Porous nitrogen-doped graphene composite cobalt phosphide nanosheet and preparation method and application thereof

A nitrogen-doped graphene and cobalt phosphide technology, applied in the field of electrocatalytic materials, can solve problems such as low electrical conductivity, and achieve the effects of high controllability, low price and simple operation

Active Publication Date: 2020-04-10
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most homogeneous TMPs catalysts are difficult to controllably synthesize at the nanoscale and have relatively low electrical conductivity

Method used

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  • Porous nitrogen-doped graphene composite cobalt phosphide nanosheet and preparation method and application thereof
  • Porous nitrogen-doped graphene composite cobalt phosphide nanosheet and preparation method and application thereof
  • Porous nitrogen-doped graphene composite cobalt phosphide nanosheet and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 0.1mol cobalt chloride hexahydrate, 0.15mol tetrabutylphosphine chloride and 4g urea were used to form uniform DESs in an oil bath at 60°C. Pipette 100 μL of DESs and drop-coat it on carbon cloth, place it in an ark with a cover and bake it in a muffle furnace. The baking conditions: 5°C / min to 450°C, keep it warm for 4h to obtain porous graphene composite cobalt phosphide nanosheets catalyst.

Embodiment 2

[0036] 0.1mol cobalt chloride hexahydrate, 0.15mol tetrabutylphosphine chloride and 4g urea were used to form uniform DESs in an oil bath at 60°C. Pipette 100 μL of DESs and drop-coat it on carbon cloth, place it in an ark with a cover and bake it in a muffle furnace. Baking conditions: 5°C / min to 300°C, keep warm for 4h to obtain porous graphene composite cobalt phosphide nanosheets catalyst.

Embodiment 3

[0038] 0.1mol cobalt chloride hexahydrate, 0.15mol tetrabutylphosphine chloride and 4g urea were used to form uniform DESs in an oil bath at 60°C. Pipette 100 μL of DESs and drop-coat it on the carbon cloth, place it in an ark with a cover and bake it in a muffle furnace. The baking conditions: 5°C / min to 600°C, keep warm for 4h to obtain porous graphene composite cobalt phosphide nanosheets catalyst.

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Abstract

The invention discloses a porous nitrogen-doped graphene composite cobalt phosphide nanosheet and a preparation method and application thereof. A porous N-doped graphene composite cobalt phosphide electrode material is prepared by adopting a simple one-step pyrolysis eutectic solvent. DESs molecular mixing is beneficial for formation of a composite material with good coupling and uniform loading in the pyrolysis process. In the pyrolysis process, urea is decomposed, so a nitrogen source can be provided, and gas generated by pyrolysis is beneficial for stripping of the obtained material, so thefew-layer nitrogen-doped graphene / cobalt phosphide composite material is obtained. The prepared electrode material realizes hydrogen evolution through water electrolysis under the condition of a fullpH range, and provides a feasible scheme for preparation of a full-pH-range electrocatalytic hydrogen evolution catalyst.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and in particular relates to a porous nitrogen-doped graphene composite cobalt phosphide nanosheet and its preparation method and application. Background technique [0002] The environmental pollution caused by fossil fuel combustion is becoming more and more serious, prompting people to urgently seek clean and sustainable energy carriers. Among alternative energy sources, hydrogen is considered an ideal choice due to its high energy density and zero greenhouse gas emissions. Water electrolysis can produce hydrogen on a large scale, but the premise of efficient hydrogen evolution catalysts is to obtain high cathodic current under low overpotential conditions. Pt is the most active catalyst in acidic medium, but its scarcity and high cost limit its wide application in proton exchange membrane water electrolysis devices under strongly acidic conditions. Therefore, many non-noble metal-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06C23C18/12B82Y40/00
CPCB82Y40/00C23C18/1204C25B1/04C25B11/091Y02E60/36
Inventor 牟天成牟红宇
Owner RENMIN UNIVERSITY OF CHINA
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