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A black phosphorus@titanium dioxide loaded noble metal composite material and its preparation method

A composite material, titanium dioxide technology, applied in the field of black phosphorus@titanium dioxide loaded noble metal composite materials and its preparation, can solve the problems of high cost of noble metals, easy corrosion of carbon carriers, limited reserves, etc., achieve high carrier mobility, easy to solve Oxidation, the effect of good electrocatalytic performance

Active Publication Date: 2021-07-13
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the anode catalysts of alcohol fuel cells are mainly noble metals, but the cost of noble metals is high and the reserves are limited.
Noble metal catalysts have low activity, poor stability, and are easily poisoned by intermediate products. In addition, commercial platinum-carbon catalysts are easy to corrode due to carbon supports.

Method used

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  • A black phosphorus@titanium dioxide loaded noble metal composite material and its preparation method
  • A black phosphorus@titanium dioxide loaded noble metal composite material and its preparation method
  • A black phosphorus@titanium dioxide loaded noble metal composite material and its preparation method

Examples

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Embodiment 1

[0034] A black phosphorus@titanium dioxide loaded noble metal composite material and a preparation method thereof, comprising the following steps:

[0035] (1) Control the temperature at about 5°C, add solid black phosphorus into the N-methyl-2-pyrrolidone organic solvent, and ultrasonically disperse it with an ultrasonic pulverizer (1200W) for 2 hours, then centrifuge at 2000rpm for 20min to obtain the black phosphorus concentration of 2mg·mL -1Black phosphorus dispersion;

[0036] (2) Add 1.44mL tetrabutyl titanate and 20mg sodium dodecylsulfonate to 100mL black phosphorus dispersion in step (1), and stir until tetrabutyl titanate is completely dissolved in black phosphorus dispersion , to obtain a mixed dispersion;

[0037] (3) Transfer the mixed dispersion in step (2) into a polytetrafluoroethylene reactor, and react at 140°C for 12 hours to obtain an aqueous solution of black phosphorus@titanium dioxide composite material;

[0038] (4) Take 10mL of the aqueous solution...

Embodiment 2

[0041] A black phosphorus@titanium dioxide loaded noble metal composite material and a preparation method thereof, comprising the following steps:

[0042] (1) Control the temperature at about 10°C, add a certain mass of solid black phosphorus into the N-methyl-2-pyrrolidone organic solvent, and use an ultrasonic pulverizer (1000W) to ultrasonically disperse for 3 hours. By centrifuging at 1000rpm for 20min, the concentration of black phosphorus was 4mg·mL -1 Black phosphorus dispersion.

[0043] (2) Add 2.44mL tetrabutyl titanate and 10mg sodium dodecyl sulfonate to 100mL black phosphorus dispersion in step (1), and stir until tetrabutyl titanate is completely dissolved in black phosphorus dispersion , to obtain a mixed dispersion;

[0044] (3) Transfer the mixed dispersion in step (2) into a polytetrafluoroethylene reactor, and react at 160°C for 16 hours to obtain an aqueous solution of black phosphorus@titanium dioxide composite material;

[0045] (4) Take 10mL of the a...

Embodiment 3

[0048] A black phosphorus@titanium dioxide loaded noble metal composite material and a preparation method thereof, comprising the following steps:

[0049] (1) Control the temperature at about 5°C, add solid black phosphorus to the N,N-dimethylformamide organic solvent, and ultrasonically disperse it with an ultrasonic pulverizer (1200W) for 2 hours, then centrifuge at 2000rpm for 20 minutes to obtain the concentration of black phosphorus 5mg·mL -1 Black phosphorus dispersion;

[0050] (2) Add 1.44mL tetrabutyl titanate and 20mg cetyltrimethylammonium bromide to 50mL black phosphorus dispersion in step (1), stir until tetrabutyl titanate is completely dissolved in black phosphorus In the dispersion liquid, a mixed dispersion liquid is obtained;

[0051] (3) Transfer the mixed dispersion in step (2) into a polytetrafluoroethylene reactor, and react at 200°C for 12 hours to obtain an aqueous solution of black phosphorus@titanium dioxide composite material;

[0052] (4) Take 1...

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Abstract

The invention discloses a method for preparing a black phosphorus@titanium dioxide loaded noble metal composite material. First mix black phosphorus nanosheets or black phosphorus quantum dots with tetrabutyl titanate, and then add a dispersant to mix black phosphorus and tetrabutyl titanate to form a mixed dispersion; react the mixed dispersion under hydrothermal conditions Finally, the black phosphorus@titanium dioxide composite material is obtained; then the black phosphorus@titanium dioxide composite material is added to the noble metal precursor solution and stirred, then the pH is adjusted to alkaline, and a reducing agent is added to obtain the black phosphorus@titanium dioxide-supported noble metal composite material. The invention has the advantages of simple preparation, cheap and easy-to-obtain raw materials, larger electrochemical active area exposed by precious metals, increased alcohol electrooxidation active sites, greatly improved catalytic activity and stability, and the composite material and preparation method involved in the present invention It provides a new idea for the commercial application of direct alcohol fuel cells, and is suitable for the beneficial effects of large-scale production.

Description

technical field [0001] The invention relates to a noble metal loaded composite material, in particular to a black phosphorus@titanium dioxide loaded noble metal composite material and a preparation method thereof. Background technique [0002] With the depletion of fossil energy and the environmental pollution caused by the consumption of fossil energy, the search for renewable energy has become an important issue for the sustainable development of energy. Due to the advantages of high energy density, environmental friendliness, portability and storage, direct alcohol fuel cells provide a good idea for solving energy and environmental problems. Direct alcohol fuel cells can be widely used in mobile power, portable electronic products and other fields. However, noble metals are currently the main anode catalysts for alcohol fuel cells, but the cost of noble metals is high and their reserves are limited. Noble metal catalysts have low activity, poor stability, and are easily...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/92H01M8/1011
CPCH01M4/8878H01M4/925H01M8/1011Y02E60/50Y02P70/50
Inventor 田蒙奎陈猛段英男安银敏
Owner GUIZHOU UNIV
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