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A Prussian blue analog nanosheet array material and its application in electrolysis of water

A nanosheet array and aqueous solution technology, which is applied in electrolytic components, electrolytic processes, electrodes, etc., can solve the problems of low utilization of active sites, poor conductivity of PBA, low electrocatalytic performance, etc., and achieve fast mass transfer and electron transport capabilities , high stability, large specific surface area effect

Active Publication Date: 2021-04-02
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor conductivity and low utilization of active sites of PBA, its electrocatalytic performance is far lower than that of noble metals, which limits its further application.

Method used

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  • A Prussian blue analog nanosheet array material and its application in electrolysis of water
  • A Prussian blue analog nanosheet array material and its application in electrolysis of water
  • A Prussian blue analog nanosheet array material and its application in electrolysis of water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation process of ultrathin Prussian blue analog nanosheet catalyst (2D CoFe-PBA@NF-24) is as follows:

[0038] 1) Cut blank nickel foam (1cm×2cm) and use acetone, ethanol, and deionized water to sonicate for 15 minutes respectively to remove surface pollutants, and put it in a 60°C oven for 6 hours before using it as a substrate.

[0039] 2) 100mL Co(NO 3 ) 2 ·6H 2 O (3mmol) aqueous solution was added to 100mL Na 2 Fe(CN) 5 NO·H 2 O (1 mmol) aqueous solution, the resulting solution was stirred at room temperature for 1 min until the solution became cloudy. Put the treated foamed nickel substrate into it, and let it stand in a dark place at room temperature for 24 hours. Finally, the nickel foam obtained by the reaction was rinsed with deionized water, and dried in an oven at 60°C for 12 hours to obtain the product 2D CoFe-PBA@NF-24.

[0040] When the 2D CoFe-PBA@NF-24 electrocatalyst prepared in this example is used to catalyze the hydrogen evolution re...

Embodiment 2

[0054] In this example, when Co(NO 3 ) 2 ·6H 2 O solution and Na 2 Fe(CN) 5 NO·H 2 After the O solution was mixed, the nickel foam substrate was put into the mixed solution, and left to react for 2 hours at room temperature in the dark, and the rest was the same as in Example 1 to prepare a 2D CoFe-PBA@NF-2 electrocatalyst.

Embodiment 3

[0056] In this example, when Co(NO 3 ) 2 ·6H 2 O solution and Na 2 Fe(CN) 5 NO·H 2 After the O solution was mixed, the nickel foam substrate was put into the mixed solution, and left to react for 12 hours at room temperature in the dark, and the rest was the same as in Example 1 to prepare a 2D CoFe-PBA@NF-12 electrocatalyst.

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Abstract

The invention relates to a Prussian blue analog nanosheet array material and its application in water electrolysis. The material preparation method includes the following steps: 1) pretreating nickel foam as a matrix; 2) adding Co(NO 3 ) 2 ·6H 2 O solution and Na 2 Fe(CN) 5 NO·H 2 O solution is mixed, and then stirred at room temperature until the solution is turbid, to obtain a mixed solution; 3) Put the matrix into the mixed solution, and let it stand for 2-48 hours to react. After post-processing, the Prussian blue analog nanosheet array material is obtained; The material acts as a catalyst for electrolysis of water. Compared with the existing technology, the ultra-thin Prussian blue analog nanosheet array material prepared by the present invention not only has a simple preparation process and low cost, but also can perform stable and efficient hydrogen evolution reaction, oxygen evolution reaction and full water reaction at different current densities. Decomposition has huge potential value in large-scale hydrogen production applications.

Description

technical field [0001] The invention belongs to the technical field of materials and energy, and relates to a Prussian blue analogue nanosheet array material, its preparation and its application in electrolyzing water. Background technique [0002] The depletion of fossil fuels and emerging environmental issues are driving the rapid development of hydrogen energy. As a way to produce hydrogen, electrolysis of water can be used in conjunction with photovoltaic systems and wind turbines to convert electrical energy into stable chemical energy in an environmentally friendly manner. It is a practical technology in line with sustainable development and has broad development prospect. During water electrolysis, two electrode half-reactions mainly occur, namely hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). However, due to the existence of energy barriers in the thermodynamic and kinetic processes of these two half-reactions, a high overpotential is requir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/052C25B11/061C25B11/085C25B11/03B01J31/22B01J35/10B01J37/03
CPCC25B1/04B01J31/1691B01J31/1805B01J37/031B01J2531/842B01J2531/845C25B11/031C25B11/075B01J35/33B01J35/643Y02E60/36
Inventor 吴仁兵费奔陈子亮
Owner FUDAN UNIV
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