CN-121992446-A - Carbon nano-ruthenium-nickel composite catalytic material and preparation method and application thereof

Abstract

The invention discloses a nano carbon-ruthenium-nickel composite catalytic material, a preparation method and application thereof, which belong to the technical field of catalytic materials, wherein the preparation method of the nano carbon-ruthenium-nickel composite catalytic material comprises the following steps of adding ruthenium salt into a solvent, and uniformly mixing to obtain a solution A; adding nickel salt into a solvent, uniformly mixing to obtain a solution B, adding organic acid into the solvent, uniformly mixing to obtain a solution C, adding nano carbon into the solvent to disperse to obtain a mixed solution D, synchronously dripping the solution A, the solution B and the solution C into the mixed solution D under the condition of continuous stirring to react to obtain a mixed solution E, centrifuging the mixed solution E to obtain a precursor F, and washing and vacuum drying the precursor F to obtain the nano carbon-ruthenium nickel composite catalytic material. According to the invention, by utilizing the anchoring sites and the porous structure on the surface of the nano carbon carrier, the anchoring sites with space limiting effect are provided for ruthenium and nickel metal precursors.

Inventors

• MA MINGXING
• DU JIYUAN
• LI HUI
• WANG SHUO

Assignees

• 研奥电气股份有限公司
• 长春研奥催化材料有限公司

Dates

Publication Date

20260508

Application Date

20260410

Claims (10)

1. 1. The preparation method of the nano carbon-ruthenium-nickel composite catalytic material is characterized by comprising the following steps of: adding ruthenium salt into a solvent, and uniformly mixing to obtain a solution A; Adding nickel salt into a solvent, and uniformly mixing to obtain a solution B; adding organic acid into the solvent, and uniformly mixing to obtain a solution C; adding nano carbon into a solvent for dispersion to obtain a mixed solution D; Under the condition of continuous stirring, synchronously dripping the solution A, the solution B and the solution C into the mixed solution D for reaction to obtain a mixed solution E; centrifuging the mixed solution E to obtain a precursor F; And cleaning the precursor F, and drying in vacuum to obtain the nano carbon-ruthenium-nickel composite catalytic material.
2. 2. The preparation method of the nano carbon-ruthenium-nickel composite catalytic material according to claim 1, wherein the solvent is an organic solvent or a mixed solution of water and an organic solvent, and the organic solvent is dichloromethane and/or ethylene glycol.
3. 3. The preparation method of the nano carbon-ruthenium-nickel composite catalytic material according to claim 1 is characterized in that the concentration of ruthenium salt in the solution A is 17-107mg/mL, the concentration of nickel salt in the solution B is 105-500mg/mL, the concentration of organic acid in the solution C is 50-150mg/mL, and the concentration of nano carbon in the mixed solution D is 10-100mg/mL.
4. 4. The method for preparing the nano carbon-ruthenium-nickel composite catalytic material according to claim 3, wherein the volume ratio of the solution A to the solution B to the solution C to the mixed solution D is (1-5): 1-2-3.
5. 5. The method for preparing the nano-carbon-ruthenium-nickel composite catalytic material according to claim 1, wherein the ruthenium salt is one or more of ruthenium trichloride, ruthenium acetate and ruthenium nitrate.
6. 6. The method for preparing the nano-carbon-ruthenium-nickel composite catalytic material according to claim 1, wherein the nickel salt is one or more of nickel chloride, nickel nitrate and nickel acetate.
7. 7. The method for preparing the nano carbon-ruthenium-nickel composite catalytic material according to claim 1, wherein the organic acid is one or more of citric acid, ascorbic acid and formic acid.
8. 8. The method for preparing the nano carbon-ruthenium nickel composite catalytic material according to claim 1, wherein the nano carbon is powder or substrate supported and comprises one or more of graphene and carbon nanotubes.
9. 9. A nanocarbon-ruthenium-nickel composite catalytic material prepared by the preparation method of any one of claims 1 to 8.
10. 10. Use of the nanocarbon-ruthenium-nickel composite catalytic material according to claim 9 in the production of hydrogen by electrolysis of water.

