“…Delbecq et al indicated that the C=O hydrogenation selectivity in the hydrogenation of α,β-unsaturated aldehydes could be enhanced by the formation of a Pt-Sn alloy because of the higher affinity of the alloy towards C=O rather than towards C=C bonds, as noted previously [19]. Resasco et al have reported that the selective hydrogenation of C=O versus C=C in α,β-unsaturated aldehydes by Pd-Cu alloy supported on silica was caused by the preferential η 2 -coordination of C=O to Pd [20]. In addition, the catalytic reaction over supports (carbon (AC), -Al2O3, Al(OH)3, ZnO, ZrO2, MgO, Li-TN, TiO2, and SiO2) was also carried out under the same reaction condi- --100 -5 0 0 0 13 TiO2 --52 -5 0 0 0 14 ZnO ----3 In order to get insight into the role of support, the catalytic performance of three types of supported Ni3Sn2/TiO2, Ni3Sn2/ZnO, and Ni3Sn2/-Al2O3 alloy catalysts have been evaluated at different reaction temperature, time profile, and loading amount of Ni3Sn2 and the results are shown in Figure 4, 5, and 6, respectively.…”