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Preparation method and electrocatalytic application of phosphorus with defects doped CoFe2O4 nanometer powder

A nano-powder, cofe2o4 technology, applied in the direction of electrodes, inorganic chemistry, cobalt compounds, etc.

Inactive Publication Date: 2019-10-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inherent wide bandgap of the oxide itself inhibits its application as an excellent stability in the field of electrocatalysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Take a 50 mL hydrothermal reaction kettle, which has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of water into a 50 mL beaker, add urea (0.0240 g, 0.4 mmol) and trisodium citrate (0.0095 g, 0.032 mmol) in turn under magnetic stirring, and add iron acetate (0.4040 g, 1.0 mmol) after stirring for 10 min ), cobalt acetate (0.1416g, 0.8 mmol), continued to stir for 12 h, and then sucked out its magnetons and transferred them to a polytetrafluoroethylene liner. After sealing the hydrothermal reactor, it was kept in an oven at 130 °C for 12 h. After natural cooling, centrifuge washing several times with deionized water and vacuum drying to obtain black CoFe 2 o 4 Nano powder.

[0023] Step 2: Measure 40 mL of deionized water in a 50 mL laboratory beaker, then add tetrabutylammonium borohydride (5.146 g, 0.02 mol), 0.05 g CoFe 2 o 4 Nanopowders, sonicated for 4 h at room temperature to obtain CoFe with defects 2 o 4 Nano powder.

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Embodiment 2

[0032] Step 1: Take a 50 mL hydrothermal reaction kettle, which has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of water and put it into a 50 mL beaker, add urea (0.0601 g, 1.0 mmol) and trisodium citrate (0.0065 g, 0.022 mmol) in turn under magnetic stirring, and add ferric chloride hexahydrate (0.5406 g , 2.0 mmol), cobalt nitrate hexahydrate (0.2328 g, 0.8 mmol), and continued to stir for 12 h, and then the magnetons were sucked out and transferred to a polytetrafluoroethylene liner. After sealing the hydrothermal reactor, it was kept in an oven at 150 °C for 22 h. After natural cooling, centrifuge washing several times with deionized water and vacuum drying to obtain black CoFe 2 o 4 Nano powder.

[0033] Step 2: Measure 40 mL of deionized water in a 50 mL laboratory beaker, then add sodium borohydride (2.2698 g, 60 mmol), 0.05 g CoFe 2 o 4 Nano-powders were ultrasonically treated for 3 h at room temperature to obtain CoFe with defects 2 o...

Embodiment 3

[0042] Step 1: Take a 50 mL hydrothermal reaction kettle, which has a stainless steel shell and a polytetrafluoroethylene liner. Take 40 mL of water into a 50 mL beaker, add urea (0.0841 g, 1.4 mmol) and trisodium citrate (0.0035 g, 0.012 mmol) in turn under magnetic stirring, stir for 10 min, then add ferric nitrate nonahydrate (0.4848 g, 1.2 mmol), cobalt chloride hexahydrate (0.1428 g, 0.6 mmol), and continued to stir for 12 h, and then the magnetons were sucked out and transferred to a polytetrafluoroethylene liner. After sealing the hydrothermal reactor, it was kept in an oven at 150 °C for 26 h. After natural cooling, centrifuge washing several times with deionized water and vacuum drying to obtain black CoFe 2 o 4 Nano powder.

[0043] Step 2: Measure 40 mL of deionized water in a 50 mL laboratory beaker, then add sodium borohydride (1.5132 g, 40 mmol), 0.05 g CoFe 2 o4 Nano-powders were ultrasonically treated for 3 h at room temperature to obtain CoFe with defects ...

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Abstract

The invention provides a preparation method and electrocatalytic applicationof a phosphorus with defects doped aCoFe2O4 nanometer powder. First, a cobalt - iron prereaction solution is prepared by adding a certain proportion of cobalt and iron sources in a reaction solution, and the CoFe2O4 nanometer powder is collected after heating the prereaction solution for a certain time;and then, the CoFe2O4 nanometer powder is processed for a period of time under the action of a reducing agent to obtain the CoFe2O4 nanometer powder with vacancy defects,secondly, phosphating treatment of the CoFe2O4 nanometer powder with the vacancy defects is carried out,phosphorus atoms are introduced and finally the phosphorus with defects doped a CoFe2O4 nanometer powder is obtained. Specifically, the phosphoruswith the defects doped theCoFe2O4 nanometer powdershows excellent catalytic activity in electrocatalytic oxygen production reaction (OER), an overpotential is 0.287 V (relative to a standard hydrogenelectrode), a tafel slope is down to 56 mV / dec,and charge transfer resistance is reduced to 47ohm.

Description

technical field [0001] The invention relates to the field of preparation and application of inorganic nanopowders, in particular to a phosphorus-doped CoFe with defects prepared based on a solvothermal method. 2 o 4 The method of nanopowder and its application in the field of electrocatalytic water splitting. Background technique [0002] With the progress of the times and the development of science and technology, people's demand for energy is gradually increasing. However, the resources of fossil fuels currently widely used are scarce and limited, and the environmental pollution caused by the energy release process cannot be ignored, which leads to major difficulties in their further application. Exploring and developing clean, efficient and renewable new energy sources has become the focus of energy research in the world today. A lot of work is devoted to the development of clean alternative energy sources, such as: solar energy, tidal energy, wind energy, hydrogen ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00C25B1/04C25B11/06
CPCC01G51/00C01P2006/40C25B1/04C25B11/051C25B11/077Y02E60/36
Inventor 孙旭郭成英高令峰马晓晶赵明珠赵磊匡轩魏琴
Owner UNIV OF JINAN
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