The platinum/titanium-nitride interface

X-ray photoelectron spectroscopy studies

Nikola Mati, Gary S. Chottiner, Frank Ernst, Daniel Alberto Scherson

Research output: Contribution to journalArticle

Abstract

The nature of the interactions between Pt and TiN, a material of interest as a support for proton-exchange-membrane (PEM) fuel cell applications, have been examined in ultrahigh vacuum (UHV) using X-ray photoelectron spectroscopy (XPS). For small amounts of Pt, a reaction takes place yielding XPS features consistent with formation of the intermetallic compound PtTi. Increasing the amount of Pt shifts the 4f 72 electron binding energy toward that of metallic Pt. Complementary angle-resolved XPS revealed that Pt remains in the outer surface region of the resulting multicomponent film. The results show that TiN layers with a thickness of only ca. 1 nm already form an effective barrier to Pt diffusion at room temperature.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume15
Issue number6
DOIs
Publication statusPublished - 2012 May 7
Externally publishedYes

Fingerprint

Titanium nitride
titanium nitrides
Platinum
platinum
X ray photoelectron spectroscopy
photoelectron spectroscopy
x rays
Ultrahigh vacuum
Proton exchange membrane fuel cells (PEMFC)
Binding energy
ultrahigh vacuum
fuel cells
Intermetallics
intermetallics
binding energy
membranes
protons
Electrons
shift
room temperature

ASJC Scopus subject areas

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Science(all)
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

The platinum/titanium-nitride interface : X-ray photoelectron spectroscopy studies. / Mati, Nikola; Chottiner, Gary S.; Ernst, Frank; Scherson, Daniel Alberto.

In: Electrochemical and Solid-State Letters, Vol. 15, No. 6, 07.05.2012.

Research output: Contribution to journalArticle

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