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A photocatalytic hydrogen production co-catalyst, photocatalytic system and hydrogen production method

A technology of co-catalyst and photocatalysis, applied in the field of photocatalysis, can solve problems such as reducing catalytic efficiency, and achieve the effect of high hydrogen production efficiency and low cost

Active Publication Date: 2019-07-16
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of nanoparticles, it is usually necessary to add surface stabilizers to control the size and shape of their morphology, but the presence of surface stabilizers will limit the exposure of the active sites of nanoparticles and reduce the catalytic efficiency.

Method used

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  • A photocatalytic hydrogen production co-catalyst, photocatalytic system and hydrogen production method
  • A photocatalytic hydrogen production co-catalyst, photocatalytic system and hydrogen production method
  • A photocatalytic hydrogen production co-catalyst, photocatalytic system and hydrogen production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A method for producing hydrogen by a photocatalytic system using cobalt phosphide as a cocatalyst:

[0076] 1. Disperse 200mg of CdS in 100ml of water, then add an appropriate amount of cobalt nitrate and sodium citrate (the specific amount depends on the need), and then add an excess of sodium hydroxide solution to fully react the cobalt ions to form cobalt hydroxide, and continue stirring 1h, centrifuged to obtain CdS loaded with cobalt hydroxide, 50mg of the aforementioned Co(OH) 2 / CdS hybrid was placed on one end of the quartz boat, and 200 mg of sodium hypophosphite was placed on the other end, and heated at 300 ° C for 1 hour under the protection of argon, and the obtained solid was washed three times with deionized water and ethanol respectively to obtain the original A CoP / CdS junction generated by bit, wherein the CoP mass fraction is 5wt%;

[0077] 2. Add 12 milliliters of water and 3 milliliters of lactic acid to a quartz tube with a total volume of 60 mL, ...

Embodiment 2

[0089] A method for producing hydrogen by a photocatalytic system using cobalt phosphide as a cocatalyst:

[0090] With embodiment 1, with the Na of 15mL 0.5mol / L 2 S-Na 2 SO 3 The mixed water solution replaces 12 ml of water and 3 ml of lactic acid. Figure 10 It is the curve of the hydrogen production volume changing with time in the system of Example 2 during the illumination process. After 10 hours of visible light irradiation, the amount of hydrogen gas produced was about 2263 micromoles.

Embodiment 3

[0092] A method for producing hydrogen by a photocatalytic system using cobalt phosphide as a cocatalyst:

[0093] Same as in Example 1, 12 ml of water and 3 ml of lactic acid were replaced with 15 ml of 0.5 mol / L glycolic acid aqueous solution. Figure 11 It is the curve of the hydrogen production volume changing with time in the system of Example 3 during the illumination process. After 10 hours of visible light irradiation, the amount of hydrogen gas produced was about 2037 micromoles.

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Abstract

The invention discloses a photocatalysis hydrogen production promoter.The promoter is one or a mixture of CoP, Co2P, Fe2P, FeP, Cu3P, ZnP, MoP and MnP.The invention further discloses a photocatalysis system containing the photocatalysis hydrogen production promoter.The photocatalysis system comprises a semiconductor, the promoter, an electronic sacrificial agent and water.The hydrogen production efficiency of the photocatalysis system is extremely high, it is unnecessary to add a surface stabilizer, degassing is not needed, and the photocatalysis system is low in cost and more beneficial for practical application.

Description

technical field [0001] The invention relates to the field of photocatalysis. More specifically, it relates to a photocatalytic hydrogen production co-catalyst, a photocatalytic system and a hydrogen production method. Background technique [0002] With the development of today's society and economy, the existing fossil energy on the earth is far from meeting the growing energy demand of human beings, and the problems of energy shortage and environmental pollution have become increasingly prominent. Photocatalytic water splitting to produce hydrogen is an effective way to solve this problem. Solar energy resources are inexhaustible, if the solar energy is effectively utilized, the fossil energy crisis will be greatly alleviated. Use solar energy to decompose water into hydrogen, and the product of hydrogen combustion is water, which is environmentally friendly, pollution-free and can be recycled. Since the early 1970s, Japanese scientists Fujishima and Honda discovered the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J27/14B01J27/19B01J27/187C01B3/04
CPCY02E60/36
Inventor 陈勇曹爽付文甫
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI