What is electrolysis of water for hydrogen production
Hydrogen production by electrolysis of water When direct current is applied to some aqueous electrolyte solutions, the decomposed substances have nothing to do with the original electrolyte. What is decomposed is water as a solvent, and the original electrolyte remains in the water. For example, sulfuric acid, sodium hydroxide, and potassium hydroxide belong to this type of electrolyte.
When electrolyzing water to produce hydrogen, pure water is a typical weak electrolyte due to its low degree of ionization and low conductivity. Therefore, it is necessary to add the aforementioned electrolyte to increase the conductivity of the solution, so that water can be smoothly electrolyzed into hydrogen and oxygen.
Solid polymer electrolytes, SPE electrolyzed water, were originally used to supply oxygen to spacecraft or submarines, or as hydrogen generators in laboratories (which can be used in gas chromatography). After the large-scale development of nuclear power, people use SPE technology to electrolyze water to produce hydrogen during low power consumption periods, and use SPE hydrogen-oxygen fuel cells to supply external power during peak power supply periods, making it an energy storage conversion device.
In recent years, the production of hydrogen by electrolysis of water from renewable energy has shown a rapid development trend internationally. Many countries have begun to set development goals for hydrogen energy in industries such as industry, construction, and electricity outside the transportation field. In terms of government planning, application demonstration, etc. All perform well. In this paper, the analysis and prospect of the electrolytic water hydrogen production technology for preparing green hydrogen is mainly carried out.
Generally speaking, the advantages of using renewable energy to produce hydrogen from water electrolysis are: it can effectively absorb waste wind power and solar energy, and at the same time reduce the cost of hydrogen production; the energy conversion efficiency of electricity into hydrogen is relatively high (60% ~ 80% ); the use of renewable energy to generate electricity and electrolyze water to produce hydrogen is a low-carbon process. The unbalanced development of clean energy has become increasingly prominent, especially the problem of clean energy consumption, which seriously restricts the healthy and sustainable development of the power industry.