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Preparation method of cyano-modified Pt-based superfine nanowire, and obtained material and application of cyano-modified Pt-based superfine nanowire

An ultra-fine nano, cyano-based technology, applied in the field of hydrogen evolution catalysts, can solve the problems of difficulty in obtaining high-purity hydrogen and limiting the large-scale application of hydrogen energy.

Active Publication Date: 2021-09-14
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 cyano-modified Pt-based superfine nanowire, and obtained material and application of cyano-modified Pt-based superfine nanowire
  • Preparation method of cyano-modified Pt-based superfine nanowire, and obtained material and application of cyano-modified Pt-based superfine nanowire
  • Preparation method of cyano-modified Pt-based superfine nanowire, and obtained material and application of cyano-modified Pt-based superfine nanowire

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Embodiment 1

[0030] A preparation method of cyano-modified Pt-based ultra-fine nanowires, comprising the following steps:

[0031] 1) Cyanoacetic acid as a morphology regulator: the measured concentration is 0.03mol L -1 0.3mE aqueous solution of cyanoacetic acid, mixed and dispersed in 5mL ethylene glycol solution.

[0032] 2) Preparation of cyano-modified Pt-based ultra-fine nanowires: the measured concentration is 0.03mol L -1 Add 0.3mL of potassium chloroplatinite solution into the solution mixed in step 1), mix well and disperse. Then add 0.5mL, the concentration is 0.03mL L -1 After mixing and dispersing the sodium cyanoborohydride solution, the oil bath is preheated to 100°C, and kept at this temperature for 30 minutes, and washed several times with water to obtain the final product.

Embodiment 2

[0034] A preparation method of cyano-modified Pt-based ultra-fine nanowires, comprising the following steps:

[0035] 1) Cyanoacetic acid as a morphology regulator: the measured concentration is 0.03mol L -1 0.5mL cyanoacetic acid aqueous solution, mix and disperse in 5mL ethylene glycol solution.

[0036] 2) Preparation of cyano-modified Pt-based ultra-fine nanowires: the measured concentration is 0.03mol L -1 0.7mL of potassium chloroplatinite solution was added to the mixed solution in step 1), mixed evenly and dispersed. Then add 0.5mL, the concentration is 0.03mL L -1 After mixing and dispersing the sodium cyanoborohydride solution, the oil bath is preheated to 100°C, and kept at this temperature for 30 minutes, and washed several times with water to obtain the final product.

Embodiment 3

[0038] A preparation method of cyano-modified Pt-based ultra-fine nanowires, comprising the following steps:

[0039] 1) Cyanoacetic acid as a morphology regulator: the measured concentration is 0.03mol L -1 0.3mL cyanoacetic acid aqueous solution, mix and disperse in 5mL ethylene glycol solution.

[0040] 2) Preparation of cyano-modified Pt-based ultrafine nanowires: the measured concentration is 0.07mol L -1 Add 0.6mL of potassium chloroplatinite solution into the mixed solution in step 1), mix well and disperse. Then add 0.5mL, the concentration is 0.05mL L -1 After mixing and dispersing the sodium cyanoborohydride solution, the oil bath was preheated to 120°C and kept at this temperature for 30 minutes, and washed several times with water to obtain the final product.

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Abstract

The invention discloses a preparation method of a cyano-modified Pt-based superfine nanowire, and an obtained material and application of the cyano-modified Pt-based superfine nanowire. Cyanoacetic acid is taken as a morphology regulating agent and a cyano introducing agent, platinum salt is taken as a precursor, ethylene glycol and cyanoacetic acid are uniformly mixed and then added into a platinum precursor solution, and the cyano-modified Pt-based superfine nanowire is obtained through reduction by a hydrothermal method. The method is simple in process operation, easy for synthesizing, environment-friendly and pollution-free, and hetero-ions and the excessive morphology regulating agent in the solution can be removed by using deionized water. The cyano-modified Pt-based superfine nanowire prepared by the method has the diameter of about 2nm, is single in morphology and extremely high in purity, has the advantages of large specific surface area, multiple active sites, good electron conductivity, stable structure and the like, and shows excellent electrocatalytic activity on hydrogen evolution.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a hydrogen evolution catalyst. 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 involved. At present, hydrogen is mainly separated from fossil fuels such as natural gas and coalbed methane. It is diffi...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00C25B1/04C25B11/081H01M4/92
CPCB22F9/24B82Y40/00B82Y30/00C25B11/081C25B1/04H01M4/92Y02E60/36Y02E60/50
Inventor 唐亚文刘启成王轩刘嘉琪孟庆伟付更涛
Owner NANJING NORMAL UNIVERSITY