A New Scanning Tunneling Microscope Reactor Used for High Pressure and High Temperature Catalysis Studies

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We present the design and performance of a home-built high-pressure and high-temperature reactor equipped with a high-resolution scanning tunneling microscope (STM) for catalytic studies. In this design, the STM body, sample, and tip are placed in a small high pressure reactor ({approx}19 cm{sup 3}) located within an ultrahigh vacuum (UHV) chamber. A sealable port on the wall of the reactor separates the high pressure environment in the reactor from the vacuum environment of the STM chamber and permits sample transfer and tip change in UHV. A combination of a sample transfer arm, wobble stick, and sample load-lock system allows fast ... continued below

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Tao, Feng; Tang, David C.; Salmeron, Miquel & Somorjai, Gabor A. May 12, 2008.

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We present the design and performance of a home-built high-pressure and high-temperature reactor equipped with a high-resolution scanning tunneling microscope (STM) for catalytic studies. In this design, the STM body, sample, and tip are placed in a small high pressure reactor ({approx}19 cm{sup 3}) located within an ultrahigh vacuum (UHV) chamber. A sealable port on the wall of the reactor separates the high pressure environment in the reactor from the vacuum environment of the STM chamber and permits sample transfer and tip change in UHV. A combination of a sample transfer arm, wobble stick, and sample load-lock system allows fast transfer of samples and tips between the preparation chamber, high pressure reactor, and ambient environment. This STM reactor can work as a batch or flowing reactor at a pressure range of 10{sup -13} to several bars and a temperature range of 300-700 K. Experiments performed on two samples both in vacuum and in high pressure conditions demonstrate the capability of in situ investigations of heterogeneous catalysis and surface chemistry at atomic resolution at a wide pressure range from UHV to a pressure higher than 1 atm.

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  • Journal Name: Review of Scientific Instruments; Journal Volume: 79; Journal Issue: 8

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  • Report No.: LBNL-1932E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1063/1.2960569 | External Link
  • Office of Scientific & Technical Information Report Number: 960380
  • Archival Resource Key: ark:/67531/metadc926489

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • May 12, 2008

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  • Nov. 13, 2016, 7:26 p.m.

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  • Oct. 2, 2017, 4:25 p.m.

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Tao, Feng; Tang, David C.; Salmeron, Miquel & Somorjai, Gabor A. A New Scanning Tunneling Microscope Reactor Used for High Pressure and High Temperature Catalysis Studies, article, May 12, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc926489/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.