Table 1 Substrate scope of selective hydrogenation of alkynes and alkynols catalyzed by the hollow PdAg-CeO2 heterodimer NCs catalyst and commercial referencesa.

From: Hollow PdAg-CeO2 heterodimer nanocrystals as highly structured heterogeneous catalysts

#CatalystR1R2Time, hConv, %Sel. A, % (cis %)Sel.B %
1PdAg-CeO2CH3(CH2)5H210092 (2)6
2PdAg-CeO2CH3(CH2)4CH3210095 (96)4
3PdAg-CeO2CH3(CH2)2CH3(CH2)229699 (94)1
4PdAg-CeO2CH3(CH2)2CH3(CH2)2510098 (91)2
5PdAg-CeO2CH3(CH2)2CH3(CH2)22010095 (85)5
6PdAgcCH3(CH2)2CH3(CH2)22013100 (78)0
7CeO2dCH3(CH2)2CH3(CH2)220779 (88)21
8LindlareCH3(CH2)2CH3(CH2)2210098 (86)2
9LindlareCH3(CH2)2CH3(CH2)2510093 (74)7
10LindlareCH3(CH2)2CH3(CH2)22010079 (63)21
11NanoselectfCH3(CH2)2CH3(CH2)221000100
12PdAg-CeO2PhH2748812
13PdAg-CeO2Cy = bH1100964
14PdAg-CeO2PhCH3CH2161382 (97)18
15PdAg-CeO2PhCH2OH166284 (100)16
16PdAg-CeO2(CH2)3OHH110087 (1)12
  1. aReaction conditions: Substrate (0.33 mmol), cat. (0.032 mol% Pd), 5 ml ethanol, 10 bar H2, 50 °C; b1-ethynylcyclohexene; c0.032 mol % Pd vs. 4-octyne; d0.64 mol% CeO2 vs. 4-octyne (nanopowder, 15–30 nm); e0.032 mol % Pd vs. 4-octyne; fPd Nanoselect, LF-200, 0.032 mol % Pd.