Method for producing hydrogen by electrolyzing water step by step and device thereof

Abstract

The invention discloses a method for producing hydrogen by electrolyzing water step by step and a device thereof. The device comprises an electrolytic bath, a hydrogen evolution catalysis cathode electrode, a nickel hydroxide anode electrode, a hydrogen outlet and an oxygen outlet. Wherein the electrolytic bath does not comprise a diaphragm, and a cavity is formed in the electrolytic bath. The method for producing hydrogen by electrolyzing water comprises the following steps: firstly, switching on an external direct-current power supply of an electrolytic bath, so that water molecules in electrolyte are electrochemically reduced on the surface of a hydrogen evolution catalytic cathode electrode to produce hydrogen, and a Ni (OH)2 anode electrode is electrochemically oxidized into a NiOOH anode electrode; and then, a direct-current power supply outside the electrolytic bath is switched off, high-temperature saturated steam is introduced into the electrolyte of the electrolytic bath, the temperature of the electrolyte is ensured to reach 90-110 DEG C, at the moment, due to the thermodynamic instability of NiOOH, the anode electrode is decomposed and reduced into a Ni (OH)2 electrode, and oxygen is generated around the electrode. The hydrogen and the oxygen are prepared by electrolysis through the two steps, so that the high-purity hydrogen and the high-purity oxygen can be prepared, and the cost of hydrogen production by electrolysis of water can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of electrolyzed water, in particular to a method and device for stepwise electrolyzed water to produce hydrogen. Background technique [0002] Since the beginning of the 21st century, as human society has more and more demands on the quantity and quality of energy, it has become a very urgent task to develop clean, efficient and sustainable new energy power technologies. [0003] At present, human beings mainly rely on fossil fuels such as oil, coal, natural gas, and uranium to obtain energy. However, this traditional energy structure and a large amount of energy consumption have caused serious pollution to the living environment of human beings. With the continuous development of human society and economy, As well as the gradual depletion of traditional fossil energy, more and more human society hopes to use cleaner energy to solve the growing contradiction between economic development, energy shortage and ...

AI Technical Summary

Problems solved by technology

[0013] Based on the above material characteristics of Ni(OH)2 / NiOOH, and at the same time, in order to solve the problems of high cost and low efficiency in hydrogen production by electrolysis of water, the present invention provides a method and device for hydrogen production by electrolysis of water step by step

Images