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Three-electrode system double-electrolytic bath two-step water-electrolytic hydrogen producing device and method

A three-electrode system, double electrolytic cell technology, applied in the field of electrolysis of water, can solve the problem that the effect is not very significant, and achieve the effect of reducing the preparation cost and overcoming the mixing of hydrogen and oxygen

Active Publication Date: 2016-07-06
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although many new diaphragms have been researched and explored, the effect is still not very significant

Method used

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Effect test

Embodiment 1

[0038] Platinum electrodes are used for the catalytic electrodes of the double electrolyzer and three-electrode device to generate hydrogen by electrolysis, iridium oxide is used for the catalytic electrodes to generate oxygen by electrolysis, and commercially available nickel hydroxide electrodes are used as nickel hydroxide electrodes. The area of ​​the three electrodes is 20 square centimeters. The electrolytic solution uses 1 mol / liter of potassium hydroxide solution, and adopts 200 milliampere constant current to carry out electrolysis. First, in the electrolytic cell-1, the cathode is connected to the platinum electrode, and the anode is connected to nickel hydroxide (Ni(OH) 2 ) electrode, 200 mA current electrolysis, the time is 600 seconds, the average voltage is about 1.605V, hydrogen gas is generated on the platinum electrode. Then, the NiOOH electrode formed in the electrolytic cell-1 was transferred to the electrolytic cell-2 for the electrolytic oxygen generation...

Embodiment 2

[0040] Platinum electrodes are used for the catalytic electrodes of the double-electrolyzer three-electrode device to generate hydrogen by electrolysis, the mixed electrodes of CoO and carbon are used for the catalytic electrodes to generate oxygen by electrolysis, and the commercial nickel hydroxide electrodes available on the market are used as the nickel hydroxide electrodes. The area of ​​the three electrodes is 20 square centimeters. The electrolytic solution uses 1 mol / liter of potassium hydroxide solution, and adopts 200 milliampere constant current to carry out electrolysis. First, in the electrolytic cell-1, the cathode is connected to the platinum electrode, and the anode is connected to nickel hydroxide (Ni(OH) 2 ) electrode, 200 mA constant current electrolysis, the electrolysis time is 600 seconds, the average voltage is about 1.605V, and hydrogen gas is generated on the platinum electrode. Then, the NiOOH electrode formed in the electrolytic cell-1 was transferr...

Embodiment 3

[0042] Single-layer MoS is used as the catalytic electrode for the electrolysis of hydrogen in a double-electrolyzer and three-electrode device 2 With the graphene composite electrode, the catalytic electrode for electrolytically generating oxygen uses iridium oxide, and the nickel hydroxide electrode uses a commercial nickel hydroxide electrode that can be purchased in the market. The area of ​​the three electrodes is 20 square centimeters. The electrolytic solution uses a potassium hydroxide solution of 1 mole per liter, and electrolyzes with a constant current of 200 milliamperes. First in electrolyzer-1, the cathode is connected to MoS 2 / graphene composite electrode, the anode is connected to nickel hydroxide (Ni(OH) 2 ) electrode, 200 mA constant current electrolysis, electrolysis time is 600 seconds, the average voltage is about 1.648V, MoS 2 Hydrogen gas is generated on the graphene / graphene composite electrode. Then, the NiOOH electrode formed in the electrolytic ...

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Abstract

The invention belongs to the technical field of water electrolysis and particularly relates to a three-electrode system double-electrolytic bath two-step water-electrolytic hydrogen producing device and method. The electrolysis device comprises two independent electrolytic baths 1 and 2, a hydrogen evolution catalyzing electrode, an oxygen evolution catalyzing electrode, a nickel hydroxide electrode and an alkaline electrolyte. According to the electrolysis device, the water electrolysis process is divided into two steps of hydrogen production and oxygen production which are respectively and alternately carried out in the two electrolytic baths 1 and 2. The device has the advantages that the steps of hydrogen production and oxygen production which are simultaneously generated in conventional water electrolysis can be effectively separated and respectively completed in different electrolytic baths, so that high-purity hydrogen can be produced under the condition of adopting no diaphragm and the water-electrolytic hydrogen producing cost is further reduced.

Description

technical field [0001] The invention belongs to the technical field of electrolyzed water, and in particular relates to a novel device and method for producing hydrogen by electrolyzing water in a two-step two-step method based on a three-electrode system. Background technique [0002] Energy is an important material basis for developing the national economy and improving people's quality of life, an important constraint that directly affects economic development, and one of the foundations for national strategic security. In order to solve the growing contradiction between economic development, energy shortage and environmental pollution, it has become a very urgent task to develop clean, efficient and sustainable new energy power technology. The development of renewable energy and the clean and efficient use of energy will be an important practical issue facing the international community today, and it is of great significance to the sustainable development of the entire w...

Claims

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Application Information

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IPC IPC(8): C25B1/06C25B11/04C25B11/06C25B9/18
CPCC25B1/04C25B11/00C25B11/04C25B9/70C25B11/077Y02E60/36
Inventor 王永刚夏永姚陈龙
Owner FUDAN UNIV
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