An e.s.c.a. study of the dissociative and associative chemisorption of halogeno-alkenes and -alkynes on a Pt(100) surface

Abstract

Quantitative u.h.v.–e.s.c.a. studies of the chemisorption of F₃C-CCH, H₂CCHF, H₂CCF₂, cis-FHCCHF, and F₂CCFCl on a clean Pt(100) surface show that the initial sorption of vinyl fluoride and 1,1-difluoroethylene is dissociative, the chemisorption of trifluoropropyne, cis-1,2-difluoroethylene, and trifluorochloroethylene being associative; a mechanism for the dissociation reaction is suggested.