Reduction and Oxidation of Alkenes:

Alkenes to alkanes

 Alkenes are transformed to alkanes through the treatment with hydrogen over a finely divided metal catalyst like palladium, nickel, or platinum shown in figure.

Figure:  Hydrogenation of an alkene.

 This is an addition reaction because it includes the addition of hydrogen atoms to each end of the double bond. It is as well termed as a catalytic hydrogenation or a reduction reaction.