technical field of catalyst preparation, in particular to an electrolytic water ruthenium antimony catalyst, a preparation method and application thereof.
Background
Development of new energy materials and technologies that are clean and sustainable is always a struggle for humans. The hydrogen has small density, can be stored, has high energy density, and can not directly discharge pollutants or greenhouse gases in the preparation process, thus being an ideal choice. According to the research of the international energy agency, the demand of human beings for hydrogen is increased by more than three times since 1975, and the continuous and rapid growth trend is presented, the development of hydrogen is mostly from the conversion of limited non-renewable fossil fuel, and the development of water hydrogen production technology becomes the hot spot field of the current research, wherein the proton exchange membrane water electrolysis hydrogen production has the advantages of environmental protection, simple flow, high purity, high energy efficiency and the like, and is one of the most effective and feasible practical approaches. The principle and key of the electrolytic water reaction are hydrogen evolution reaction of the cathode and oxygen evolution reaction of the anode, wherein the kinetic rate of the anode reaction is far slower than that of the cathode, and the speed control step of the whole electrolytic water reaction is realized, so that higher overpotential is caused, and the energy consumption of the electrolytic water is far higher than a theoretical value. The high-efficiency anode catalyst can accelerate reaction kinetics, so that energy consumption is reduced. Therefore, how to develop an efficient proton exchange membrane water electrolysis anode catalyst is highly interesting and becomes a research hotspot and difficulty.
It is found that the proton exchange membrane electrolytic water anode reaction requires the catalyst to resist high potential corrosion under acidic conditions, and the common non-noble metals do not have the characteristic, so that people are forced to change the sunlight to the corrosion-resistant noble metals such as ruthenium, iridium, platinum and the like. Ruthenium has good catalytic potential and relatively low price in platinum group elements, and the ruthenium-based catalyst is widely applied to the fields of catalysis, new energy, carbon neutralization, biology, medicine and the like, such as the ruthenium-based Grubbs catalyst invented by Novain Robert H. The Nodek George A.olah team can directly convert carbon dioxide in air into methanol and the like by using a ruthenium-based catalyst.
At present, a commercial electrolytic water anode catalyst mostly adopts a high-load ruthenium dioxide catalyst and an iridium dioxide catalyst, wherein the commercial iridium dioxide catalyst has more stable property relative to the ruthenium dioxide, but has poorer catalytic activity and high price.
Disclosure of Invention
In view of the above, the invention aims to provide an electrolytic water ruthenium antimony catalyst, and a preparation method and application thereof. The ruthenium-antimony catalyst for electrolysis water prepared by the invention has high catalytic activity.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of an electrolytic water ruthenium antimony catalyst, which comprises the following steps:
Dispersing ruthenium salt, antimony salt and mesoporous carbon in an organic solvent, and drying the obtained dispersion system to obtain a powder system;
annealing and oxidizing the powder system in sequence to obtain the electrolyzed water ruthenium-antimony catalyst;
the ratio of the amounts of the ruthenium salt to the antimony salt is 1:1.8-1:2.2;
in the dispersion system, the total concentration of ruthenium salt and antimony salt is 10-50 g/L, and the concentration of mesoporous carbon is 10-100 g/L.
Preferably, the ruthenium salt comprises ruthenium trichloride and/or ruthenium acetylacetonate; the antimony salt comprises antimony trichloride and/or antimony pentachloride; the organic solvent includes an alcohol solvent.
Preferably, the drying mode is blow drying.
Preferably, the annealing temperature is 400-1000 ℃, the heating rate from the heating to the annealing temperature is 1-10 ℃/min, and the heat preservation time is 1-5 h; the annealing atmosphere is a protective gas.
Preferably, the temperature of the oxidation is 100-600 ℃, the heat preservation time is 1-5 h, and the oxidizing atmosphere is air.
The invention also provides the electrolytic water ruthenium-antimony catalyst prepared by the preparation method.
The invention also provides application of the water electrolysis ruthenium antimony catalyst in hydrogen production by water electrolysis.
