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The composition and structure of trinary mixed oxidesLita_(1-x)Ti_xO_2as well as catalytic behavior in the methane oxidative coupling(MOC) have been studied by means of XRD,IR,SEM,XPS and so on.Itwas found that in the series of oxides LiLa_(1-x)Ti_xO_2, as the x value changed,thephases of La_2O_3,LaTi_(1-y)Li_yO_(3-λ),Li_2TiO_3,La_(0.66)TiO_(2.993) and Li_(1.33)Ti(1.66)O_4 wereformed.Among them the complex oxide LaTi_(1-y)Li_yO_(3-λ) was the active phasefor methane oxidative coupling,resulted from the formation of active site Li~+-O~--Ti~(3+) in this phase,and La_(0.66)-TiO_(2.993) and Li_2TiO_3 were active for deep oxi-dation,while Li_(1.33)Ti_(l.66)O_4 was not active for both methane oxidative couplingand deep oxidation.
The composition and structure of trinary mixed oxides Lita_ (1-x) Ti_xO_2 as well as catalytic behavior in the methane oxidative coupling (MOC) have been studied by means of XRD, IR, SEM, XPS and so on. Itwas found that in the series of oxides LiLa_ (1-x) Ti_xO_2, as the x value changed, thephases of La_2O_3, LaTi_ (1-y) Li_yO_ (3-λ), Li_2TiO_3, La_ (0.66) TiO_ (2.993) and Li_ (1.33) Ti (3-λ) was the active phase for methane oxidative coupling, resulting from the formation of active site Li ~ + -O ~ -Ti ~ (3+). O_4 was formed. Amm them the complex oxide LaTi_ (1-y) Li_yO_ in this phase, and La_ (0.66) -TiO_ (2.993) and Li_2TiO_3 were active for deep oxi-dation, while Li_ (1.33) Ti_ (1.66) O_4 was not active for both methane oxidative coupling and deep oxidation.