Ultrahigh-vacuum, high pressure and temperature infrared-ultraviolet-visible spectrophotometer cell

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Abstract
An ir‐uv‐visible spectrophotometer cell for examining gas‐solid interactions at elevated temperatures up to 600°C and high pressures or ultrahigh vacuum has been designed and fabricated. The cell is employed for characterization of reactive catalyst species and reaction intermediates which exist only at conditions above ambient. The pressure maxima are limited by the window material which in turn is determined by the spectral range to be investigated. A compact design out of one piece and large windows permit the use of the cell interchangeably among a variety of commercially available ir and uv‐visible spectrophotometers. The design of the cell has been reported. In addition two specific applications of the cell to high vacuum and high pressures at elevated temperature (200°C) are described.