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Ion diaphragm photoelectrolytic cell using solar energy directly decomposing water to make hydrogen

An ion diaphragm and photoelectrolysis technology, applied in the field of photoelectrochemistry, can solve the problems of increased electrolyte voltage drop, poor sealing, and unfavorable solution conduction, etc., and achieve the effect of simple equipment and convenient preparation

Inactive Publication Date: 2007-01-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of partition is not conducive to the conduction of the solution, which increases the voltage drop of the electrolyte; the sealing is not good; the partition has no selectivity for the penetration of the solution, which will lead to the neutralization of acid and alkali

Method used

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  • Ion diaphragm photoelectrolytic cell using solar energy directly decomposing water to make hydrogen
  • Ion diaphragm photoelectrolytic cell using solar energy directly decomposing water to make hydrogen
  • Ion diaphragm photoelectrolytic cell using solar energy directly decomposing water to make hydrogen

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. The semiconductor photoanode material adopts TiO with light corrosion resistance and good chemical stability 2 . Using sol / gel+powder method to convert TiO 2 Fixed on conductive glass surface.

[0023] TiO 2 Sol preparation process: Add appropriate amount of concentrated nitric acid to distilled water, and heat to 70°C with a constant temperature water bath. Take a 1:3 isopropanol: butyl titanate solution and mix it evenly, then slowly add it dropwise into distilled water at constant temperature and stir, and continue to stir at constant temperature for 2 hours to obtain TiO-containing 2 27g / L TiO 2 Sol, sealed and stored. See attached for the process figure 1 .

[0024] TiO 2 Slurry preparation process: take appropriate amount of TiO 2 Sol, adding nano-TiO 2 powder (nano TiO 2 TiO in powder press slurry 2 The total amount is 120g / L (calculated to add), grinding and ultrasonic dispersion to obtain TiO 2 slurry.

[0025] TiO 2 Coating preparation proces...

Embodiment 2

[0035] Embodiment 2: The conditions are the same as in Embodiment 1, and the light source is the sunlight at noon in June in the urban area of ​​Chengdu.

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Abstract

The present invention relates to ion diaphragm photoelectrolytic cell structure used for photoelectricity chemical reaction, to realize no bias directly photolysis water, belonging to photoelectricity chemical technology field. Said photocell structure includes using perfluorocarboxylic acid / sulfonic acid compound ion membrane dividing container into two chambers, one for holding acid solution as acid chamber, another for holding alkali solution as alkaline chamber. Semiconductor photoelectric material is fixed on conductive glass as light anode and put in alkaline chamber, putting hydrogen separated lower overvoltage inertia cathode material in acid chamber as cathode, short-circuit anode and cathode in photoelectrolytic cell working, light radiating to light anode from alkaline chamber sides to generate hydrogen. Said invented photoelectrolytic cell utilizes respectively putting cathode and anode in different pH acid and alkaline liquor to raise both potential differences, realizing no bias direct light solution water.

Description

1. Technical field [0001] The invention relates to an ion diaphragm photoelectrolytic cell structure for photoelectrochemical reaction, which belongs to photoelectrochemical [0002] technology field. 2. Background technology [0003] In 1972, Fujishima and Honda published an article in nature for the first time, describing the semiconductor TiO 2 An electrochemical electrolyzer composed of electrodes, which converts light energy into chemical energy of hydrogen and oxygen through the method of photolysis of water. This kind of photocatalytic water splitting hydrogen production uses solar energy and water to produce hydrogen without by-products and pollution. In addition, compared with photocatalytic hydrogen production, the recombination of electron-hole pairs is reduced, so that the separation efficiency of electron-hole pairs is improved, and hydrogen and oxygen can be obtained at the two poles respectively. [0004] However, in general, the photoanode material cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/10C25B9/00C25B11/00
CPCY02E70/10Y02E60/366Y02P20/133
Inventor 闫康平周菊枚鲁厚芳王伟田间
Owner SICHUAN UNIV
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