The method of the invention comprises the steps of dispersing and drying ruthenium salt, antimony salt and mesoporous carbon, and carrying out annealing and oxidation on the obtained powder system to obtain the electrolytic water ruthenium-antimony catalyst. Mesoporous carbon can improve the conductivity of the catalyst, and annealing can enhance the crystallization property of a powder system to form more uniform and ordered particles; oxidation can activate the annealed product, modulating the electronic state of the catalytically active central ruthenium metal. The catalyst prepared by the invention has high catalytic activity. The preparation method of the invention uses ruthenium salt and antimony salt, and has low cost; simple flow, mild condition, larger and controllable productivity, and is beneficial to industrialization and practical application.
Drawings
FIG. 1 is a transmission electron microscope image of the ruthenium antimony catalyst for electrolyzed water obtained in example 1;
FIG. 2 is an X-ray diffraction chart of the ruthenium antimony catalyst for electrolysis of water obtained in example 1;
FIG. 3 is a graph showing the comparison of the electrocatalytic activity of the ruthenium antimony catalyst electrolyzed from examples 1 to 4 with a commercial ruthenium dioxide catalyst.
Detailed Description
The invention provides a preparation method of an electrolytic water ruthenium antimony catalyst, which comprises the following steps:
Dispersing ruthenium salt, antimony salt and mesoporous carbon in an organic solvent, and drying the obtained dispersion system to obtain a powder system;
annealing and oxidizing the powder system in sequence to obtain the electrolyzed water ruthenium-antimony catalyst;
the ratio of the amounts of the ruthenium salt to the antimony salt is 1:1.8-1:2.2;
in the dispersion system, the total concentration of ruthenium salt and antimony salt is 10-50 g/L, and the concentration of mesoporous carbon is 10-100 g/L.
In the present invention, the raw materials used in the present invention are preferably commercially available products unless otherwise specified.
The invention disperses ruthenium salt, antimony salt and mesoporous carbon in an organic solvent, and the obtained dispersion system is dried to obtain a powder system.
In the present invention, the ratio of the amounts of the substances of the ruthenium salt and the antimony salt is preferably 1:2.
In the present invention, the ruthenium salt preferably includes ruthenium trichloride and/or ruthenium acetylacetonate, further preferably includes ruthenium trichloride, and the ruthenium trichloride preferably includes ruthenium trichloride hydrate. In the present invention, the antimony salt preferably includes antimony trichloride and/or antimony pentachloride, and more preferably antimony trichloride. In the invention, the particle size of the mesoporous carbon is preferably 60-200 nm, and the pore diameter is preferably 20-40 nm. In the present invention, the organic solvent preferably includes an alcohol solvent, and more preferably includes methanol and/or ethanol.
In the present invention, the dispersing of ruthenium salt, antimony salt and mesoporous carbon in an organic solvent preferably comprises: ruthenium salt and antimony salt were dispersed in an organic solvent, and then mesoporous carbon was added.
In the invention, the total concentration of the ruthenium salt and the antimony salt in the dispersion system is preferably 10-40 g/L, more preferably 10-30 g/L, and most preferably 20-30 g/L; the concentration of mesoporous carbon is preferably 20 to 80 g/L, more preferably 30 to 70 g/L, and most preferably 40 to 60 g/L.
In the present invention, the drying mode is preferably blow drying. In the present invention, the blow-drying atmosphere is preferably an inert gas, and more preferably argon.
After the powder system is obtained, the powder system is annealed and oxidized in sequence, and the electrolytic water ruthenium antimony catalyst is obtained.
In the invention, the annealing temperature is preferably 400-1000 ℃, more preferably 500-900 ℃, still more preferably 600-900 ℃, and most preferably 800-900 ℃; the heating rate of the annealing temperature is preferably 1-10 ℃/min, more preferably 3-10 ℃/min, and even more preferably 5-7 ℃/min; the heat preservation time is preferably 1-5 hours, more preferably 1-4 hours, more preferably 2-4 hours, and most preferably 3-4 hours; the atmosphere of the annealing is preferably a shielding gas, and the shielding gas is preferably argon or nitrogen. After the annealing, the invention preferably further comprises natural cooling to room temperature, and the natural cooling is preferably carried out under the annealing atmosphere.
In the present invention, the annealing can enhance the crystalline nature of the powder system, forming more uniform and ordered particles.
