Improved instrumentation to carry out surface analysis and to monitor chemical surface reactions in situ on small area catalysts over a wide pressure range (10/sup -8/--10/sup 5/ Torr)
Improved one-tier and two-tier designs for a high-pressure--low-pressure (HPLP) apparatus are described together with some of their recent applications. These instruments are used for surface analysis and in situ monitoring of catalytic reactions on small samples with a geometrical surface area of 1 cm/sup 2/. Catalytic reactions are studied over a wide range of pressures (10/sup -8/--10/sup 5/ Torr) and temperatures (273--1273 K). The apparatus incorporates surface analysis methods such as Electron Spectroscopy for Chemical Analysis (ESCA), High Resolution Electron Energy Loss Spectrometry (HREELS), and /sup 14/C-radiotracer labeling in addition to Low Energy Electron Diffraction (LEED), Auger Electron Spectroscopy (AES), and mass spectrometry. Facilities are also available for argon sputter-ion cleaning, deposition of adsorbates by evaporation, and coverage calibration by means of a thickness monitor.
- Research Organization:
- Materials and Molecular Research Division, Lawrence Berkeley Laboratory and the Department of Chemistry, University of California, Berkeley, California 94720
- OSTI ID:
- 6587476
- Journal Information:
- Rev. Sci. Instrum.; (United States), Vol. 53:12
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHEMICAL REACTIONS
MEASURING INSTRUMENTS
ELECTRON SPECTROSCOPY
MASS SPECTROSCOPY
AUGER ELECTRON SPECTROSCOPY
CALIBRATION
CARBON 14
CATALYSTS
GEOMETRY
HIGH TEMPERATURE
HIGH VACUUM
MEDIUM TEMPERATURE
MONITORING
SIZE
SURFACES
THICKNESS
TRACER TECHNIQUES
VERY HIGH TEMPERATURE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON ISOTOPES
DIMENSIONS
EVEN-EVEN NUCLEI
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICS
NUCLEI
RADIOISOTOPES
SPECTROSCOPY
YEARS LIVING RADIOISOTOPES
440300* - Miscellaneous Instruments- (-1989)
400104 - Spectral Procedures- (-1987)