Characterization and Reactivity of Mo₂C
| dc.contributor.author | St. Clair, Todd P. | en |
| dc.contributor.committeechair | Cox, David F. | en |
| dc.contributor.committeemember | Hochella, Michael F. Jr. | en |
| dc.contributor.committeemember | Dillard, John G. | en |
| dc.contributor.committeemember | Hanson, Brian E. | en |
| dc.contributor.committeemember | Oyama, Shigeo Ted | en |
| dc.contributor.department | Chemical Engineering | en |
| dc.date.accessioned | 2014-03-14T21:23:50Z | en |
| dc.date.adate | 1998-06-23 | en |
| dc.date.available | 2014-03-14T21:23:50Z | en |
| dc.date.issued | 1998-06-04 | en |
| dc.date.rdate | 1999-06-23 | en |
| dc.date.sdate | 1998-06-04 | en |
| dc.description.abstract | Two types of Mo₂C have been investigated: polycrystalline β-Mo₂C and single crystal α-Mo₂C. The β-Mo₂C material was synthesized via a temperature-programmed method, and then characterized using x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), CO chemisorption, and N₂ physisorption. The catalytic activity of the β-Mo₂C was tested for cumene hydrogenation under high pressure conditions, and the effect of sulfur and oxygen poisons on cumene hydrogenation was also investigated. As a complement to the work done on polycrystalline β-Mo₂C, UHV studies of single crystal α-Mo₂C were undertaken to provide fundamental information about a well-characterized Mo₂C surface. The (0001) surface of α-Mo₂C was investigated using XPS and low energy electron diffraction (LEED). It was found that an ion-bombarded surface could be prepared as either Mo-terminated or C-terminated by choosing either low annealing temperatures (~1000 K) or high annealing temperatures (~1500 K), respectively. CO and O₂ adsorption was also studied on α-Mo₂C (0001) using thermal desorption spectroscopy (TDS), XPS, Auger electron spectroscopy (AES), and LEED. Finally, thiophene adsorption was investigated on α-Mo₂C (0001). | en |
| dc.description.degree | Ph. D. | en |
| dc.identifier.other | etd-51898-10285 | en |
| dc.identifier.sourceurl | http://scholar.lib.vt.edu/theses/available/etd-51898-10285/ | en |
| dc.identifier.uri | http://hdl.handle.net/10919/40502 | en |
| dc.publisher | Virginia Tech | en |
| dc.relation.haspart | diss.PDF | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | single crystal molybdenum carbide | en |
| dc.subject | thiophene desulfurization | en |
| dc.title | Characterization and Reactivity of Mo₂C | en |
| dc.type | Dissertation | en |
| thesis.degree.discipline | Chemical Engineering | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | doctoral | en |
| thesis.degree.name | Ph. D. | en |
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