We have installed a new near ambient pressure XPS (AP-XPS) endstation at the X1A1 beamline at the National Synchrotron Light Source. The new system is capable of characterizing materials and interfaces under pressures ranging from ultra high vacuum (UHV) to several Torr at various temperatures. AP-XPS can yield valuable real-time information about the states of a material under different environments, including information about the interfaces between solids, liquids, and gases. We have successfully demonstrated the capability of the system to provide in-situ information by studying the capture of CO2 over a titania-supported alkanolamine under 0.2 Torr of CO2. The CFN’s Reactor-STM was also utilized to provide additional information about the CO2 capture material. We have plans to study the oxidation states and compositions of alloys and model catalysts, in addition to the reactants and products, under various reaction conditions and environments in the near future.
Tenney, S. A.; Rodriguez, A. A.; Chen, D. A.; Monnier, J. R. Design and Use of a Recirculation Loop Reactor System for Catalytic Reaction Studies Attached to an Ultrahigh Vacuum Chamber. Rev. Sci. Instr. to be submitted.
Tenney, S. A.; Cagg, B. A.; Levine, M. S.; He, W.; Manandhar, K.; Chen, D. A. Understanding the Enhanced Activity for Methanol Reaction on Titania-Supported Au Clusters. Surf. Sci. 2012, 606, 1233-1243.
Tenney, S. A.; He, W.; Roberts, C. C.; Ratliff, J. S.; Shah, S. I.; Shafai, G. S.; Turkowski, V.; Rahman, T. S.; Chen, D. A. CO-induced Diffusion of Ni Atoms to the Surface of Ni-Au clusters on TiO2(110). J. Phys. Chem. C. 2011, 115, 11112-11123.
Tenney, S. A.; He, W.; Ratliff, J. S.; Mullins, D. R.; Chen, D. A. Characterization of Pt-Au and Ni-Au Clusters on TiO2(110). Topics in Catalysis. 2011, 54, 42-55.
Tenney, S. A.; Ratliff, J. S.; Roberts, C. C.; He, W.; Ammal, S. C.; Heyden, A.; Chen, D. A. Adsorbate-Induced Changes in the Surface Composition of Bimetallic Clusters: Pt-Au on TiO2(110). J. Phys. Chem. C. 2010, 114, 21652-21663.