The researchers team improved sealed electrolysis technology, developing a coating for an anode, which protects the metal from the harmful effects of chlorine and increases the efficiency of the system.
The essence of the electrolysis is the immersion of two electrodes into water, where, under the action of the electric current, its molecules are disintegrated into hydrogen and oxygen. However, the existing methods of cleavage require the use of purified fluid, since chlorine ions quickly corrupt the metal anode in salt water, sharply reducing its service life. Recently, scientists from Stanford University found a way to solve this problem.
They found that if the anode is coated with layers having negative charges, they will push the chlorine ions and slow down the corrosion of the base metal. The researchers applied the nickel-iron hydroxide over the nickel sulfide covering the none of nickel foam. Nickel foam performs the function of the conductor, and the hydroxide of nickel and iron causes water splitting. In the process of electrolysis, the nickel sulfide becomes in a negatively charged layer that protects the anode.
According to the team, without a protective coating in such conditions, the device will work around 12 hours, and after that it will not remain anything. However, the additional layer increases the system life of more than 1000 hours.
This disappears the need to reduce electric current to slow down corrosion. During testing, scientists carried out through their multilayer device 10 times more electricity than in standard installations, which accelerated splitting and significantly increased the efficiency of the system.
The team also demonstrated the concept eating from solar energy, but it is also suitable for wind generators. Researchers argue that technology can be applied not only to produce hydrogen fuel, but also to create mobile devices for the production of oxygen. For example, so that divers or submarines do not need to rise to the surface to replenish air reserves.
Recently, chemists also improved the reversible proton-ceramic electrochemical element for generating electricity and hydrogen fuel production, which thanks