English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Order-Induced Selectivity Increase of Cu60Pd40 in the Semi-Hydrogenation of Acetylene

Friedrich, M., Alarcón Villaseca, S., Szentmiklosi, L., Teschner, D., & Armbrüster, M. (2013). Order-Induced Selectivity Increase of Cu60Pd40 in the Semi-Hydrogenation of Acetylene. Materials, 6(7), 2958-2977. doi:10.3390/ma6072958.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1E8A-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-9568-F
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Friedrich, Matthias1, Author              
Alarcón Villaseca, S.1, Author              
Szentmiklosi, L., Author
Teschner, D., Author
Armbrüster, M.2, Author              
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Marc Armbrüster, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863414              

Content

show
hide
Free keywords: -
 Abstract: The two structural modifications of Cu60Pd40 were synthesized as bulk powders and tested as unsupported model catalysts in the semi-hydrogenation of acetylene. The partly ordered low-temperature modification (CsCl type of structure) showed an outstanding ethylene selectivity of >90% over 20 h on stream while the disordered high-temperature modification (Cu type of structure) was 20% less selective, indicating an influence of the degree of order in the crystal structure on the catalytic properties. The results are supported by XRD and in situ XPS experiments. The latter suggest the existence of partly isolated Pd sites on the surface. In situ PGAA investigations proved the absence of metal hydride formation during reaction. Quantum chemical calculations of the electronic structure of both modifications using the CPA-FPLO framework revealed significant differences in their respective density of states, thus still leaving open the question of whether the degree of structural order or/and the electronic hybridization is the decisive factor for the observed difference in selectivity.

Details

show
hide
Language(s): eng - English
 Dates: 2013-07-23
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 670762
ISI: 000322168300020
DOI: 10.3390/ma6072958
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Materials
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 6 (7) Sequence Number: - Start / End Page: 2958 - 2977 Identifier: ISSN: 1996-1944