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A self-biased photoelectrochemical cell for solar hydrogen production

A photoelectrochemical battery and self-bias technology, which is applied in the direction of electrical components, can solve the problem of reducing attractiveness, and achieve cost saving, good application prospects, and simple battery structure.

Inactive Publication Date: 2011-12-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the conduction band position of n-type semiconductors is mostly close to the reduction potential of hydrogen, using this n-type single-junction photoelectrochemical cell to photolyze water to produce hydrogen must be carried out under an applied voltage, which makes it a Not really a solar hydrogen production device, which also reduces its attractiveness

Method used

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  • A self-biased photoelectrochemical cell for solar hydrogen production
  • A self-biased photoelectrochemical cell for solar hydrogen production
  • A self-biased photoelectrochemical cell for solar hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A self-biased photoelectrochemical cell for hydrogen production by solar energy is mainly composed of a photoanode 1 with photoelectric response capability, a photocathode 2 with photoelectric response capability, an electrolyte 3 and an external circuit 4 . The photocathode 2 with photoelectric responsiveness is made of p-type gallium phosphide; the photoanode 1 with photoelectric responsiveness is made of n-type silicon; the electrolyte 3 is made of acidic aqueous solution. The external circuit 4 is a conductive path formed by connecting the photoanode 1 with photoelectric response capability and the photocathode 2 with photoelectric response capability with wires.

[0026] The connection relationship of the battery is that the n-type silicon and p-type gallium phosphide are partially immersed in the acidic aqueous solution, and the non-immersed part is connected by a wire to form a conductive path.

[0027] The working process of the battery is that when sunlight irr...

Embodiment 2

[0029] A self-biased photoelectrochemical cell for hydrogen production by solar energy is mainly composed of a photoanode 1 with photoelectric response capability, a photocathode 2 with photoelectric response capability, an electrolyte 3 and an external circuit 4 . The photocathode 2 with photoelectric responsiveness is made of p-type copper indium selenide; the photoanode 1 with photoelectric responsiveness is made of n-type zinc oxide; the electrolyte 3 is made of aqueous solution. The external circuit 4 is a conductive path formed by directly connecting the photoanode 1 with photoelectric response capability and the photocathode 2 with photoelectric response capability.

[0030] The connection relationship of the battery is that part of the n-type zinc oxide and p-type copper indium selenium is immersed in the aqueous solution, and the non-immersed part connects the n-type zinc oxide and the p-type copper indium selenium to form a conductive path.

[0031] The working proce...

Embodiment 3

[0033] A self-biased photoelectrochemical cell for hydrogen production by solar energy is mainly composed of a photoanode 1 with photoelectric response capability, a photocathode 2 with photoelectric response capability, an electrolyte 3 and an external circuit 4 . The material selected for the photocathode 2 with photoelectric response capability is p-type cuprous oxide; the material selected for the photoanode 1 with photoelectric response capability is n-type iron oxide; the material selected for the electrolyte 3 is alkaline aqueous solution. The external circuit 4 is a conductive path formed by connecting the photoanode 1 with photoelectric response capability and the photocathode 2 with photoelectric response capability to the load with wires

[0034] The connection relationship of the battery is that the n-type iron oxide and p-type cuprous oxide are partly immersed in the acidic aqueous solution, and the non-immersed part is connected by a wire to connect the n-type ir...

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Abstract

The invention discloses a self-bias photoelectrochemical cell for solar hydrogen production, and relates to a self-bias photoelectrochemical cell composed of a semiconductor photoelectrode that can truly realize solar energy-electric energy-chemical energy (hydrogen, oxygen) conversion, It belongs to the field of clean and renewable new energy utilization and new material preparation. A self-biased photoelectrochemical cell for hydrogen production by solar energy is composed of a photoanode with photoelectric response capability, a photocathode with photoelectric response capability, electrolyte and an external circuit. The connection relationship is as follows: the photoanode and the photocathode are partially immersed in the electrolyte, and the unimmersed part is connected by an external circuit. Its working process is: when sunlight irradiates the battery, a potential difference is generated between the photoanode and the photocathode, and a photogenerated current can be generated when the external circuit is connected. The invention successfully realizes a photoelectrochemical cell that completely relies on solar energy for energy conversion. The cell has a simple structure, saves cost, is easy to produce on a large scale, and has good application prospects.

Description

technical field [0001] The present invention relates to a self-biased photoelectrochemical cell for solar hydrogen production, in particular to a self-biased photoelectrochemical cell composed of a semiconductor photoelectrode that can truly realize solar energy-electrical energy-chemical energy (hydrogen, oxygen) conversion , which belongs to the field of clean and renewable new energy utilization and new material preparation. Background technique [0002] The greatest challenge to the development of human society today - energy crisis and environmental pollution. After two industrial revolutions in the 19th and 20th centuries, human beings have entered into a modern society with advanced industry and high civilization. However, the rapid development of industrial society has also led to a large amount of energy consumption. According to estimates, the energy system that the world relies on today, that is, fossil energy (including coal, oil, and natural gas) can only last...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M14/00
Inventor 曹传宝郁强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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