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Ru/Y(OH)3 hybrid nanostructure as well as preparation method and application thereof

A nanostructured and hybrid technology is applied in the field of electrochemistry to achieve the effects of strong repeatability, simple and easy preparation method and good electrocatalytic activity

Inactive Publication Date: 2019-02-26
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, yttrium-based materials are mostly used in the fields of optics, superconductivity and sensing, and there are few reports in the field of electrochemistry.

Method used

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  • Ru/Y(OH)3 hybrid nanostructure as well as preparation method and application thereof
  • Ru/Y(OH)3 hybrid nanostructure as well as preparation method and application thereof
  • Ru/Y(OH)3 hybrid nanostructure as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of Ru nanoparticles

[0042] In a 50 mL three-necked flask, add 220 mg PVP, 360 mg CTAB, and 10 mL RuCl with a concentration of 0.16 mmol / L in sequence. 3 solution, ultrasonically mixed evenly; the oil bath was heated to 110 o C, Slowly add NaBH dropwise under magnetic stirring 4 Solution (0.53mol / L, 10 mL), 110 o C was kept at reflux for 2 h; naturally cooled to room temperature, washed with a mixed solution of ethanol and water (volume ratio 1:1), centrifuged and dried to obtain the product Ru nanoparticles.

[0043] attached figure 1 It is the EDS map of the product, which characterizes the elemental composition of the product. Among them, the Cu element and the C element come from the copper network of the carbon support film, the O element comes from the capping reagent and air adsorbed on the surface of the product, and the Ru element is the composition of the product.

[0044] attached figure 2 It is the TEM image of the product, indicating tha...

Embodiment 2

[0047] flocculent Y(OH) 3 preparation of

[0048]In a 50 mL three-necked flask, 61.3 mg Y(NO 3 )·6H 2 O, 220 mg PVP, 360 mg CTAB, 10 mL ultrapure water, ultrasonically mix well. Heat the oil bath to 110 o C, Slowly add NaBH dropwise under magnetic stirring 4 Solution (0.53mol / L, 10 mL), 110 o C heat preservation and reflux for 2 h. Naturally cooled to room temperature, washed with a mixed solution of ethanol and water (volume ratio 1:1), centrifuged and dried to obtain flocculent Y(OH) 3 product.

[0049] attached Figure 4 It is the EDS map of the product, which characterizes the elemental composition of the product. Among them, the main components of the product are Y and O, and the elements Cu and C are derived from the copper mesh of the carbon support film.

[0050] attached Figure 5 It is the TEM image of the product, indicating that the product is a flocculent morphology.

[0051] attached Image 6 It is the XRD pattern of the product, and there is no obvi...

Embodiment 3

[0054] Ru / Y(OH) 3 Preparation of hybrid nanostructures

[0055] In a 50mL three-necked flask, add 61.3 mg Y(NO 3 )·6H 2 O, 220 mg PVP, 360 mg CTAB, 10 mL of RuCl at a concentration of 0.16 mmol / L 3 solution, ultrasonically mixed. Heat the oil bath to 110 o C, Slowly add NaBH dropwise under magnetic stirring 4 Solution (0.53 mol / L, 10 mL), 110 o C heat preservation and reflux for 2 h. Naturally cooled to room temperature, washed with a mixed solution of ethanol and water (volume ratio 1:1), centrifuged and dried to obtain Ru / Y(OH) 3 product.

[0056] attached Figure 8 It is the SEM image of the product. It can be seen from the figure that the product is a structure in which highly dispersed nanoparticles are evenly modified on the flocculent substrate, and the diameter of the nanoparticles is 1.5-3.5nm.

[0057] attached Figure 9 is the HRTEM image of the product, where the lattice fringe spacing of 0.23 nm corresponds to the (100) crystal plane of the hexagonal ph...

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Abstract

The invention belongs to the field of electrochemistry and in particular relates to a Ru / Y(OH)3 hybrid nanostructure as well as a preparation method and application thereof. The preparation method ofthe Ru / Y(OH)3 hybrid nanostructure comprises the steps as follows: ultrasonically and uniformly mixing yttrium nitrate hexahydrate, polyvinylpyrrolidone, a solid of cetyl trimethyl ammonium bromide and an aqueous solution of ruthenium trichloride, then heating an obtained mixture in an oil bath, dropwise adding a sodium borohydride solution to the mixture under a condition of magnetic stirring, performing heat preservation and refluxing, then naturally cooling the mixture to room temperature, and finally, centrifugally separating, washing and drying the mixture to obtain the Ru / Y(OH)3 hybrid nanostructure. The preparation method of the Ru / Y(OH)3 hybrid nanostructure, provided by the invention, has the advantages that the reaction conditions are simple, the repeatability is high, the Ru / Y(OH)3 hybrid nanostructure has excellent electrocatalytic hydrogen evolution activity and stability under an alkaline condition, and the development prospect is good.

Description

technical field [0001] The invention belongs to the field of electrochemistry, in particular to a kind of Ru / Y(OH) 3 Hybrid nanostructures and methods for their preparation and applications. Background technique [0002] The continuous reduction of traditional fossil energy has exacerbated the energy crisis worldwide, and the development and utilization of new renewable green energy has become the focus of modern scientists' research. As a high energy density, green and non-polluting energy, hydrogen energy is considered to be one of the most promising new energy sources in the 21st century. Hydrogen production by electrolysis of water (HER) is an effective way to produce hydrogen, but the Pt catalyst currently used commercially has the disadvantages of low earth reserves, high cost of use, and the electrocatalytic stability needs to be further improved. In addition, the current HER research is mostly focused on acidic conditions, but the industrial hydrogen production pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C25B11/08C25B1/04
CPCC25B1/04C25B11/04B01J23/63B01J35/33Y02E60/36
Inventor 戴志晖刘影包建春陆徐云车志文王伟刘静
Owner NANJING NORMAL UNIVERSITY