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A deep eutectic solvent-assisted synthesis of graphene-encapsulated ni 2 p material

A deep eutectic solvent and graphene technology, applied in the field of electrocatalytic materials, can solve the problems of complex preparation methods of carbon material encapsulation catalysts, few three-dimensional TM and its compound encapsulation, and achieve good electrocatalytic hydrogen evolution and oxygen evolution performance, Conducive to the transport of charges and the effect of regular shape

Active Publication Date: 2020-09-15
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this encapsulation technology has made some progress, there are few reports on the encapsulation of 3D TM and its compounds in carbon-based materials for total water splitting.
Moreover, the preparation method of encapsulating catalysts with carbon materials is complicated

Method used

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  • A deep eutectic solvent-assisted synthesis of graphene-encapsulated ni <sub>2</sub> p material
  • A deep eutectic solvent-assisted synthesis of graphene-encapsulated ni <sub>2</sub> p material
  • A deep eutectic solvent-assisted synthesis of graphene-encapsulated ni <sub>2</sub> p material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 0.01mol nickel chloride hexahydrate and 0.11mol malonic acid in a 90°C oil bath for 10 minutes to form a deep deep eutectic solvent, then roast the formed deep deep eutectic solvent in a nitrogen atmosphere, place a second Sodium phosphate, the roasting condition is 5℃·min -1 The heating rate was increased to 400°C, and after 4 hours of heat preservation, it was naturally cooled with the furnace to obtain the finished product.

Embodiment 2

[0041] Mix 0.01mol nickel chloride hexahydrate and 0.04mol polyethylene glycol 200 in an oil bath at 50°C for 10 minutes to form a deep deep eutectic solvent, and then roast the formed deep deep eutectic solvent in a nitrogen atmosphere. Sodium hypophosphite is placed, and the roasting condition is 5°C·min -1 The heating rate was increased to 400°C, and after 4 hours of heat preservation, it was naturally cooled with the furnace to obtain the finished product.

Embodiment 3

[0043] Mix 0.01mol nickel chloride hexahydrate and 0.04mol malonic acid in a 90°C oil bath for 10 minutes to form a deep deep eutectic solvent, then roast the formed deep deep eutectic solvent in a nitrogen atmosphere, place a second Sodium phosphate, the roasting condition is 5℃·min -1The heating rate was increased to 400°C, and after 4 hours of heat preservation, it was naturally cooled with the furnace to obtain the finished product.

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Abstract

The invention discloses a deep eutectic solvent auxiliary synthesized graphene encapsulation Ni2P material. Firstly, a 3d transition metal compound and a carbon source material are mixed to form a deep eutectic solvent; then, the formed deep eutectic solvent is put into a nitrogen atmosphere furnace; nickel phosphide is placed upstream of the heating region; roasting is performed to obtain a finished product. The method has the advantages that the operation is simple; the preparation cost is low; the industrialized production is easy; the obtained graphene encapsulation Ni2P material has regular appearance, adjustable dimension and good crystal form. In addition, the phase interface formed under the graphene encapsulation Ni2P material is favorable for the effective separation of charges;the electric catalysis activity is improved. In addition, the generation of the graphene is favorable for charge transmission; the sample electric catalysis activity is improved; in addition, the graphene can be used as loricae for inhibiting the corrosion of the graphene encapsulation Ni2P material and improve the stability of the catalyst; the graphene encapsulation Ni2P material obtained by different ligands has good electric catalytic nitrogen and oxygen evolution performance.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and relates to a deep deep eutectic solvent-assisted synthesis of graphene-encapsulated Ni 2 P material. Background technique [0002] With the reduction of fossil fuels and the increase of environmental pollution, future societies will have to rely on sustainable and renewable energy sources for development. Water electrolysis is considered a promising and sustainable method for producing clean hydrogen fuels from aqueous solutions. However, the practical applications of water electrolysis are very limited. Because of the high energy barriers that need to be overcome for the splitting reactions, including anodic oxygen evolution reaction (OER) and cathodic hydrogen evolution reaction (HER). Currently, Pt is the most efficient HER electrocatalyst with near-zero overpotential, while IrO 2 and RuO 2 It is a good OER electrocatalyst. However, the scarcity and high cost of these noble ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/08C01B32/182C01B3/02B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01B3/02C01B25/08C01B32/182C01B2204/04C01P2002/72C01P2004/03C01P2004/04
Inventor 牟天成牟红宇
Owner RENMIN UNIVERSITY OF CHINA