Schematic drawing (top view) of the HP cell and the connection to the UHV system, illustrating the operating principle.
Cross section (top view) of the high-pressure reaction cell with the manipulator head inserted, including the connecting flange of the gate valve between the high-pressure cell and UHV system.
Cross section of the manipulator head and the sample holder: (a) top view at cut A-A, (b) top view at cut B-B, (c) side view, and (d) front view.
Flow scheme of the gas supply/analysis system with the HP cell, the gas-mixing stage, and the gas analysis unit (V: all metal membrane valve, P: pressure gauge, Cp: capillary, CV: corner valves, FMV: fine meter valves, TP: turbomolecular pump, and RP: rotary pump).
Cross section of the CF16 optical window for IR measurements.
Pressure decrease in the high-pressure cell due to gas diffusion to the differential pumping stages.
production over a model catalyst at 100 °C (both sides of the Ru(0001) sample covered with a film with 0.22 ML Au deposited, 13.4 mbar total pressure, round open symbols), background partial pressure increase over an inert substrate at 100 °C [both sides of the Ru(0001) sample covered with a film, 13.3 mbar total pressure, round filled symbols], and a Au foil at 150 °C (triangular symbols, total pressure of 20 mbars). All measurements were performed in a mixture.
PM-IR spectra recorded on a 1.0 ML -film model catalyst at room temperature in a mixture at increasing total pressures: (a) 0.1 mbar, (b) 0.2 mbar, (c) 0.5 mbar, (d) 1 mbar, (e) 2 mbars, (f) 5 mbars, (g) 10 mbars, (h) 20 mbars, and (i) 50 mbars.
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