A kind of doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material and its preparation method and application

A nickel-iron-based, nano-sheet technology, applied in nanotechnology, electrolytic components, electrodes, etc., can solve problems such as difficult matching, large overpotential of catalyst materials, and poor electron conversion efficiency, so as to improve performance and high-efficiency electrocatalytic hydrogen evolution analysis Oxygen performance, the effect of low production cost

Active Publication Date: 2021-12-07
QIQIHAR UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention aims to solve the problems of existing catalyst materials such as large overpotential, poor electron conversion efficiency and difficulty in matching in the same electrolyte, and provides a doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material and its preparation Methods and Applications

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  • A kind of doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material and its preparation method and application
  • A kind of doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material and its preparation method and application
  • A kind of doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material and its preparation method and application

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Embodiment 1

[0045] Embodiment 1: The preparation method of the doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material of this embodiment is carried out according to the following steps:

[0046] 1. Pretreatment of foamed nickel: First, ultrasonically clean the foamed nickel with a cut size of 3cm×3cm in 50mL of acetone, 50mL of ethanol and 50mL of deionized water for 5 minutes, and then dry it in a vacuum drying oven at a temperature of 80°C. Nickel foam that removes organic matter and oxide film can be obtained;

[0047] 2. Add 2 mmol of ferric nitrate, 1 mmol of zinc acetate, 6 mmol of urea and 6 mmol of hexamethylenetetramine into 30 mL of ethanol, and stir for 3 hours at a stirring speed of 100 r / min to obtain a mixed solution;

[0048] 3. Transfer the mixed solution obtained in step 2 to a 50mL reactor, and then put the nickel foam pretreated in step 1 into the reactor for solvothermal reaction. The temperature of the solvothermal reaction is 150°C, and the...

Embodiment 2

[0058] Embodiment 2: The preparation method of the doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material of this embodiment is carried out according to the following steps:

[0059] 1. Pretreatment of foamed nickel: First, ultrasonically clean the foamed nickel with a cut size of 3cm×3cm in 50mL of acetone, 50mL of ethanol and 50mL of deionized water for 15 minutes, and then dry it in a vacuum drying oven at a temperature of 80°C. Nickel foam that removes organic matter and oxide film can be obtained;

[0060] 2. Add 2mmol of iron acetate, 1mmol of manganese acetate, 7mmol of urea and 7mmol of hexamethylenetetramine into 30mL of isopropanol, and stir for 2h at a stirring speed of 150r / min to obtain a mixed solution;

[0061] 3. Transfer the mixed solution obtained in step 2 to a 50mL reactor, and then put the nickel foam pretreated in step 1 into the reactor for solvothermal reaction. After cooling to room temperature, the precursor is obtained;

[...

Embodiment 3

[0065] Embodiment 3: The preparation method of the doped nickel-iron phosphide-based three-dimensional ultra-thin nanosheet material of this embodiment is carried out according to the following steps:

[0066] 1. Pretreatment of foamed nickel: First, ultrasonically clean the foamed nickel with a cut size of 2cm×2.5cm in 50mL of acetone, 50mL of ethanol and 50mL of deionized water for 5 minutes, and then dry it in a vacuum drying oven at a temperature of 60°C , the nickel foam that removes organic matter and oxide film can be obtained;

[0067] 2. Add 3mmol ferric nitrate, 1mmol zinc acetate, 10mmol urea and 6mmol hexamethylenetetramine to 30mL water and ethanol mixture, the volume ratio of water and ethanol in the water and ethanol mixture is 1:1; Stir for 2 hours at a speed of 150r / min to obtain a mixed solution;

[0068] 3. Transfer the mixed solution obtained in step 2 to a 50mL reactor, and then put the nickel foam pretreated in step 1 into the reactor for solvothermal re...

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Abstract

A doped nickel-iron-phosphide-based three-dimensional ultra-thin nanosheet material and its preparation method and application, which relate to doped nickel-iron-phosphide-based nanometer material and its preparation method and application. It solves the technical problems of large overpotential, poor electron conversion efficiency and difficult matching in the same electrolyte of the existing catalyst. The doped nickel-iron-phosphide-based three-dimensional ultra-thin nanosheet material of the invention consists of foamed nickel and doped nickel-iron-phosphide-based three-dimensional ultrathin nanosheets grown on the foamed nickel in situ. Preparation method: Prepare iron source, doped metal source, and alkali source into a mixed solution, transfer it to a reaction kettle, and then put nickel foam into the kettle for solvothermal reaction to obtain a precursor; the precursor is obtained after phosphating . The material in the HER reaction, 10mA cm ‑2 Under the overpotential as low as 47mV; in the OER reaction, 50mA cm ‑2 The overpotential is as low as 259mV. It can be used in the fields of electrocatalytic hydrogen evolution, oxygen evolution or total water splitting.

Description

technical field [0001] The invention relates to doped nickel-iron phosphide-based nanometer material and its preparation method and application. Background technique [0002] Energy and the environment are the eternal themes of human beings. At present, hydrogen energy is considered to be one of the most potential candidates to solve the future energy crisis and reduce environmental pollution. Among the many hydrogen energy production methods, electrocatalytic water splitting provides the most effective way to produce clean and efficient hydrogen energy. Electrocatalytic water splitting includes two half-reactions: cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). However, the inconsistent activity of electrocatalysts in HER and OER reactions makes it difficult to match in the same electrolyte and over The potential is also high, which seriously restricts the industrialization progress of electrocatalytic water splitting hydrogen produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/075B82Y40/00C25B1/04
CPCB82Y40/00C25B1/04Y02E60/36
Inventor 孙立党莹谢振彬赵冰孙靖卓姜兆成杨芷奇叶军王福洋
Owner QIQIHAR UNIVERSITY
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