Abstract A series of manganese oxide molecular sieve (OMS) materials has been successfully synthesized. Doping some divalent cations and first row transition metal ions such as Mg 2+, Ni 2+, Cu 2+, Co 2+, and Fe 3+into the framework of OMS materials to form [M]-OMS materials was also done. The catalytic activities of [M]-OMS materials and commercial MnO 2for H 2O 2decomposition were studied. The experimental results show an activity order sequence as follows: most of [M]-OMS materials > commercial MnO 2; [M]-OMS-2 > [M]-OMS-1; and among [M]-OMS-2 samples, [Ni]-OMS-2 > [Cu]-OMS-2 > [Fe]-OMS-2 > [Co]-OMS-2 > [Mg]-OMS-2. The kinetics and a mechanism of H 2O 2catalytic decomposition over [M]-OMS materials were studied and proposed, as well.