Mond's discovery of nickel carbonyl, 1889.
© Science Museum / Science & Society Picture Library
Diorama made by R Broun-Morison. Observations of the corrosion of nickel by gases containing carbon monoxide led to the discovery of nickel carbonyl (NiC4O4). The British-German chemist and industrialist Ludwig Mond recognised this discovery as representing a means of refining nickel, and spent the later years of his life building up the Mond Nickel Company, using ore imported from Canada.