Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: Fritz-Haber-Institut     Collection: Physical Chemistry     Display Documents



  history
ID: 247069.0, Fritz-Haber-Institut / Physical Chemistry
Enhanced reactivity of adsorbed oxygen on Pd(111) induced by compression of the oxygen layer
Authors:Kim, Sang Hoon; Méndez, Javier; Wintterlin, Joost; Ertl, Gerhard
Language:English
Date of Publication (YYYY-MM-DD):2005-10-17
Title of Journal:Physical Review B
Journal Abbrev.:Phys. Rev. B
Volume:72
Issue / Number:15
Start Page:155414–1
End Page:155414–5
Copyright:© 2005 American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The reaction between O atoms and CO molecules on Pd(111) was investigated by scanning tunneling microscopy (STM). CO was dosed on the (2x2)O-covered surface at temperatures between 100 and 190 K, and the structure changes were monitored by STM. CO adsorption causes compression of the (2x2)O overlayer into islands of the (2x1)O structure, followed by reaction of the O atoms to give CO2. The (2x2)O overlayer does not react with CO at temperatures up to 180 K, whereas the (2x1)O phase reacts at temperatures as low as 136 K. The analysis of the reaction kinetics reveals an activation energy for the O+CO reaction of 0.4 eV and a reaction order of 1 with respect to the O coverage.
Free Keywords:palladium; oxygen; carbon compounds; adsorbed layers; adsorption; scanning tunnelling microscopy; solid-state phase transformations; surface reconstruction; island structure; reaction kinetics
External Publication Status:published
Document Type:Article
Communicated by:Gerhard Ertl
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Méndez J, Instituto de Ciencia de Materiales de Madrid CSIC, E-28049 Madrid, Spain; Wintterlin J, Ludwig-Maximilians-Univ Munich, Dept Chem, Munich, D-81377 Germany
Identifiers:URL:http://link.aps.org/abstract/PRB/v72/e155414 [Abstract]
DOI:10.1103/PhysRevB.72.155414
Full Text:
You have privileges to view the following file(s):
e155414.pdf  [460,00 Kb]   
 
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.