The XPS Lab

CEET was the recipient of a NSF-MRI award for acquisition of a new XPS instrument ($322K) that is complemented with an allocation from the DOE EPSCoR Implementation Award ($150K). This allowed replacing the existing instrument with a stateof-the-art one and providing the means to sustain UNM leadership in XPS applications to catalysts and electrocatalysts research.

xps research lab

Figure 3.4: Researchers operating the X-ray photoelectron spectroscopy (XPS) instrument.

The XPS instrument is installed at the Advanced Materials Laboratory (AML) as a beginning of the build up of CEET presence at the UNM Science Technology Park. AXIS-Ultra DLD, Kratos Analytical with a monochromated Al source, high sensitivity, high spectral resolution, mapping and imaging capability.

The high temperature catalyst reaction cell (WX-530) allows for insitu analysis of high temperature (up to 1000oC) catalytic reactions. Systems may be investigated in the reaction cell and then transferred under UHV directly into the XPS analysis chamber thus avoiding contamination. Samples can be returned to the reaction cell after XPS analysis for further studies.

Reactant gases such as H2, O2, H2O, CO2, CH4 are delivered from a series of fine control needle valves into the reaction vessel via the gas entry capillary. This capillary delivers a supply of gas, which is heated to the reaction temperature as it enters the vessel. The cell can be run in a static mode with gas back-filled into the chamber or dynamically, using mass flow controllers to set flow rates. Heating/cooling stage allows temperature controlled experiments such as analysis of phase transitions or degradations studies in the range of T from -150C to +600C.

Surface characterization laboratory serves as cost center where internal and external users have an access to state-ofthe-art surface analysis. Monthly usage is between 100 and 200 hours bringing between $6,000 and $12,000 of income.