In the invention, the temperature of the oxidation is preferably 100-600 ℃, more preferably 150-550 ℃, more preferably 200-500 ℃, and most preferably 300-400 ℃; the heat preservation time is preferably 1-5 hours, more preferably 1-4 hours, more preferably 2-4 hours, and most preferably 3-4 hours; the oxidizing atmosphere is preferably air. After the oxidation, the present invention preferably further includes natural cooling to room temperature, which is preferably performed under an oxidizing atmosphere.
In the present invention, the oxidation can activate the annealed product, modulating the electronic state of the catalytically active central ruthenium metal in the final catalyst.
The invention also provides the electrolytic water ruthenium-antimony catalyst prepared by the preparation method. In the present invention, the electrolytic water ruthenium antimony catalyst comprises an amorphous oxide.
The invention also provides application of the water electrolysis ruthenium antimony catalyst in hydrogen production by water electrolysis.
The application mode of the electrolytic water ruthenium antimony catalyst is not particularly limited, and the electrolytic water ruthenium antimony catalyst can be prepared by operations well known to those skilled in the art.
The electrolytic water ruthenium antimony catalyst, the preparation method and application thereof provided by the invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the invention.
Example 1
(A) Mixing ruthenium trichloride and antimony trichloride according to the mass ratio of 1:2.1, and preparing a solution with the total concentration of ruthenium salt and antimony salt of 20 g/L by using ethanol; then adding mesoporous carbon, and uniformly mixing, wherein the concentration of the mesoporous carbon powder is 60 g/L, so as to obtain a dispersion system.
(B) And (3) blowing and drying the dispersion system obtained in the step (A) in an argon atmosphere to obtain a powder system.
(C) And (3) annealing the powder system obtained in the step (B) for 3 hours at 800 ℃ in an argon atmosphere, wherein the heating rate is 5 ℃/min, and naturally cooling to room temperature in the argon atmosphere.
(D) And (3) oxidizing the annealed Product obtained in the step (C) at 400 ℃ in an air atmosphere for 2h, and naturally cooling to room temperature in the air atmosphere to obtain the electrolyzed water ruthenium antimony catalyst, which is named as Product 1.
The transmission electron microscope image of the obtained electrolytic water ruthenium antimony catalyst is shown in fig. 1, and as can be seen from fig. 1, the product prepared through the steps is nano-particles, and the average size is about 10 nm.
As shown in FIG. 2, the X-ray diffraction pattern of the obtained electrolytic water ruthenium antimony catalyst is shown in FIG. 2, and in the X-ray diffraction pattern of the prepared nano particles, large bulge peaks appear at the 2-theta diffraction angles of 20-40 degrees and 45-60 degrees, and the peaks are obviously different from sharp diffraction peaks of RuSb 2 crystal standard diffraction cards (PDF#97-004-3652 RuSb2), so that the sample is proved to be of an amorphous structure.
Example 2
(A) Mixing ruthenium trichloride hydrate and antimony trichloride according to the mass ratio of 1:2, preparing a solution with the total concentration of ruthenium salt and antimony salt of 10 g/L by using ethanol, and then adding mesoporous carbon powder, and uniformly mixing, wherein the concentration of the mesoporous carbon powder is 50 g/L, so as to obtain a dispersion system.
(B) And (3) blowing and drying the dispersion system obtained in the step (A) in a nitrogen atmosphere to obtain a powder system.
(C) And (3) annealing the powder system obtained in the step (B) in a nitrogen atmosphere at 500 ℃ for 4 h, wherein the heating rate is 8 ℃/min, and naturally cooling to room temperature in the nitrogen atmosphere.
(D) And (3) oxidizing the annealed Product obtained in the step (C) at 500 ℃ in an air atmosphere for 2h, and naturally cooling to room temperature in the air atmosphere to obtain the electrolyzed water ruthenium antimony catalyst, which is named as Product 2.
Example 3
(A) Mixing ruthenium trichloride and antimony pentachloride according to the mass ratio of 1:1.8, preparing a solution with the total concentration of ruthenium salt and antimony salt of 30 g/L by using methanol, and then adding mesoporous carbon powder, and uniformly mixing, wherein the concentration of the mesoporous carbon powder is 50 g/L, so as to obtain a dispersion system.
(B) And (3) blowing and drying the dispersion system obtained in the step (A) in a nitrogen atmosphere to obtain a powder system.
