Thin layers of rust generate electricity.
Thin layers of rust, which is covered with sheets of iron, generate electric energy when the flow through it of salt water. A sheet of iron, coated with a thin layer of rust, an area of 10 m2 can produce several kilowatts of power per hour.
Scientists have discovered an electrokinetic effect that was observed in leaves of iron, covered with ultrathin layer of rust (about 10-30 nm) when the flow through it of the salty water. It is based on ion adsorption and desorption. Due to this effect, thin layers of rust, which is a iron oxideand generate electricity by converting the kinetic energy of the flow of salt water into electricity.
Earlier, a similar effect was observed in films of graphene with the flow on it salty water.
The essence of the effect consists in the following. Salt water contains various ions, which move along with the water. When the flow in the thin layer of rust (about 10-30 nm) ions present in salt water, attract the electrons of iron, under the layer of rust. Due to the action of the force of attraction ions in salt water pulling the iron electrons, generating electric current.
The efficiency of converting the kinetic energy of the flow of salt water in electric is about 30 %.
One square centimeter of a thin layer of rust generates several tens of millivolts and a few microamps of electric energy. Accordingly, the sheet of ironcoated with a thin layer of rust, a 10 m2 can generate several kilowatts of electricity per hour.
This effect can be used as a new method for the production of electricity. For example, you can use the energy of the tides, as well as objects, swaying in the ocean, such as buoys.
Here are the links to the sources:
https://www.caltech.edu/about/news/ultra-thin-layers-rust-generate-electricity-flowing-water ; https://authors.library.caltech.edu/97490/ ; https://www.pnas.org/content/early/2019/07/26/1906601116 ; https://bitcryptonews.ru/news/tech/uchenyie-obnaruzhili-chto-tonkie-sloi-rzhavchinyi-generiruyut-elektrichestvo-ot-tekushhej-vodyi .
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