Author/Authors :
Lebukhova، نويسنده , , N.V. and Rudnev، نويسنده , , V.S. and Chigrin، نويسنده , , P.G. and Lukiyanchuk، نويسنده , , I.V. and Pugachevsky، نويسنده , , M.A. and Ustinov، نويسنده , , A.Yu. and Kirichenko، نويسنده , , E.A. and Yarovaya، نويسنده , , T.P.، نويسنده ,
Abstract :
The combination of two methods, the plasma electrolytic oxidation (PEO) technique for the oxide film formation on titanium and the extraction-pyrolytic (EP) technique for catalytic active layers coating are suggested to use. After covering with Cu and Mo by equimolar mixture of extracts and subsequent pyrolysis the copper molybdate phase grains with diameter up to 200 nm are observed. Three-fivefold covering leads to the formation of copper molybdate continuous layer. The composition CuMoO4/TiO2 + SiO2/Ti has the most high catalytic ability; after twofold treatment (EP) of oxidized titanium surface, diesel soot oxidation takes place in lower temperature range (the initiation temperature of combustion, Ti = 270 °C) than powder molybdate sample (Ti = 340 °C). In subsurface layer of CuMoO4 (~ 3 nm) the presence of Cu+ and Mo4+ was observed, which can explain the high reactivity of the compositions CuMoO4/TiO2 + SiO2/Ti on initial stage of soot combustion.