(C) And (3) annealing the powder system obtained in the step (B) at 900 ℃ in an argon atmosphere for 5h, wherein the heating rate is 10 ℃/min, and naturally cooling to room temperature in the argon atmosphere.
(D) And (3) oxidizing the annealed Product obtained in the step (C) at 300 ℃ in an air atmosphere to 3 h, and naturally cooling to room temperature in the air atmosphere to obtain the electrolyzed water ruthenium antimony catalyst, which is named as Product 3.
Example 4
(A) Mixing ruthenium trichloride and antimony trichloride according to the mass ratio of 1:1.8, preparing a solution with the total concentration of ruthenium salt and antimony salt of 25 g/L by using ethanol, and then adding mesoporous carbon powder, and uniformly mixing, wherein the concentration of the mesoporous carbon powder is 70 g/L, so as to obtain a dispersion system.
(B) And (3) blowing and drying the dispersion system obtained in the step (A) in an argon atmosphere to obtain a powder system.
(C) And (3) annealing the powder system obtained in the step (B) at 800 ℃ in an argon atmosphere for 4 h, wherein the heating rate is 10 ℃/min, and naturally cooling to room temperature in the argon atmosphere.
(D) And (3) oxidizing the annealed Product obtained in the step (C) at 400 ℃ in an air atmosphere for 2h, and naturally cooling to room temperature in the air atmosphere to obtain the electrolyzed water ruthenium antimony catalyst, which is named as Product 4.
Electrocatalytic activity test
Electrochemical workstation testing using a standard three electrode system was carried out. The testing method comprises the following steps: the scanning speed of the linear sweep voltammetry is 5 mV/s. The electrolyte is 0.1 mol/L perchloric acid, the reference electrode is a silver chloride electrode, and the auxiliary electrode is a platinum wire electrode. The catalyst coated glassy carbon electrode was used as the working electrode.
FIG. 3 is a graph comparing the electrocatalytic activity of the ruthenium antimony catalyst electrolyzed from examples 1-4 with a commercial ruthenium dioxide catalyst (available from Umicore (Methacew)), using a Reversible Hydrogen Electrode (RHE) as a uniform zero potential point and performing iR compensation. As can be seen from FIG. 3, the potentials required for the inventive examples 1-4 were all lower than that of the commercial ruthenium dioxide catalyst when the same current density was reached, indicating that the catalytic activity of the inventive samples was superior to that of the commercial ruthenium dioxide catalyst.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. The preparation method of the electrolytic water ruthenium antimony catalyst is characterized by comprising the following steps of:
Dispersing ruthenium salt, antimony salt and mesoporous carbon in an organic solvent, and drying the obtained dispersion system to obtain a powder system;
annealing and oxidizing the powder system in sequence to obtain the electrolyzed water ruthenium-antimony catalyst;
the ratio of the amounts of the ruthenium salt to the antimony salt is 1:1.8-1:2.2;
in the dispersion system, the total concentration of ruthenium salt and antimony salt is 10-50 g/L, and the concentration of mesoporous carbon is 10-100 g/L;
The annealing temperature is 400-1000 ℃, the heating rate from the temperature rise to the annealing temperature is 1-10 ℃/min, and the annealing heat preservation time is 1-5 h; the annealing atmosphere is a protective gas;
The temperature of the oxidation is 100-600 ℃, the heat preservation time of the oxidation is 1-5 h, and the atmosphere of the oxidation is air.
2. The preparation method according to claim 1, wherein the ruthenium salt comprises ruthenium trichloride and/or ruthenium acetylacetonate; the antimony salt comprises antimony trichloride and/or antimony pentachloride; the organic solvent includes an alcohol solvent.
3. The method of claim 1, wherein the drying is blow-drying.
4. The ruthenium antimony catalyst for electrolysis water prepared by the preparation method according to any one of claims 1 to 3.
5. The use of the ruthenium-antimony catalyst for water electrolysis in the hydrogen production by water electrolysis according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410121695.2A CN117661024B (en) | 2024-01-30 | 2024-01-30 | Electrolytic water ruthenium antimony catalyst and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410121695.2A CN117661024B (en) | 2024-01-30 | 2024-01-30 | Electrolytic water ruthenium antimony catalyst and preparation method and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117661024A CN117661024A (en) | 2024-03-08 |
| CN117661024B true CN117661024B (en) | 2024-05-07 |
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