Nobelprize.org
The Nobel Prize in Chemistry 2007
  prevbacknext

Clean exhaust

In the catalysts of cars poisonous carbon monoxide reacts with oxygen to form carbon dioxide before the exhaust is emitted. This reaction takes place on a surface of platinum, for instance. Ertl has shown that the reaction is considerably more complicated than could be expected and in this way demonstrated the strength of his own methodology in surface chemistry. The speed of the reaction varies depending on how much of the surface is covered by carbon monoxide or by oxygen. Sometimes this gives rise to a chaotic process. The circular patterns in the background plate show fields that alternate between being rich in oxygen (dark) and short of oxygen (pale). During the course of the reaction these change constantly.

Contents:
| The Nobel Prize in Chemistry 2007 | Nitrogen | Clean exhaust | Electronics | Timeline | Further Reading | Credits |
Nobel Poster from the Royal Swedish Academy of Sciences, web adapted by Nobel Web AB.


Copyright © Nobel Media AB 2014