Roger ParsonsFRSCFRS (1926 – 7 January 2017) was a Britishchemist (electrochemist).^[1]

Parsons studied chemistry atImperial College London, obtaining a first class bachelor's degree in 1947. His doctorate, supervised byJohn Bockris, was awarded the following year. In 1951 he was appointed lecturer at the University of St. Andrews in Dundee (nowDundee University), researchingelectrochemical kinetics and thermodynamics underDouglas Hugh Everett. In 1954, Parsons accompanied Everett to theUniversity of Bristol, where he was appointed professor. In 1977 Parsons was appointed Directeur du Laboratoired'Electrochimie Interfaciale (director of the laboratory of interfacial electrochemistry) at theCNRS in France, moving toSouthampton in 1985 before retiring in 1992.^[2]

Parsons served as editor of theJournal of Electroanalytical Chemistry and as president of the Faraday Division of theRoyal Chemical Society.^[2]

His work dealt with kinetics (especially hydrogen evolution in electrolysis),electrocapillarity and adsorption processes, optical methods in interfacial electrochemistry, single crystal electrode processes and theelectrochemical double layer.^[2]

In 1979, he was awarded theOlin Palladium Award by theElectrochemical Society.^[3] Parsons was elected to theRoyal Society in 1980,^[4] and won the society'sDavy Medal in 2003.^[5]