On retirement he became a Research Professor (from 1998 to the time of his death).One of his most outstanding early contributions to science ??? described beautifully by him in his Tilden Medal and Prize Lectureship of the Royal Society of Chemistry in 1976 ??? was to demonstrate that, when the diatomic molecule, carbon monoxide, is adsorbed by metals such as iron cobalt, ruthenium or nickel, it d