English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Characterization of Platinum and Iridium Oxyhydrate Surface Layers from Platinum and Iridium Foils

Johnson, B., Chinmoy, R., Greiner, M., Arrigo, R., Schuster, M. E., Höpfner, B., et al. (2016). Characterization of Platinum and Iridium Oxyhydrate Surface Layers from Platinum and Iridium Foils. ChemSusChem, 9(13), 1634-1646. doi:10.1002/cssc.201600143.

Item is

Files

show Files
hide Files
:
PtOxOHy-and-IrOxOHy_Paper_Final.pdf (Any fulltext), 20MB
Name:
PtOxOHy-and-IrOxOHy_Paper_Final.pdf
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2016
Copyright Info:
Wiley
License:
-
:
2331772.pdf (Copyright transfer agreement), 890KB
 
File Permalink:
-
Name:
2331772.pdf
Description:
-
OA-Status:
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Johnson, Benjamin1, Author           
Chinmoy, Ranjan2, Author
Greiner, Mark1, Author           
Arrigo, Rosa1, 3, Author           
Schuster, Manfred Erwin1, 4, Author           
Höpfner, Britta5, Author
Gorgoi, Mihaela5, Author
Lauermann, Iver5, Author
Willinger, Marc Georg1, Author           
Knop-Gericke, Axel1, Author           
Schlögl, Robert1, 2, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Müheim an der Ruhr, Germany, ou_persistent22              
3Diamond Light Sourc Ltd., Diamond House, Harwell Science and Innovation Campus Didcot, Oxfordshire OX11, 0DE, UK, ou_persistent22              
4Now Senior Scientist at Johnson Matthey, ou_persistent22              
5Helmholtz Zentrum für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Platinum and iridium polycrystalline foils were oxidized electrochemically through anodization to create thin platinum and iridium hydrous oxide layers, which were analyzed through laboratory photoelectron spectroscopy during heating and time series (temperature-programmed spectroscopy). The films contain oxygen in the form of bound oxides, water, and hydroxides and were investigated by depth profiling with high-energy photoelectron spectroscopy. The Pt films are unstable and begin to degrade immediately after removal from the electrolyte to form core–shell structures with a metallic inner core and a hydrous oxide outer shell almost devoid of Pt. However, evidence was found for metastable intermediate states of degradation; therefore, it may be possible to manufacture PtOx phases with increased stability. Heating the film to even 100 °C causes accelerated degradation, which shows that stoichiometric oxides such as PtO2 or PtO are not the active species in the electrolyte. The Ir films exhibit increased stability and higher surface Ir content, and gentle heating at low temperatures leads to a decrease in defect density. Although both layers are based on noble metals, their surface structures are markedly different. The complexity of such hydrous oxide systems is discussed in detail with the goal of identifying the film composition more precisely.

Details

show
hide
Language(s):
 Dates: 2016-02-012016-07-08
 Publication Status: Published online
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cssc.201600143
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: ChemSusChem
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Weinheim : Wiley-VCH
Pages: 13 Volume / Issue: 9 (13) Sequence Number: - Start / End Page: 1634 - 1646 Identifier: ISSN: 1864-5631
CoNE: https://pure.mpg.de/cone/journals/resource/1864-5631