The conversion of water into oxygen and hydrogen requires external energy.
1. Water electrolysis: This process consumes additional electrical energy. The hydrogen and oxygen obtained by electrolysis are then combined in a chemical reaction. The energy obtained is less than the energy consumed by electrolysis. It’s not worth the gain.
2. Natural energy: Energy that uses the decomposition of water to obtain hydrogen and oxygen must be cheap energy, such as solar energy, wind energy, etc.
3. Photoelectrolysis of water: A thin film composed of an array of automatically arranged and vertically oriented titanium iron oxide nanotubes can decompose water into hydrogen and oxygen under the irradiation of the sun. This new photoelectrolytic water separation technology is inexpensive, less polluting and can be continually improved.
4. Catalyst: Temperaturere only needs to be 800°C. One of the catalysts is iodine. If the temperature is high, it will be 3000°C.
Water is a weak electrolyte and there is an ionization equilibrium within
①H2O=H(+)+OH(-)
< p>②H(+)+ OH(-) =H2Ov①=v②
Under the action of direct current, hydrogen and oxygen are released, and hydrogen and hydroxide ions are not
Water electrolysis machine
The water ionizer continuously decreases, breaks the equilibrium system and continuously ionizes water, and v①>v②, so the reaction continues
Anodic reaction: 4OH (-)-4e (-)=2H2O+O2↑
Cathode reaction: 2H (+)+2e (-)=H2↑
Total reaction: 2H2O = (under tension) 2H2↑+O2↑
Explanation: The molecules of water are composed of hydrogen atoms and oxygen atoms (structure)
After the application of electricity, the water molecules are destroyed and decomposed into hydrogen atoms and oxygen atoms (division)
< p>Two hydrogen atoms form a hydrogen molecule; two oxygen atoms form one (poly) oxygen moleculeMany hydrogen molecules come together to form hydrogen gas. ; many oxygen molecules come together to form oxygen (poly)< /p>
Edit this paragraph Principle of a type of water electrolysis Electrolysis involves placing two metal rods or of carbon (i.e. electrodes) into the substance to be broken down (electrolyte), then connect it to a power source to allow current to pass through the liquid. The cations of the compound move toward the negatively charged electrode (cathode), the anions move toward the positively charged electrode (anode), and the compound is split into two poles.
Process of generating electrolytic water The process of using electricity to break down compounds is called electrolysis.
Water (H2O) is electrolyzedto produce electrolyzed water. When an electric current passes through water (H2O), hydrogen gas is formed at the cathode and oxygen gas is formed at the anode. The positively charged ions move to the cathode and the minerals calcium, magnesium, potassium and sodium dissolve in the water...the positively charged ions form at the cathode, which is the alkaline water we drink and the charged ions negatively; , generated at the anode.
Chlorine added to tap water is also released into the acidic water of the anode. Electrolyzed alkaline water has a pre-filtration system and built-in silver-charged antibacterial activated carbon. When turned off, there are almost no detectable traces of chlorine in alkaline water.
The principle of electrolysis seems simple, but it is not easy to generate electrolyzed water quickly and safely. After continuous improvement, manufacturers began to use safe metal titaniumand stable as electrodes.