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Ultrathin porous Ce-Ni-O-S nanosheet, and preparation method and application thereof

A ce-ni-o-s, nanosheet technology, applied in the field of nanometers, can solve the problems of limiting the commercial application of catalysts, high catalyst overpotential, slow kinetics, etc., and achieve excellent OER performance, short time, and low reaction temperature.

Active Publication Date: 2018-06-01
江苏载驰科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although IrO 2 and RuO 2 It is also the electrocatalyst with the best catalytic OER properties at present, but the disadvantage is that IrO 2 and RuO 2 Expensive, which further limits the commercial application of the catalyst
[0004] Literature research shows that due to the strong O=O bond, OER requires multi-step electron transfer and transfer, resulting in slow kinetics and high overpotential of the catalyst.

Method used

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  • Ultrathin porous Ce-Ni-O-S nanosheet, and preparation method and application thereof
  • Ultrathin porous Ce-Ni-O-S nanosheet, and preparation method and application thereof
  • Ultrathin porous Ce-Ni-O-S nanosheet, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] At room temperature, weigh 55 mg (0.1 mmol) (NH 4 ) 2 Ce(NO 3 ) 6 , 145 mg (0.5 mmol) Ni(NO 3 ) 2 . 6H 2 O, 228 mg (3 mmol) CS(NH 2 ) 2 powder, and all raw materials were added together into a dry three-necked round-bottomed flask with a capacity of 250 mL, and then 5 mL of DDA, 5 mL of ODE, and 3 mL of OA were measured with a graduated cylinder, and added to the three-necked round-bottomed flask, Sonicate and stir until completely dissolved to give a solution.

[0030] The three-neck round bottom flask was transferred to a sand bath, and the temperature was raised to 280 °C at a rate of 8 °C / min under programmed temperature control for 30 min until the reaction was completed. After the reactor was naturally cooled to room temperature, an appropriate amount of n-heptane and ethanol mixed at a volume ratio of 1:1 was added to disperse, and the solid was separated by centrifugation. The solid was washed to obtain a black product, which was used for analysis and...

Embodiment 2

[0034] At room temperature, weigh 55 mg (0.1 mmol) (NH 4 ) 2 Ce(NO 3 ) 6 , 145 mg (0.5 mmol) Ni(NO 3 ) 2 . 6H 2 O, 228 mg (3 mmol) CS(NH 2 ) 2 powder, and all raw materials were added together into a dry three-necked round-bottomed flask with a capacity of 250 mL, and then 5 mL of DDA, 5 mL of ODE, and 3 mL of OA were measured with a graduated cylinder, and added to the three-necked round-bottomed flask, Sonicate and stir until completely dissolved to give a solution.

[0035] The three-necked round-bottom flask was transferred to a sand bath, and the temperature was raised to 280 °C at a rate of 4 °C / min under programmed temperature control for 30 min until the end of the reaction. After the reactor was naturally cooled to room temperature, an appropriate amount of n-heptane and ethanol mixed at a volume ratio of 1:1 was added to disperse, and the solid was separated by centrifugation. The solid was washed to give a black product, which was dried overnight in a vac...

Embodiment 3

[0037] At room temperature, weigh 55 mg (0.1 mmol) (NH 4 ) 2 Ce(NO 3 ) 6 , 145 mg (0.5 mmol) Ni(NO 3 ) 2 . 6H 2 O, 228 mg (3 mmol) CS(NH 2 ) 2 powder, and all raw materials were added together into a dry three-necked round-bottomed flask with a capacity of 250 mL, and then 5 mL of DDA, 5 mL of ODE, and 3 mL of OA were measured with a graduated cylinder, and added to the three-necked round-bottomed flask, Sonicate and stir until completely dissolved to give a solution.

[0038] The three-neck round bottom flask was transferred to a sand bath, and the temperature was directly raised to 280 °C for 30 min until the reaction was completed. After the reactor was naturally cooled to room temperature, an appropriate amount of n-heptane and ethanol were added to disperse, and the solid was separated by centrifugation. The solid was washed to give a black product, which was dried overnight in a vacuum oven.

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Abstract

The invention discloses an ultrathin porous Ce-Ni-O-S nanosheet, and a preparation method and application thereof, which belong to the field of nanometer. The ultrathin porous Ce-Ni-O-S nanosheet adopts Ce, Ni, O and S as main elements, is of an irregular ultrathin platy structure, has a porous structure, and has more dislocation and step defect sites; the Ce, the Ni, the O and the S are uniformlydistributed on a hexagon sheet, so that the nanosheet has excellent OER performance and is superior to IrO2 sold on the market currently. The preparation method provided by the invention adopts a one-pot method, utilizes a program temperature control mode to obtain the ultrathin porous Ce-Ni-O-S nanosheet, is simple in process, low in reaction temperature, short in time, and suitable for batch production, and has guiding significance on renewable energy technology development.

Description

technical field [0001] The invention relates to an ultra-thin porous Ce-Ni-O-S nanosheet, a preparation method and application thereof, and belongs to the field of nanometers. Background technique [0002] As the global economy grows, everyone becomes more dependent on energy. So far, most of the energy we need comes from traditional fossil fuels (coal, oil, natural gas, etc.), which are not sustainable and have limited reserves. The severe energy crisis and environmental pollution caused by fossil energy consumption are increasingly endangering the sustainable development of human society. It is imminent to develop efficient and low-cost green energy storage technology and new energy. [0003] Fuel cells have the characteristics of high energy efficiency, no noise, no pollution, and continuous and stable operation. They are considered to be the most promising new energy technology in the 21st century. will normal H 2 -O 2 The fuel cell and the water electrolysis cell ar...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J35/00B01J35/02B01J35/10C25B1/04C25B11/06
CPCC25B1/04B01J27/043C25B11/075B01J35/23B01J35/33B01J35/50B01J35/60Y02P20/133Y02E60/36
Inventor 刘苏莉周靓靓刘钦普陈昌云张琦张皖佳
Owner 江苏载驰科技股份有限公司
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