Scanning tunneling microscopy investigations of platinum-covered Ga2O3 thin-film supported catalysts

W. Hanrieder, A. Scholz, H. Meixner

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Scanning tunneling microscopy (STM) recordings of a Pt-covered Ga2O3 thin-film surface are presented for the first time. The investigated system can be regarded as a real supported catalyst. The catalytic activity with respect to the CO oxidation at T = 830 K is verified in a vacuum chamber with the aid of a quadrupole mass spectrometer. Increasing the temperature to T= 1000-1200 K leads to a degradation of the catalytic activity of the Pt/Ga2O3 system. STM recordings of the topography and of the local barrier height, as well as Auger electron spectroscopy, show this to result from a reduction of the effective Pt component at the specimen surface due to droplet growth.

Original languageEnglish
Pages (from-to)166-178
Number of pages13
JournalSurface Science
Volume243
Issue number1-3
DOIs
Publication statusPublished - Feb 2 1991

Fingerprint

Scanning tunneling microscopy
Platinum
Catalyst supports
catalytic activity
scanning tunneling microscopy
Catalyst activity
platinum
recording
catalysts
Thin films
Mass spectrometers
Auger electron spectroscopy
Carbon Monoxide
vacuum chambers
thin films
Topography
mass spectrometers
Auger spectroscopy
electron spectroscopy
topography

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Scanning tunneling microscopy investigations of platinum-covered Ga2O3 thin-film supported catalysts. / Hanrieder, W.; Scholz, A.; Meixner, H.

In: Surface Science, Vol. 243, No. 1-3, 02.02.1991, p. 166-178.

Research output: Contribution to journalArticle

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