Adams catalyst Addition reactions, alkenes

The simplest reaction of alkenes is the addition of hydrogen to form alkanes. Hydrogenation is a nonpolar process, unlike many of the addition reactions, to be described later, that involve electrophiles attaching to the nucleophilic n electrons of the alkene. Hydrogenation reactions require catalysts, such as platinum oxide (Adams s catalyst), palladium on carbon (Pd-C), or Raney nickel (Ra-Ni). —, ... 

Addition of hydrogen atoms in the presence of a metal catalyst to double or triple bonds is known as hydrogenation or catalytic hydrogenation. Alkenes and alkynes are reduced to alkanes by the treatment with H2 over a finely divided metal catalyst such as platinum (Pt—C), palladium (Pd—C) or Raney nickel (Ni). The platinum catalyst is also frequently used in the form of Pt02, which is known as Adams s catalyst. The catalytic hydrogenation reaction is a reduction reaction. 

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