Gerhard Ertl wins the Nobel in chemistry

The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in chemistry for 2007 to Gerhard Ertl 'for his studies of chemical processes on solid surfaces.'

Gerhard Ertl is German, born 1936 in Bad Cannstadt; PhD in physical chemistry 1965, from Technische Universitaet Muenchen, Germany; Professor Emeritus at Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany.

The Nobel Prize in chemistry for 2007 is awarded for groundbreaking studies in surface chemistry. This science is important for the chemical industry and can help us to understand such varied processes as why iron rusts, how fuel cells function and how the catalysts in our cars work. Chemical reactions on catalytic surfaces play a vital role in many industrial operations, such as the production of artificial fertilisers. Surface chemistry can even explain the destruction of the ozone layer, as vital steps in the reaction actually take place on the surfaces of small crystals of ice in the stratosphere. The semiconductor industry is yet another area that depends on knowledge of surface chemistry.

It was thanks to processes developed in the semiconductor industry that the modern science of surface chemistry began to emerge in the 1960s. Gerhard Ertl was one of the first to see the potential of these new techniques. Step by step he has created a methodology for surface chemistry by demonstrating how different experimental procedures can be used to provide a complete picture of a surface reaction. This science requires advanced high-vacuum experimental equipment as the aim is to observe how individual layers of atoms and molecules behave on the extremely pure surface of a metal, for instance. It must therefore be possible to determine exactly which element is admitted to the system. Contamination could jeopardise all the measurements. Acquiring a complete picture of the reaction requires great precision and a combination of many different experimental techniques.

Gerhard Ertl has founded an experimental school of thought by showing how reliable results can be attained in this difficult area of research. His insights have provided the scientific basis of modern surface chemistry: his methodology is used in both academic research and the industrial development of chemical processes. The approach developed by Ertl is based not least on his studies of the Haber-Bosch process, in which nitrogen is extracted from the air for inclusion in artificial fertilisers. This reaction, which functions using an iron surface as its catalyst, has enormous economic significance because the availability of nitrogen for growing plants is often restricted. Ertl has also studied the oxidation of carbon monoxide on platinum, a reaction that takes place in the catalyst of cars to clean exhaust emissions.

Last year, the Nobel Prize in chemistry went to Roger David Kornberg, an American biochemist and professor of structural biology at Stanford University School of Medicine, 'for his studies of the molecular basis of eukaryotic transcription.'

The Nobel Prizes are awarded for physics, chemistry, physiology or medicine, literature, peace, and economics. The first five prizes were instituted by the Swedish scientist Alfred Nobel through his will in 1895. With the exception of the peace prize, which is handed out in Oslo, they are all handed out in Stockholm at an annual ceremony on 10 December.