Preparation and catalytic performance of monolayer-dispersed Pd/Ni bimetallic catalysts for hydrogenation

Abstract

Pd/Ni bimetallic catalysts were prepared by replacement reactions, characterized by X-ray diffraction, CO chemisorption and H₂ temperature-programmed desorption, and evaluated for hydrogenation of cyclohexene, styrene and acetone. The results show that Pd atoms are monolayer-dispersed on the Ni surface in these Pd/Ni catalysts. Consequently, Pd/Ni catalysts are much more active than Pd/Ni and Pd/?-Al₂O₃ with the same Pd loading prepared by the conventional impregnation method.

References

1. Ponec V Alloycatalysts: the conceptsApplied Catalysis,A: General 2001 222(1–2)3145. doi:10.1016/S0926‐860X(01)00828‐6
2. Li Z X Chen X R Influence of Pt on naphthaleneconversion over nickel-based catalystsChineseJournal of Catalysis 2003 24(4)253258 (in Chinese)
3. Wang J Yu Y B Xie S X He H Catalytic activityof novel noble metal modified Ag/Al₂O₃ for selective catalytic reduction of NO and reactionmechanismChinese Journal of Catalysis 2004 25(10)824828 (in Chinese)
4. Hammer B Norskov J K Theoretical surface scienceand catalysis–calculations and conceptsAdvances in Catalysis 2000 4571129
5. Rodriguez J A Physicaland chemical properties of bimetallic surfacesSurface Science Reports 1996 24(7–8)223287. doi:10.1016/0167‐5729(96)00004‐0
6. Castellani N J Legare P Demangeat C Pick S Hydrogen moleculedissociation on Pt/Ni(111) systemsSurfaceScience 1996 352–354148154. doi:10.1016/0039‐6028(95)01122‐6
7. Hwu H H Eng J Chen J G Ni/Pt(111) bimetallic surfaces: unique chemistry at monolayerNi coverageJournal of the American ChemicalSociety 2002 124(4)702709. doi:10.1021/ja011847d
8. Khan N A Hwu H H Chen J G Low-temperature hydrodesulfurization of thiophene on Ni/Pt(111)bimetallic surfaces with monolayer Ni coverageJournal of Catalysis 2002 205(2)259265. doi:10.1006/jcat.2001.3453
9. Kitchin J R Khan N A Barteau M A Chen J G YakshinskiyB, Madey T E. Elucidation of the active surface and origin of theweak metal-hydrogen bond on Ni/P(111) bimetallic surfaces: a surfacescience and density functional theory study.Surface Science 2003 544(2–3)295308. doi:10.1016/j.susc.2003.09.007
10. Kitchin J R Norskov J K Barteau M A Chen J G Role of strainand ligand effects in the modification of the electronic and chemicalproperties of bimetallic surfacesPhysicalreview letters 2004 93(15)156801. doi: 10.1103/PhysRevLett.93.156801
11. Khan N A Zellner M B Chen J G Cyclohexene as a chemical probe of the low-temperaturehydrogenation activity of Pt/Ni(111) bimetallic surfacesSurface Science 2004 556(2–3)87100. doi:10.1016/j.susc.2004.03.032
12. Khan N A Zellner M B Murillo L E Chen J G A comparisonof similarities and differences in the activities of Pt/Ni(111) andNi/Pt(111) surfacesCatalysis Letters 2004 95(1–2)16. doi:10.1023/B:CATL.0000023713.32104.c4
13. Humbert M D Murillo L E Chen J G in preparation
14. Wang S R Lin W Zhu Y X Xie Y C Chen J G Preparation and catalytic activity of monolayer-dispersedPt/Ni bimetallic catalyst for C=C and C=O hydrogenationChinese Journal of Catalysis 2006 27(4)301330. doi:10.1016/S1872‐2067(06)60018‐1