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Sunday, January 8, 2017

Steps in the hydrogenation of a C=C double bond at a catalyst surface, for example Ni or Pt :

(1) The reactants are adsorbed on the catalyst surface and H2 dissociates.
(2) An H atom bonds to one C atom. The other C atom is still attached to the surface.
(3) A second C atom bonds to an H atom. The molecule leaves the surface.