Electrochemistry is the branch of physical chemistry concerned with the relationship between electrical potential difference and identifiable chemical change. These reactions involve electrons moving via an electronically-conducting phase between electrodes separated by an ionically conducting and electronically insulating electrolyte.
English chemist John Daniell (left) and physicist Michael Faraday (right), both credited as founders of electrochemistry.
Sir Humphry Davy's portrait in the 19th century.
Swedish chemist Svante Arrhenius portrait circa 1880s.
German scientist Walther Nernst portrait in the 1910s.
Physical chemistry is the study of macroscopic and microscopic phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibria.
Between the flame and the flower is aerogel, whose synthesis has been aided greatly by physical chemistry.
Fragment of M. Lomonosov's manuscript 'Physical Chemistry' (1752)