Development program for [sup 238]Pu aqueous recovery process

σ-Bond Metathesis on a Surface: Dehydrogenation of Cyclohexane on Hydrogen-Saturated Pt(111)

“…Three separate ion-pumped vacuum chambers with base pressures of 1 × 10 -10 Torr were used to obtain the spectra. [15][16][17] Figure 1 shows the vibrational (HREELS) spectra of cyclohexane adsorption on Pt(111) at 135 K for a 0.5 L (1 L ) 1 × 10 -6 Torr‚s) exposure of cyclohexane (Figure 1a) and a 200 L D 2 exposure followed by a 0.5 L exposure of cyclohexane (Figure 1b). These spectra were obtained using an LK 2000 HREELS spectrometer.…”

“…UHV surface techniques used in this work to characterize the H/C 6 H 12 /Pt(111) system include Auger electron spectroscopy (AES) to obtain elemental composition, high-resolution electron energy loss spectroscopy (HREELS) for vibrational studies, thermal desorption spectroscopy (TDS) to monitor desorption products, work function measurements (retarding field method 14 ), and laser induced thermal desorption-Fourier transform mass spectrometry (LITD-FTMS) to determine the molecular composition of the adsorbed species. Three separate ion-pumped vacuum chambers with base pressures of 1 × 10 -10 Torr were used to obtain the spectra. − …”