Method for separating and preparing hydrogen by decomposing water in fuel cell through photocatalysis

A fuel cell, water splitting technology, used in fuel cells, electrolysis processes, electrolysis components, etc.

Inactive Publication Date: 2010-01-20
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is also limited in practical

Method used

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  • Method for separating and preparing hydrogen by decomposing water in fuel cell through photocatalysis
  • Method for separating and preparing hydrogen by decomposing water in fuel cell through photocatalysis
  • Method for separating and preparing hydrogen by decomposing water in fuel cell through photocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of photoanode

[0032] 3g homemade visible light catalyst (such as: InVO 4 、MBi 2 o 4 (M=Mg, Ca, Sr, Ba), Bi 2 WO 6 ) into the mortar, then add 1ml of 10% acetylacetone in absolute ethanol, grind for 30min; then add 4.5ml of water, 0.1mlTriton X-100 and 30%wt (0.9g) polyethylene glycol (molecular weight 20000) The mixed solution was ground for 30 minutes, and the appropriate concentration was adjusted, and the coating method was used to draw two layers of TiO 2 A visible photocatalyst film was prepared on the FTO glass conductive surface of the film. Use scotch tape (about 40 μm thick) to stick longitudinally on both sides of the FTO conductive glass (6×8cm) that has been drawn, add a certain amount of visible light catalyst slurry prepared by the method described above, and roll coat it with a glass rod to form a film. The film forming effect is the best in one direction, and the film area is about 5×6cm 2 . The thin film electrode was placed in ...

Embodiment 2

[0044] 1. Preparation of photoanode

[0045] 3g homemade TiO 2 Nanomaterials are put into mortar, then add 1ml 10% acetylacetone absolute ethanol solution, grind 30min; Then add 4.5ml water, 0.1mlTriton X-100 and 30%wt (0.9g) polyethylene glycol (molecular weight 20000 ) mixed solution, grind for 30 minutes, adjust the appropriate concentration, and use the coating method to draw two layers of TiO 2 Preparation of TiO on the FTO Glass Conductive Surface of Thin Films 2 film. Use scotch tape (about 40 μm thick) to stick longitudinally on both sides of the FTO conductive glass (6×8cm) that has been drawn, and add a certain amount of TiO prepared by the method described above. 2 Slurry, roll coating with a glass rod to form a film, the best film forming effect in the same direction, the film area is about 5×6cm 2 . The thin film electrode was placed in a muffle furnace, heat treated at 500°C for one hour, and cooled naturally to 80°C for later use.

[0046] 2. Preparation o...

Embodiment 3

[0057] 1. Preparation of photoanode

[0058] 3g homemade TiO 2 Nanomaterials are put into mortar, then add 1ml 10% acetylacetone absolute ethanol solution, grind 30min; Then add 4.5ml water, 0.1mlTriton X-100 and 30%wt (0.9g) polyethylene glycol (molecular weight 20000 ) mixed solution, grind for 30 minutes, adjust the appropriate concentration, and use the coating method to draw two layers of TiO 2 Preparation of TiO on the FTO Glass Conductive Surface of Thin Films 2 film. Use scotch tape (about 40 μm thick) to stick longitudinally on both sides of the FTO conductive glass (6×8cm) that has been drawn, and add a certain amount of TiO prepared by the method described above. 2 Slurry, roll coating with a glass rod to form a film, the best film forming effect in the same direction, the film area is about 5×6cm 2 . The thin film electrode was placed in a muffle furnace, heat treated at 500°C for one hour, and cooled naturally to 80°C for later use.

[0059] 2. Preparation o...

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Abstract

The invention provides a method for separating and preparing hydrogen by decomposing water in a fuel cell through photocatalysis according to the inverse principle of the hydrogen fuel cell, aiming to avoiding the current separation problem of hydrogen and oxygen prepared by decomposing water through solar energy photocatalysis. The method adopts the inverse principle of the hydrogen fuel cell and uses photocatalyst as raw material for a photoanode, and platinum, nickel or carbon electrode as a cathode; an ion film is used between the two electrodes to transfer protons or hydroxyl ions, circuit is formed by connecting the photoanode and the cathode with a lead; sunlight or simulated sunlight is used as a light source, the light directly shines down upon the photoanode; and hydrogen is generated on the cathode and an oxidation reaction is performed on the anode so as to realize the aim of separating and preparing hydrogen by decomposing water through photocatalysis. In the method of the invention, no sacrifice agent or inhibitor is needed to add for adjusting the pH value of the electrolyte solution, an external power source can be added as additional bias so as to directly separate and prepare hydrogen by decomposing water through photocatalysis, and the separation problem of hydrogen and oxygen in practical technology development for decomposing water through solar energy photocatalysis is successfully solved.

Description

technical field [0001] The invention relates to the fields of chemistry, photocatalysis and solar energy utilization technology, in particular to a method for directly separating water and producing hydrogen by a photocatalytic fuel cell. technical background [0002] In 1972, Fujishima discovered the photocatalytic water splitting effect of titanium dioxide. From then on to the early 1980s, photocatalysis was mainly used in the research of hydrogen production from water splitting. Although the hydrogen production rate was improved in the preparation of titanium dioxide / Pt microelectrodes and the addition of biomass, However, due to the low yield of hydrogen, it has not received widespread attention. After more than 30 years of research, the heterogeneous photocatalysis (heterogeneous photocatalysis) technology that uses semiconductor photocatalysis to split water to produce hydrogen has made rapid progress. In 2001, Zou Zhigang, Ye Jinhua, etc. published an article titled ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04
CPCY02E70/10Y02E70/20Y02E60/366Y02E60/36Y02P20/133
Inventor 李新军张玉媛
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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