English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Exploring Pd adsorption, diffusion, permeation, and nucleation on bilayer SiO2/Ru as a function of hydroxylation and precursor environment: From UHV to catalyst preparation

Pomp, S., Kaden, W., Sterrer, M., & Freund, H.-J. (2016). Exploring Pd adsorption, diffusion, permeation, and nucleation on bilayer SiO2/Ru as a function of hydroxylation and precursor environment: From UHV to catalyst preparation. Surface Science, 652, 286-293. doi:10.1016/j.susc.2015.12.030.

Item is

Files

show Files
hide Files
:
Pd_SiO2_SurfSci2016.pdf (Any fulltext), 2MB
Name:
Pd_SiO2_SurfSci2016.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2016
Copyright Info:
Elsevier
License:
-
:
PublishingAgreement_Pd-silica_hydrox.pdf (Copyright transfer agreement), 25KB
 
File Permalink:
-
Name:
PublishingAgreement_Pd-silica_hydrox.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Pomp, Sascha1, 2, Author              
Kaden, William1, 3, Author              
Sterrer, Martin1, 2, Author              
Freund, Hans-Joachim1, Author              
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
2Institute of Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, Austria , ou_persistent22              
3Department of Physics, University of Central Florida, 4111 Libra Drive, Physical Sciences Building 308, Orlando, FL 32816, USA , ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: The hydroxylation-dependent permeability of bilayer SiO2 supported on Ru(0001) was investigated by XPS and TDS studies in a temperature range of 100K to 600K. For this, the thermal behavior of Pd evaporated at 100K, which results in surface and sub-surface (Ru-supported) binding arrangements, was examined relative to the extent of pre-hydroxylation. Samples containing only defect-mediated hydroxyls showed no effect on Pd diffusion through the film at low temperature. If, instead, the concentration of strongly bound hydroxyl groups and associated weakly bound water molecules was enriched by an electron-assisted hydroxylation procedure, the probability for Pd diffusion through the film is decreased via a pore-blocking mechanism. Above room temperature, all samples showed similar behavior, reflective of particle nucleation above the film and eventual agglomeration with any metal atoms initially binding beneath the film. When depositing Pd onto the same SiO2/Ru model support via adsorption of [Pd(NH3)4]C2 from alkaline (pH12) precursor solution, we observe notably different adsorption and nucleation mechanisms. The resultant Pd adsorption complexes follow established decomposition pathways to produce model catalyst systems compatible with those created exclusively within UHV despite lacking the ability to penetrate the film due to the increased size of the initial Pd precursor groups.

Details

show
hide
Language(s):
 Dates: 2016-01-062016-10
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.susc.2015.12.030
 Degree: -

Event

show

Legal Case

show

Project information

show hide
Project name : STRUBOLI - Structure and Bonding at Oxide-Liquid Interfaces
Grant ID : 280070
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)

Source 1

show
hide
Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam : Elsevier
Pages: 8 Volume / Issue: 652 Sequence Number: - Start / End Page: 286 - 293 Identifier: Other: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028