Description

Carbon nano-ruthenium-nickel composite catalytic material and preparation method and application thereof Technical Field The invention relates to the technical field of catalytic materials, in particular to a nano carbon-ruthenium-nickel composite catalytic material, a preparation method and application thereof. Background The current catalytic materials for preparing hydrogen from main stream seawater are divided into three types, namely a noble metal monoatomic catalyst (such as Pt and Ru monoatoms), a nano carbon-based carrier catalyst (such as graphene loaded type) which has high conductivity and specific surface area, weak interaction between a carrier and metal active sites, easy metal shedding and insufficient seawater ion pollution resistance, wherein the number of single active sites is limited, the activity attenuation is easily caused by oxidation of Cl - or atom aggregation in seawater, the noble metal usage amount is high, the cost is low, the HER activity is far inferior to that of noble metal, the activity is easily corroded in alkaline or high-salt seawater environment, and the long-term stability is poor. The bimetallic catalyst becomes a research hot spot in recent years due to the 'double active site synergistic effect', and the catalytic performance can be improved through the regulation and control of two metal atomic electron effects, but the existing products are mostly designed aiming at fresh water hydrogen production, the problems of corrosion and ion interference in the seawater environment are not solved, and the preparation process is complex (such as high-temperature pyrolysis and atomic layer deposition) and difficult to apply in a large scale. Therefore, development of the nano carbon-based bimetallic catalyst with high catalytic activity, strong corrosion resistance and low noble metal dosage becomes a key for breaking through the technical bottleneck. Disclosure of Invention The invention aims to provide a preparation method of a nano carbon-ruthenium-nickel composite catalytic material, which aims to solve the problems in the background technology. In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the preparation method of the nano carbon-ruthenium-nickel composite catalytic material comprises the following steps: adding ruthenium salt into a solvent, and uniformly mixing to obtain a solution A; Adding nickel salt into a solvent, and uniformly mixing to obtain a solution B; adding organic acid into the solvent, and uniformly mixing to obtain a solution C; adding nano carbon into a solvent for dispersion to obtain a mixed solution D; Under the condition of continuous stirring, synchronously dripping the solution A, the solution B and the solution C into the mixed solution D for reaction to obtain a mixed solution E; centrifuging the mixed solution E to obtain a precursor F; And cleaning the precursor F, and drying in vacuum to obtain the nano carbon-ruthenium-nickel composite catalytic material. Further, the solvent is an organic solvent or a mixed solution of water and the organic solvent, and the organic solvent is dichloromethane and/or ethylene glycol. Further, the concentration of ruthenium salt in the solution A is 17-107mg/mL, the concentration of nickel salt in the solution B is 105-500mg/mL, the concentration of organic acid in the solution C is 50-150mg/mL, and the concentration of nano carbon in the mixed solution D is 10-100mg/mL. Further, the volume ratio of the solution A to the solution B to the solution C to the mixed solution D is (1-5): 1-2: 2-3. Further, the ruthenium salt is one or more of ruthenium trichloride, ruthenium acetate and ruthenium nitrate. Further, the nickel salt is one or more of nickel chloride, nickel nitrate and nickel acetate. Further, the organic acid is one or more of citric acid, ascorbic acid and formic acid. Further, the nano carbon is powder or substrate supported, and comprises one or more of graphene and carbon nano tubes. Another object of the embodiment of the invention is to provide a nano carbon-ruthenium-nickel composite catalytic material prepared by the preparation method. Another object of the embodiment of the invention is to provide an application of the nano carbon-ruthenium-nickel composite catalytic material in hydrogen production by water electrolysis. According to the preparation method of the nano carbon-ruthenium-nickel composite catalytic material, the anchoring sites with the space limiting effect are provided for two metal precursors of ruthenium and nickel by utilizing the anchoring sites and the porous structure on the surface of the nano carbon carrier. In this unique support environment, ruthenium and nickel atoms are capable of undergoing directional co-reduction and co-nucleation to form bimetallic clusters with specific coordination structures. The preparation method effectively solves the technical problems of uneven distribution