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Preparation method of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower as well as material obtained by preparation method and application of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower

A three-dimensional porous, nanoflower technology, applied in the field of Rh-Ir alloy nanoflowers, can solve the problems of difficult to obtain high-purity hydrogen, limit the large-scale application of hydrogen energy, etc., achieve excellent electrocatalytic activity, and is conducive to transport and diffusion. , The effect of easy synthesis of process operation

Active Publication Date: 2020-08-28
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, hydrogen is mainly separated from fossil fuels such as natural gas and coalbed methane. It is difficult to obtain high-purity hydrogen, which greatly limits the large-scale application of hydrogen energy.

Method used

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  • Preparation method of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower as well as material obtained by preparation method and application of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower
  • Preparation method of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower as well as material obtained by preparation method and application of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower
  • Preparation method of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower as well as material obtained by preparation method and application of three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of three-dimensional porous Rh-Ir alloy dendritic nanoflowers, comprising the following steps:

[0026] 1) Polyallylamine hydrochloride as a morphology regulator: Measure 0.5 mL of polyallylamine hydrochloride aqueous solution, mix and disperse in 15 mL of ethylene glycol solution.

[0027] 2) Preparation of three-dimensional porous Rh-Ir alloy dendritic nanoflowers: the measured concentration is 0.03mol L -1 Add 0.3mL rhodium chloride solution and 0.3mL iridium chloride solution into the polyallylamine hydrochloride ethylene glycol solution mixed in step 1), mix well and disperse. Then add 1.0mL of formic acid solution with a concentration of 88%, mix well and disperse, preheat the oil bath to 120°C, and keep it at this temperature for 30min, then raise the temperature to 200°C with a program, and keep at this temperature for 30min, The final product can be obtained by washing several times with water.

Embodiment 2

[0029] A preparation method of three-dimensional porous Rh-Ir alloy dendritic nanoflowers, comprising the following steps:

[0030] 1) Polyallylamine hydrochloride as a morphology regulator: Measure 0.3 mL of polyallylamine hydrochloride aqueous solution, mix and disperse in 15 mL of ethylene glycol solution.

[0031] 2) Preparation of three-dimensional porous Rh-Ir alloy dendritic nanoflowers: the measured concentration is 0.04mol L -1 Add 0.3mL rhodium chloride solution and 0.3mL iridium chloride solution into the polyallylamine hydrochloride ethylene glycol solution mixed in step 1), mix well and disperse. Then add 1.0mL of formic acid solution with a concentration of 88%, mix well and disperse, preheat the oil bath to 120°C, and keep it at this temperature for 30min, then raise the temperature to 200°C with a program, and keep at this temperature for 30min, The final product can be obtained by washing several times with water.

Embodiment 3

[0033] A preparation method of three-dimensional porous Rh-Ir alloy dendritic nanoflowers, comprising the following steps:

[0034] 1) Polyallylamine hydrochloride as a morphology regulator: Measure 0.8 mL of polyallylamine hydrochloride aqueous solution, mix and disperse in 15 mL of ethylene glycol solution.

[0035] 2) Preparation of three-dimensional porous Rh-Ir alloy dendritic nanoflowers: measuring concentration is 0.05mol L -1 Add 0.3mL rhodium chloride solution and 0.3mL iridium chloride solution into the polyallylamine hydrochloride ethylene glycol solution mixed in step 1), mix well and disperse. Then add 1.0mL of formic acid solution with a concentration of 88%, mix well and disperse, preheat the oil bath to 120°C, and keep it at this temperature for 30min, then raise the temperature to 200°C with a program, and keep at this temperature for 30min, The final product can be obtained by washing several times with water.

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Abstract

The invention discloses a preparation method of a three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower, as well as a material obtained by the preparation method and the application of thematerial as a hydrogen evolution catalyst. The method comprises the following steps that polyallylamine serves as a morphology regulating agent, rhodium salt and iridium salt serve as precursors, ethylene glycol and polyallylamine hydrochloride are mixed to be uniform, then a precursor solution of rhodium and iridium is added, and the three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower is obtained through hydrothermal method reduction. Compared with the traditional preparation method, the method provided by the invention is simple in process operation and easy to synthesize, thedeionized water can be used for removing heteroions and excess morphology regulating agent in the solution, and the excess morphology regulating agent is a recyclable green chemical reagent, so thatthe method is environment-friendly and pollution-free. The three-dimensional porous Rh-Ir alloy dendritic crystal nanoflower prepared through the method is not larger than 60 nm in diameter, single inmorphology and extremely high in purity, has the advantages of being large in specific surface area, multiple in active sites, good in electron conductivity, stable in structure and the like, and shows excellent electro-catalytic activity on hydrogen evolution.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional porous Rh-Ir alloy dendritic nanoflower and the obtained material and application thereof, belonging to the technical field of Rh-Ir alloy nanoflower. Background technique [0002] Environmental pollution and energy crisis are becoming more and more serious, and the remarkable advantages of high energy efficiency and low emission of fuel cell technology have attracted widespread attention. As a sustainable source of hydrogen, the water-splitting reaction consisting of hydrogen evolution and oxygen evolution half-reactions, hydrogen is an attractive energy carrier that can be used to generate clean electricity in fuel cells, where the hydrogen Oxidation and reduction reactions of oxygen convert chemical energy into electrical energy. Key to realizing this vision is the development of improved electrocatalysts with appropriate efficiency and selectivity for the chemical transformations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90B82Y30/00
CPCH01M4/88H01M4/9041B82Y30/00Y02E60/50
Inventor 唐亚文刘启成周心怡刘嘉琪邱晓雨徐林孙冬梅
Owner NANJING NORMAL UNIVERSITY
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