A kind of preparation method of three-dimensional porous rh-ir alloy dendritic nanoflowers, obtained materials and applications

A three-dimensional porous and nanoflower technology, applied in the field of Rh-Ir alloy nanoflowers, can solve the problems of difficult to obtain high-purity hydrogen and limit the large-scale application of hydrogen, achieve excellent electrocatalytic activity, and facilitate transmission and diffusion , the effect of good electrochemical stability

Active Publication Date: 2021-07-09
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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  • A kind of preparation method of three-dimensional porous rh-ir alloy dendritic nanoflowers, obtained materials and applications
  • A kind of preparation method of three-dimensional porous rh-ir alloy dendritic nanoflowers, obtained materials and applications
  • A kind of preparation method of three-dimensional porous rh-ir alloy dendritic nanoflowers, obtained materials and applications

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Experimental program
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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 method for preparing a three-dimensional porous Rh-Ir alloy dendritic nanoflower, the obtained material and its application as a hydrogen evolution catalyst. The method comprises the following steps: using polyallylamine as a morphology regulator, Using rhodium salts and iridium salts as precursors, mix ethylene glycol and polyallylamine hydrochloride evenly, add rhodium and iridium precursor solutions, and obtain three-dimensional porous Rh‑Ir alloy dendrite nanoflowers through hydrothermal reduction . Compared with the traditional preparation method, the process of the present invention is simple and easy to synthesize, and deionized water can be used to remove the miscellaneous ions and excess morphology regulator in the solution, and the excess morphology regulator is a recyclable green chemical reagent. Environmentally friendly and pollution-free. The three-dimensional porous Rh-Ir alloy dendritic nanoflowers prepared by the method of the present invention have a diameter of no more than 60nm, a single appearance, high purity, large specific surface area, many active sites, good electronic conductivity, and stable structure. The hydrogen evolution exhibits excellent electrocatalytic activity.

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 Patents(China)
IPC IPC(8): H01M4/88H01M4/90B82Y30/00
CPCB82Y30/00H01M4/88H01M4/9041Y02E60/50
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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