Christian Friedrich Schönbein

Christian Friedrich Schönbein was a German-Swiss chemist who lived from 18 October 1799 to 29 August 1868. He made important discoveries that changed science.

One of his biggest achievements was inventing the fuel cell in 1838. He did this work at the same time as another scientist named William Robert Grove. Fuel cells are special machines that change chemical energy into electricity without burning fuel, and they are still important today.

Schönbein also discovered two powerful substances: guncotton and ozone. Guncotton can burn very quickly and was used in some early explosives, while ozone is a form of oxygen that helps protect the Earth from harmful sunlight.

In addition to these discoveries, Schönbein introduced the idea of geochemistry in 1838. Geochemistry is the study of how chemicals behave in the Earth and its rocks, helping us understand our planet better.

Life

Christian Friedrich Schönbein was born in Metzingen in the Duchy of Württemberg. When he was about 13 years old, he began learning about chemicals and medicines at a company in Böblingen. He studied on his own and later passed a chemistry test given by a professor at Tübingen. After moving around and studying at universities, he joined the University of Basel in 1828 and became a full professor there in 1835. He worked at the university until he passed away in 1868 and was buried in Basel.

Fuel cell

In 1839, Schönbein shared his ideas about the fuel cell in a science journal called "Philosophical Magazine". This was an important step in learning how to create energy from simple materials.

Ozone

While working with water at the University of Basel, Schönbein noticed a special smell in his lab. This smell helped him discover a new gas, which he named "ozone" from a Greek word meaning "to smell." He shared his findings in 1840 and later learned that this same smell is found near lightning storms, showing that ozone is in the air during such events.

Explosives

Schönbein sometimes did experiments at home, even though his wife asked him not to. One day in 1845, while his wife was away, he spilled a mix of nitric acid and sulfuric acid on her cotton apron. When he hung the apron up to dry, it caught fire by itself and burned very fast. This happened because the apron had turned into a special material called nitrocellulose, which can burn quickly and without much smoke.

Schönbein thought this new material could be useful. Unlike old gunpowder, which made a lot of smoke and made it hard to see in battles, nitrocellulose could be a cleaner burning powder. It was later named guncotton. It took many years for scientists to make it safe for use in weapons, but it became an important part of making better explosives.

Legacy

In 1990, a special star-shaped rock in space was named after him.

Selected writings

• The Letters of Faraday and Schönbein 1836-1862 London: Williams & Norgate 1900.