Effect of preparation method on the surface characteristics and activity of the Pd/OMS-2 catalysts for the oxidation of carbon monoxide, toluene, and ethyl acetate

•The framework-structured of cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2) has a 2×2 square tunnel.•Preparation route has an important impact on physicochemical property of the product.•Pd/OMS-2-DP via the deposition-precipitation route shows excellent catalytic activity.•Pd surface loading, surface atomic ratio of Mn ions, lattice oxygen mobility, oxygen vacancy, reducibility and acidity govern activity.