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Noble metal loaded nitrogen-doped bacterial cellulose as well as preparation and application thereof

A technology of bacterial cellulose and nitrogen doping, applied in catalyst activation/preparation, electrode, electrolysis process, etc., can solve the problem of high manufacturing cost, and achieve the effect of high economy, high electrocatalytic hydrogen evolution performance, and uniform nitrogen doping

Inactive Publication Date: 2018-07-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although platinum is widely used in electrocatalytic hydrogen evolution materials, it is the most precious metal element and its manufacturing cost is high

Method used

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  • Noble metal loaded nitrogen-doped bacterial cellulose as well as preparation and application thereof
  • Noble metal loaded nitrogen-doped bacterial cellulose as well as preparation and application thereof
  • Noble metal loaded nitrogen-doped bacterial cellulose as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Weigh 10 grams of clean bacterial cellulose and place it in a beaker on average, add 80 milliliters, 1 mole / liter of hydrochloric acid solution to completely immerse the bacterial cellulose, add 50 microliters of aniline while stirring, and continue to react for 24 hours;

[0045] (2) in the beaker of step (1), add 80 milliliters of 1 mol / liter hydrochloric acid solutions that are dissolved with 0.5 gram of ammonium persulfate dropwise, continue to stir for 6 hours;

[0046] (3) the reaction product of step (2) washed the bacterial cellulose after the reaction repeatedly with deionized water and freeze-dried for 24 hours;

[0047] (4) calcining the bacterial cellulose obtained in step (3) for 2 hours under a nitrogen atmosphere of 800 degrees (heating rate 5 degrees / minute), to obtain nitrogen-doped bacterial cellulose;

[0048] (5) Weigh 5 mg of nitrogen-doped bacterial cellulose from step (4) and disperse it in a mixed solution of 1 ml of deionized water and ethan...

Embodiment 2

[0054] (1) Weigh 10 mg of clean bacterial cellulose and place it in a beaker on average, add 80 milliliters, 1 mole / liter of hydrochloric acid solution to completely immerse the bacterial cellulose, add 200 microliters of aniline while stirring, and continue to react for 24 hours;

[0055] (2) in the beaker of step (1), add 80 milliliters of 1 mol / liter hydrochloric acid solutions that are dissolved with 3 grams of ammonium persulfate dropwise, continue to stir for 5 hours;

[0056] (3) the reaction product of step (2) washed the bacterial cellulose after the reaction repeatedly with deionized water and freeze-dried for 24 hours;

[0057] (4) calcining the bacterial cellulose obtained in step (3) for 2 hours under a nitrogen atmosphere of 800 degrees (heating rate 5 degrees / minute), to obtain nitrogen-doped bacterial cellulose;

[0058] (5) Weigh 5 mg of nitrogen-doped bacterial cellulose from step (4) and disperse it in a mixed solution of 1 ml of deionized water and ethanol ...

Embodiment 3

[0064] a) A 0.1 mol / L sulfuric acid solution was passed through nitrogen for 30 minutes and then added to the beaker. The glassy carbon electrode modified with the material was used as the working electrode, the platinum sheet was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode. After connecting the three-electrode system, immerse in the sulfuric acid solution.

[0065] b) Select linear sweep voltammetry, set the start potential to -0.1V, end potential to -0.7V, and scan speed to 5mV s -1 , with a sensitivity of 10 -2 . The hydrogen evolution activity of platinum nanoparticle-supported nitrogen-doped bacterial cellulose electrode in electrolysis of water was investigated by linear sweep voltammetry.

[0066] c) Convert the potential relative to the saturated calomel electrode to that relative to the standard hydrogen electrode using the formula: E RHE =E SCE +0.059pH+0.242V, promptly get the polarization curve (as im...

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Abstract

The invention relates to a preparation method and the application method of noble metal loaded nitrogen-doped bacterial cellulose. The method comprises the following steps: soaking bacterial celluloseinto a hydrochloric acid solution, adding aniline while stirring and performing reaction for several hours; gradually adding hydrochloric acid, in which ammonium persulfate is dissolved, into a beaker dropwise, and stirring; washing the bacterial cellulose after the reaction, and performing freeze drying; calcining the bacterial cellulose into nitrogen for several hours to obtain nitrogen doped bacterial cellulose; dispersing the nitrogen doped bacterial cellulose into a mixed solution of deionized water, ethanol and perfluorosulfonic acid, performing ultrasonic treatment uniformly, drippingon a glassy carbon electrode, and drying at a room temperature to obtain a nitrogen-doped bacterial cellulose modified electrode; depositing the electrode in hydrochloric acid liquid of chloroplatinicacid under constant potential to obtain a platinum nanoparticle loaded nitrogen-doped bacterial cellulose modified electrode; soaking the electrode into a sulfuric acid solution; inspecting the hydrogen evolution activity of the electrode by a linear scanning voltammetry, wherein the result proves that the composite has high electrolytic waster hydrogen evolution performance.

Description

technical field [0001] The invention relates to the technical field of preparation of platinum nanoparticle-loaded nitrogen-doped bacterial cellulose, in particular to noble metal-loaded nitrogen-doped bacterial cellulose, its preparation and application. Background technique [0002] Extensive use of fossil fuels has not only exacerbated the energy crisis, but also produced a large number of environmental problems. As one of the renewable clean energy sources, hydrogen energy is receiving more and more attention. At present, photocatalytic hydrogen production is a relatively common hydrogen production method. The efficiency of photocatalytic hydrogen production is closely related to photocatalytic and electrocatalytic materials. Therefore, it is of great practical and environmental significance to develop efficient and cheap photocatalytic hydrogen evolution materials. [0003] At present, the commonly used electrocatalytic hydrogen evolution materials are mostly noble m...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J35/02B01J37/08B01J37/34C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/24B01J37/08B01J37/348B01J35/394B01J35/393B01J35/33B01J35/00B01J35/30Y02E60/36
Inventor 张娅温芳芳王宏归朱鸣周芝峰谈晶
Owner YANGZHOU UNIV
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