English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Formation of interface and surface oxides on supported Pd nanoparticles

Schalow, T., Brandt, B., Laurin, M., Schauermann, S., Guimond, S., Kuhlenbeck, H., et al. (2006). Formation of interface and surface oxides on supported Pd nanoparticles. Surface science: a journal devoted to the physics and chemistry of interfaces, 600(12), 2528-2542. doi:10.1016/j.susc.2006.04.016.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-0428-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-042A-B
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Schalow, Tobias1, Author              
Brandt, Björn1, Author              
Laurin, Mathias1, Author              
Schauermann, Swetlana1, Author              
Guimond, Sebastien1, Author              
Kuhlenbeck, Helmut1, Author              
Libuda, Jörg1, Author              
Freund, Hans-Joachim1, Author              
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              

Content

show
hide
Free keywords: Palladium; Iron-oxide; Oxidation; Surface oxide; CO; Model catalyst; Molecular beam; IR reflection absorption spectroscopy; Photoelectron spectroscopy
 Abstract: We have quantitatively studied the interaction between oxygen and an Fe3O4-supported Pd model catalyst by molecular beam (MB) methods, time resolved IR reflection absorption spectroscopy (TR-IRAS) and photoelectron spectroscopy (PES) using synchrotron radiation. The well-shaped Pd particles were prepared in situ by metal evaporation and growth under ultrahigh vacuum (UHV) conditions on a well-ordered Fe3O4 film on Pt(1 1 1). It is found that for oxidation temperatures up to 450 K oxygen predominantly chemisorbs on metallic Pd whereas at 500 K and above (10−6 mbar effective oxygen pressure) large amounts of Pd oxide are formed. These Pd oxide species preferentially form a thin layer at the particle/support interface, stabilized by the iron-oxide support. Their formation and reduction is fully reversible. Upon decomposition, oxygen is released which migrates back onto the metallic part of the Pd surface. In consequence, the Pd interface oxide layer acts as an oxygen reservoir, the capacity of which by far exceeds the amount of chemisorbed oxygen on the metallic surface.

Details

show
hide
Language(s): eng - English
 Dates: 2006-06-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Surface science : a journal devoted to the physics and chemistry of interfaces
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 600 (12) Sequence Number: - Start / End Page: 2528 - 2542 Identifier: Other: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028