8.6 Hydrogenation: The function of the catalyst Ni Pd or pt R—Hc=CH R—Hc=cH—R 25°C Catalytic hydrogenation(催化氢化) No cat △G(1)>△G(2) △G(2 R-HC=CH-R+H R—CH CH R △H 30 Kcal mol Reaction coordinate8.6 Hydrogenation: The function of the catalyst HC CH + H2 Catalytic hydrogenation (催 化 氢 化 ） R R Cat No cat R CH2 CH2 R H o = - 30kcal mol -1 Reaction coordinate PE G(1) G(2) G(1) G(2) HC CH + H2 Ni, Pd or Pt 25 oC R R R HC CH R