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NiPd/Ni anchored nitrogen-doped carbon nanosheet composite material, and preparation method and application thereof

A technology of nitrogen-doped carbon and composite materials, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the insufficient performance of bifunctional oxygen electrocatalysis, hinder the performance of zinc-air batteries, and scarcity issues such as high cost

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

But not only their scarcity and high cost are important issues, but also their insufficient bifunctional oxygen electrocatalytic performance and stability are also shortcomings.
Due to poor compatibility after mixing, this strategy often fails to control the uniform distribution of particles and produce effective contact interfaces.
These defects inevitably lead to the agglomeration and dissolution of active components during the long-term operation of Zn-air batteries, hindering the further improvement of Zn-air battery performance.

Method used

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  • NiPd/Ni anchored nitrogen-doped carbon nanosheet composite material, and preparation method and application thereof
  • NiPd/Ni anchored nitrogen-doped carbon nanosheet composite material, and preparation method and application thereof
  • NiPd/Ni anchored nitrogen-doped carbon nanosheet composite material, and preparation method and application thereof

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preparation example Construction

[0042] The preparation method of the present invention comprises the following steps:

[0043] (1) Prepare Ni at 80-200°C by solvothermal method 2+ / Pd 2+ / iminodiacetonitrile nanosheet complex;

[0044] (2) the Ni 2+ / Pd 2+ / Iminodiacetonitrile nano-sheet complex is heat-treated for a period of time in an inert / reducing atmosphere at 600-800° C. through temperature programming to obtain nitrogen-doped carbon nano-sheets anchored by NiPd / Ni; Nitrogen-doped carbon nanosheet composites loaded with NiPd alloy and Ni elemental substance.

Embodiment 1

[0046] A preparation method for anchoring NiPd / Ni nitrogen-doped carbon nanosheet composite material, comprising the following steps:

[0047] 1)Ni 2+ / Pd 2+ Preparation of iminodiacetonitrile nanosheet complex: weigh 60mg Ni(acac) 2 with 7.1mgPd(acac) 2 and 150 mg of iminodiacetonitrile (the molar ratio of nickel compound / palladium compound / iminodiacetonitrile is 10:1:67) was added to a reaction kettle containing 30 mL of benzyl alcohol; mechanically stirred and ultrasonicated for 6 h at room temperature , so that the solids are completely dissolved and mixed evenly; then put the dissolved solution reactor into an oven for reaction at 140°C for 6 hours, after cooling to room temperature, the obtained product is washed with ethanol several times and dried to obtain Ni 2+ / Pd 2+ / iminodiacetonitrile nanosheet complex;

[0048] 2) Preparation of nitrogen-doped carbon nanosheet composite anchoring NiPd / Ni: the khaki Ni obtained in step 1) 2+ / Pd 2+ / iminodiacetonitrile na...

Embodiment 2

[0051] A preparation method for anchoring NiPd / Ni nitrogen-doped carbon nanosheet composite material, comprising the following steps:

[0052] 1) 1) Ni 2+ / Pd 2+ Preparation of iminodiacetonitrile nanosheet complex: weigh 60mg Ni(acac) 2 with 14.2mg Pd(acac) 2 and 150mg of iminodiacetonitrile (the molar ratio of nickel compound / palladium compound / iminodiacetonitrile is 10:2:67) was added to a reaction kettle containing 30mL of benzyl alcohol; mechanically stirred and ultrasonicated for 6h at room temperature , so that the solids are completely dissolved and mixed uniformly; then put the dissolved solution reactor into an oven for reaction at 140°C for 6 hours, after cooling to room temperature, the obtained product is washed with ethanol several times and dried to obtain Ni 2+ / Pd 2+ / iminodiacetonitrile nanosheet complex;

[0053] 2) Preparation of nitrogen-doped carbon nanosheet composite anchoring NiPd / Ni: the khaki Ni obtained in step 1) 2+ / Pd 2+ / iminodiacetonitr...

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Abstract

The invention discloses a NiPd / Ni anchored nitrogen-doped carbon nanosheet composite material, and a preparation method and application thereof. The NiPd / Ni anchored nitrogen-doped carbon nanosheet composite material takes a nitrogen-doped carbon nanosheet with a three-dimensional nanostructure as a carrier, and NiPd alloy and Ni metal elementary substance nanoparticles are uniformly anchored on the carrier. The method is simple and easy to implement, raw materials are low in cost, and large-scale production can be achieved. The NiPd / Ni anchored nitrogen-doped carbon nanosheet composite material prepared by the method disclosed by the invention has a three-dimensional nanostructure (nitrogen-doped carbon nanosheets), and NiPd alloy and Ni metal elementary substance nanoparticles with superfine particle sizes (about 13.0 nm) are uniformly anchored on the carbon nanosheets. The material can be used as an alkaline bifunctional oxygen electro-catalytic material, and has excellent activity and stability.

Description

technical field [0001] The invention relates to the technical field of an alkaline bifunctional oxygen electrocatalyst, in particular to a NiPd / Ni-anchored nitrogen-doped carbon nanosheet composite material and its preparation method and application. Background technique [0002] With the increasing energy demand of portable electronic devices and electric vehicles, efficient and safe energy storage and conversion technologies have received extensive attention, so high energy density (1086Wh kg -1 ), low cost, and excellent safety, rechargeable Zn–air batteries are considered as one of the most promising candidates. Rechargeable zinc-air batteries generate electricity through the oxidation-reduction reaction of metallic zinc at the anode and oxygen at the air cathode. However, the sluggish oxygen reaction kinetics of the oxygen reduction and evolution reactions (ORR / OER) in air cathodes limit their practical applications. Due to the slow kinetics of the reversible oxygen r...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/92H01M4/88H01M12/08B82Y30/00B82Y40/00
CPCH01M4/9041H01M4/9083H01M4/921H01M4/926H01M4/8825H01M12/08B82Y30/00B82Y40/00H01M2004/8689Y02E60/50
Inventor 付更涛李志娟沈彬彬胡锦瑞赵翠婷孙冬梅唐亚文
Owner NANJING NORMAL UNIVERSITY
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