Bimetallic Cu-Ag/Al₂O₃ catalysts were prepared for competitive hydrogenation of octanal to octanol, with octene as a competing reactant. These catalysts were prepared using simultaneous and sequential impregnation to determine the promotional effect of silver on the copper catalysts. The increased catalytic performance of the simultaneous impregnated 4.5Cu-0.5Ag/γ-Al₂O₃ (4.5 wt% Cu and 0.5 wt% Ag) catalyst included a higher octene conversion compared to the sequential catalysts which was due to the differences in synergistic copper-silver interaction. The catalysts yielded selectively high octanal and low octene conversions. It was found that under the same operating conditions at 140°C and 50 bar H₂, the sequentially impregnated catalyst, S-0.5Ag-4.5Cu/γ-Al₂O₃ gave a high conversion of 83 %, while maintaining a low octene conversion of 4 mol%, compared to its monometallic counterpart 5Cu (5 wt% Cu/γ-Al₂O₃) which gave 69 % octanal conversion and 3 % octene conversion. Silver, initially used as a reduction promoter, showed to have also played a role as a structural promoter in some catalysts, which improved carbonyl adsorption as shown from the improved preferential selectivity towards octanal conversion compared to the undesired octene conversion.

双金属Cu-Ag/Al ₂ O ₃催化剂被制备用于辛醛竞争性氢化成辛醇，辛烯作为竞争反应物。这些催化剂是使用同时和顺序浸渍来制备的，以确定银对铜催化剂的促进作用。同时浸渍的 4.5Cu-0.5Ag/γ-Al ₂ O ₃（4.5 wt% Cu 和 0.5 wt% Ag）催化剂提高的催化性能包括与顺序催化剂相比更高的辛烯转化率，这是由于协同作用的差异铜银相互作用。催化剂选择性地产生高辛醛和低辛烯转化率。发现在 140°C 和 50 bar H ₂的相同操作条件下中，依次浸渍的催化剂，S-0.5Ag-4.5Cu /γ-Al系₂ ö ₃得到的83％的高转化率，同时保持4摩尔％的低辛烯转化相比较，其单金属配对5Cu（5重量％Cu /γ-Al ₂ O ₃ )，其产生 69% 的辛醛转化率和 3% 的辛烯转化率。最初用作还原促进剂的银在某些催化剂中也起到了结构促进剂的作用，与不希望的辛烯转化相比，银提高了对辛醛转化的优先选择性，从而改善了羰基吸附。