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Nickel cobaltate nano material as well as preparation method and application thereof

A nanomaterial, nickel cobalt oxide technology, applied in nanotechnology, chemical instruments and methods, nickel compounds and other directions, can solve the problems of single structure and morphology, can not meet the needs of applications, weak catalytic activity, etc., achieves low preparation cost, The effect of high recycling rate and poor recyclability

Active Publication Date: 2021-06-11
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of common nickel cobalt oxide electrocatalysts is still far from meeting the needs of direct methanol fuel cell applications due to its single structure and morphology and relatively weak catalytic activity.

Method used

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  • Nickel cobaltate nano material as well as preparation method and application thereof
  • Nickel cobaltate nano material as well as preparation method and application thereof
  • Nickel cobaltate nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1 Preparation of hollow porous nickel cobaltate nanomaterials with oxygen-rich vacancy defects

[0066] Preparation of Ni-Co-glycerol precursor

[0067] Nickel nitrate hexahydrate and cobalt nitrate hexahydrate were dissolved in a polytetrafluoroethylene reactor (50 ml) filled with isopropanol, and then glycerol and water were added to form a mixed solution. In the mixed solution, the quality of cobalt nitrate hexahydrate is 64mg, the quality of nickel nitrate hexahydrate is 32mg, the volume of isopropanol is 35ml, the volume of glycerol is 5ml, and the volume of water is 1ml. Then place the polytetrafluoroethylene reactor in a homogeneous reactor for heating, make the mixed solution react at a temperature of 190° C. for 12 hours at a stirring speed of 15 r / min, cool the obtained product at room temperature, and then The product was centrifuged, washed once with ethanol and water, and then dried at 105 °C to obtain the Ni-Co-glycerol precursor.

[0068] NiC...

Embodiment 2

[0070] Example 2 Preparation of hollow porous nickel cobaltate nanomaterials with oxygen-rich vacancy defects

[0071] Preparation of Ni-Co-glycerol precursor

[0072] Nickel nitrate hexahydrate and cobalt nitrate hexahydrate were dissolved in a polytetrafluoroethylene reactor (50 ml) filled with isopropanol, and then glycerol and water were added to form a mixed solution. In the mixed solution, the quality of cobalt nitrate hexahydrate is 64mg, the quality of nickel nitrate hexahydrate is 32mg, the volume of isopropanol is 35ml, the volume of glycerol is 5ml, and the volume of water is 1ml. Then place the polytetrafluoroethylene reactor in a homogeneous reactor for heating, make the mixed solution react at a temperature of 180° C. for 12 hours at a stirring speed of 15 r / min, cool the obtained product at room temperature, and then prepare the obtained The product was centrifuged, washed once with ethanol and water, and then dried at 105 °C to obtain the Ni-Co-glycerol prec...

Embodiment 3

[0075] Example 3 Preparation of hollow porous nickel cobaltate nanomaterials with oxygen-rich vacancy defects

[0076] Preparation of Ni-Co-glycerol precursor

[0077] Nickel nitrate hexahydrate and cobalt nitrate hexahydrate were dissolved in a polytetrafluoroethylene reactor (50 ml) filled with isopropanol, and then glycerol and water were added to form a mixed solution. In the mixed solution, the quality of cobalt nitrate hexahydrate is 64mg, the quality of nickel nitrate hexahydrate is 32mg, the volume of isopropanol is 35ml, the volume of glycerol is 5ml, and the volume of water is 1ml. Then place the polytetrafluoroethylene reactor in a homogeneous reactor for heating, make the mixed solution react at a temperature of 190° C. for 12 hours at a stirring speed of 15 r / min, cool the obtained product at room temperature, and then The product was centrifuged, washed once with ethanol and water, and then dried at 105 °C to obtain the Ni-Co-glycerol precursor.

[0078] NiC...

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Abstract

The invention discloses a nickel cobaltate nano material as well as a preparation method and application thereof. The nano material is spherical, is in the diameter of 0.1-1 mu m, has a porous and hollow structure, has oxygen-rich vacancy defects and has the specific surface area of 20-70 m < 2 > / g. The nickel cobaltate nano material is high in activity and low in preparation cost, the preparation method is simple and easy to implement, large-scale batch preparation can be achieved, and the nickel cobaltate nano material has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of electrocatalyst preparation, and in particular relates to a nickel cobaltate nanometer material and its preparation method and application. Background technique [0002] Direct methanol fuel cells have attracted increasing attention due to their high volumetric energy density, abundant and renewable sources of methanol, negligible pollution emissions, easy storage and transportation, and matching with existing petroleum distribution, and are expected to become a new generation of green energy And be widely used. The catalytic reactions in direct methanol fuel cells mainly include methanol oxidation at the anode and oxygen reduction at the cathode. Although platinum-based noble metal materials have been extensively studied as anode and cathode catalysts, their high price and poor cycle performance greatly limit their practical industrial applications. [0003] Among many non-precious metal catalytic mate...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/90B82Y40/00
CPCC01G53/00H01M4/9016B82Y40/00C01P2004/34C01P2004/62C01P2006/12C01P2002/72C01P2004/03C01P2004/04C01P2006/17Y02E60/50
Inventor 陈帅樊卫斌乔岩
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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