A combination of tungsten and zinc oxides on a SnO2 support (W-Zn/SnO2) is a heterogeneous and reusable solid catalyst for selective oxidn. with aq. H2O2. With it, various substrates, such as alkenes, amines, silanes, and sulfides, were oxidized into the corresponding products in high yields. The catalyst can be reused several times without an appreciable loss in catalytic performance. [on SciFinder(R)]