In 1898 Bredig discovered that it is possible to make colloidal solutions of metals usable as catalysts. Bredig's arc method became the preferred chemical method of creating metallic solutions. He expanded upon this work by studying and comparing the activity of metal colloids and that of inorganic ferments (his name for biological enzymes). In 1899, the Deutsche Elektrochemische Gesellschaft (German Electrochemical Society, founded 1894) awarded an honorary prize to Bredig for his work. Bredig habilitated in Leipzig in 1901, publishing the dissertation Anorganische Fermente (Inorganic ferments). He was granted his teaching licence (venia legendi) after speaking on the topic "Über die Chemie der extremen Temperaturen" ("On the chemistry of extreme temperatures"). In 1901 Bredig married Rosa Fraenkel. The couple had two children, Max Albert Bredig (1902-1977) and Marianne Bredig (1903-1987). Max Albert Bredig also became a chemist, eventually working at Oak Ridge National Laboratory. Marianne Bredig married Dr. Viktor Homburger. Research at Heidelberg and Zurich Also in 1901, Bredig was appointed as associate professor at the University of Heidelberg, the first professor there in physical chemistry. With the support of Theodor Curtius at Heidelberg, Bredig was able to establish his own research program, which led to great progress in catalytic research. One of his achievements at Heidelberg was the first catalytic synthesis of asymmetric carbon compounds, selectively synthesizing specific stereoisomer molecules. In addition to catalysis, his primary areas of research were reaction kinetics and electrochemistry. In addition to his work on organic and inorganic catalysts, he and his students contributed to the areas of kinetics of adiabatic reactions, amphoteric electrolytes and ampholytic ions, and the catalytic decomposition kinetics of ethyl diazoacetate. As a teacher, he attracted many young, talented scientists from all over the world. Among Bredig's students at Heidelberg were Kasimir Fajans, James William McBain, and Andreas von Antropoff. In 1910 Bredig was appointed as full professor at Technische Hochschule, Zurich. Technische Hochschule, Karlsruhe In 1911, Bredig was appointed as professor for physical chemistry at the Technische Hochschule, Karlsruhe. The chair of physical chemistry at Karlsruhe was created in 1900 and held first by Max Le Blanc (1900-1905), and then by Fritz Haber (1905-1911). Haber left to become Headmaster of the newly founded Kaiser Wilhelm Institute for Physical Chemistry and Electrochemistry in Berlin. Haber and Bredig, in spite of great differences in personality and political positions, were good friends. Bredig's students at Karlsruhe included Michael Polanyi. Bredig sent Polyani's