from first principles PP-I-1

PP-III-61Binary Oxides of Transition Metals on Aluminum and Titaniumin CO OxidationLukiyanchuk I.V. 1 Chernykh I.V. 1 , Rudnev V.S. 1,2 , Tyrina L.M. 1 , Ustinov A.Yu. 1,21 Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences, Vladivostok690022, Russia2 Far Eastern Federal University, Vladivostok, Russialukiyanchuk@ich.dvo.ruThe composites with binary oxides of transition metals on aluminum and titanium have beenobtained using combination of plasma electrolytic oxidation (PEO) technique andimpregnation in nitrate solutions following by air calcination. The general composite formulais CuO+M x O y /PEO-layer/Ti(Al), where M x O y is oxide of transition metal (Mn, Fe, Co, Ni).Solutions of Zr(SO 4 ) 2 and of Zr(SO 4 ) 2 +Ce 2 (SO 4 ) 3 as well as of Na 2 SiO 3 +NaOH have beenused for PEO treatment of titanium and only the last have done for treatment of aluminum.The composites have been investigated by XRD, XSA, SEM and XPS. Catalytic tests inoxidation of CO into CO 2 showed that both metal support and PEO layer effected catalyticactivity of the composites. It has been demonstrated that all the composites containing binarytransition metal oxides were active in the oxidation of CO into CO 2 at temperatures above150-250°C. The attempts have been done to relate catalytic properties of the composites withtheir composition and surface morphology.The comparative analysis of the resulting composites showed, that binary oxides of copperand cobalt deposited on silicate PEO coatings on titanium are more perspective catalyticsystems for further research. Activation energy E a was evaluated for theCuO+Co x O y /SiO 2 +TiO 2 /Ti composite and the SiO 2 +TiO 2 /Ti sample from the dependences1 and 2 (Fig.). In the case of Co-, Cu-containing coatings E a =98.7 kJ/mol and forSiO 2 +TiO 2 /Ti composites E a =42.5 kJ/mol in kinetic region.Fig. The dependences of the catalytic activity W (ml/g·c) in COoxidation on an inverse temperature T for SiO 2 +TiO 2 /Ti (1) andCuO+Co 3 O 4 /SiO 2 +TiO 2 /Ti (2) composites215