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Preparation method of photoelectrode loaded with zinc-nickel-cobalt basic carbonate

A carbonate and photoelectrode technology, which is applied in the direction of electrodes, electrolytic components, and electrolytic processes, can solve the problems of high cost, lack of stability, and low hydrogen conversion efficiency, and achieve sufficient raw materials, low prices, and improved photolysis of water. efficiency effect

Active Publication Date: 2019-04-26
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the cost of making semiconductors into photochemical cells is relatively high, and the conversion efficiency of photoelectric water splitting to produce hydrogen is still very low, and some materials with high conversion efficiency are lacking in stability.

Method used

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  • Preparation method of photoelectrode loaded with zinc-nickel-cobalt basic carbonate
  • Preparation method of photoelectrode loaded with zinc-nickel-cobalt basic carbonate
  • Preparation method of photoelectrode loaded with zinc-nickel-cobalt basic carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Clean the FTO conductive glass ultrasonically for 20 minutes in the order of acetone, alcohol and deionized water. Add 1 mL of tetrabutyl titanate and 0.269 g of anhydrous citric acid into a mixed solvent of 30 mL of deionized water and 30 mL of hydrochloric acid (36-38% by mass) and continue stirring until uniformly mixed. Use a pipette gun to measure 10mL of the prepared solution and transfer it to a 20mL stainless steel autoclave lined with polytetrafluoroethylene, place the cleaned FTO conductive glass in the autoclave liner with the conductive surface facing down, and then place it in the autoclave liner. After the autoclave is sealed, place it in an oven, raise the temperature to 150°C in 20 minutes, and react at this temperature for 6 hours. After the reaction is completed and naturally cool to room temperature, take the sample out of the autoclave and clean it with deionized water and alcohol , and then dry the cleaned samples in air at 60°C for 2 hours. In...

Embodiment 2

[0042] Prepare TiO according to the method of embodiment 1 step (1)-(2) 2 / ZNC-CH composite electrode, the difference is that the water bath reaction time in step (2) is 10 minutes.

[0043] The above-prepared photoelectrodes were assembled into photoelectrochemical cells, and then water was split under different voltages. Under the voltage of 1.23V, the photocurrent of the photoelectrode prepared by the method of the present invention can reach 0.898mA / cm 2 ; while TiO 2 The photocurrent of the nanorod array is only 0.336mA / cm 2 , the composite electrode of the present invention is TiO 2 2.7 times that of the electrode photocurrent.

Embodiment 3

[0045] Prepare TiO according to the method of embodiment 1 step (1)-(2) 2 / ZNC-CH composite electrode, the difference is that the water bath reaction time in step (2) is 30 minutes.

[0046] The above-prepared photoelectrodes were assembled into photoelectrochemical cells, and then water was split under different voltages. Under the voltage of 1.23V, the photocurrent of the photoelectrode prepared by the method of the present invention can reach 0.538mA / cm 2 ; while TiO 2 The photocurrent of the nanorod array is only 0.336mA / cm 2 , the composite electrode of the present invention is TiO 2 1.6 times the electrode photocurrent.

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Abstract

The invention relates to a preparation method for a zinc-nickel-cobalt subcarbonate supported photoelectrode. The preparation method comprises the following steps that a layer of titanium oxide nanorod array is formed on the surface of a conductive substrate; zinc organic salt, nickel organic salt, cobalt organic salt and urea are mixed to be uniform in water, and a mixed solution is obtained; and the treated conductive substrate is immersed into the mixed solution, a reaction occurs at the temperature from 60 DEG C to 90 DEG C, and the zinc-nickel-cobalt subcarbonate supported photoelectrode is obtained. According to the preparation method, the process is simple, raw materials are sufficient, the cost is low, mass production is facilitated, and huge potential application value is achieved. According to the semiconductor photoelectrode prepared through the method, the specific area of the photoelectrode is effectively increased, and the area, making sufficient contact with an electrolyte, of the photoelectrode is increased; and meanwhile, compared with a traditional single-semiconductor electrode, the photoelectrode has the beneficial effects that the introduction of a co-catalyst effectively promotes holes and the electrolyte to react, electron hole pair separation is advantageously improved, and the photocatalytic water splitting efficiency is effectively improved.

Description

technical field [0001] The invention relates to the technical field of preparation of photoelectrochemical electrodes, in particular to a preparation method of a photoelectrode loaded with zinc-nickel-cobalt basic carbonate. Background technique [0002] In order to meet the global demand for energy and reduce the emission of polluting gases caused by the combustion of fossil fuels, researchers are trying their best to take various approaches to develop sustainable and clean energy. The solar energy that irradiates the earth every year is 10,000 times the total energy consumption, so the effective use of solar energy is the best way to solve the energy crisis in today's society. Among them, the use of photoelectrochemical cells to split water to produce hydrogen has a good prospect, which can effectively convert solar energy into a storable clean chemical fuel (hydrogen). [0003] However, photo-splitting of water to produce hydrogen still faces many problems. For example, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04C23C18/12B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23C18/1216C25B1/04C25B1/55C25B11/051C25B11/091Y02E60/36
Inventor 李亮田维曹风人
Owner SUZHOU UNIV
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