Surface Base Sites of MgO Covered with Al 2 O 3 : XANES Analysis of Al and Mg K -edges

Solid bases comprising MgO covered with Al 2 O 3 were prepared by decomposition of Al(OCH(CH 3 ) 2 ) 3 over Mg(OH) 2 in ethyl acetate. Catalysts containing more than 10 mol% Al were insoluble in acetone. Aluminum occupied mainly octahedral sites in the low content range; tetrahedral structure being the principal one in the high range.