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- W2070066037 abstract "Abstract We report on the study of the structural modifications induced in Ru/Al2O3 catalysts by Ge addition and on the changes in the Ru environment upon CO adsorption in monometallic (Ru/Al2O3) and bimetallic (RuMe/Al2O3, Me = Ge, Sn, Pb) samples. Extended X-ray absorption fine structure measurements were performed at the Ge and Ru K-edges. Samples prepared by the controlled surface reaction (CSR) technique and by the classical impregnation method with different Ru loadings and different Ru/Me weight ratios were studied. The results show that germanium is present as oxide even after reduction at high temperatures. Germanium modifies the catalysts in two ways, (i) inducing a greater dispersion of the catalysts and (ii) covering the surface of the ruthenium particles as germanium oxide. The interplay of this two effects can explain the differences in the catalytic properties. The EXAFS study of the catalyst after CO adsorption shows that the Ruδ+ oxide species disappear from the surface of the metallic ruthenium particles explaining why CO adsorption is higher than H2 adsorption." @default.
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- W2070066037 title "EXAFS study of monometallic and bimetallic ruthenium based catalysts: Ge K-edge environment in RuGe/Al2O3 and structural effects of CO adsorption" @default.
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- W2070066037 doi "https://doi.org/10.1016/1381-1169(95)00295-2" @default.
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