dc.contributor.advisor | Soriaga, M. P. | |
dc.creator | Chen, Xiaole | |
dc.date.accessioned | 2006-04-12T16:03:49Z | |
dc.date.available | 2006-04-12T16:03:49Z | |
dc.date.created | 2004-12 | |
dc.date.issued | 2006-04-12 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/3171 | |
dc.description.abstract | The chemisorption and anodic oxidation of hydroquinone (H2Q) and
benzoquinone (BQ) at palladium electrode surfaces was studied by a combination of
electrochemistry (EC), Auger electron spectroscopy (AES), high-resolution electron-
energy loss spectroscopy (HREELS) and electrochemical-scanning tunneling
microscopy (EC-STM) on a smooth polycrystalline and well-defined (single-crystalline)
Pd(100) electrode surface. The results point to the following more critical conclusions:
(i) Chemisorption of H2Q from dilute (less than or equal to 0.1 mM) aqueous solutions forms surface-
coordinated BQ oriented parallel albeit with a slight tilt. (ii) At high concentrations (greater than or equal to 1mM), chemisorption yields an edge-vertical oriented diphenolic species. (iii) The extent of anodic oxidation of the chemisorbed organic strongly depends upon its initial
orientation; only the flat-adsorbed species are oxidized completely to carbon dioxide.
(iv) The rate of anodic oxidation is likewise dependent upon the initial adsorbate
orientation; the rate for vertically-oriented species is more than twice that of flat-
adsorbed species. (v) The chemisorbed species are not oxidized (to the same extent)
simultaneously; instead, oxidation occurs one molecule at a time. That is, molecules that
survive the anodic oxidation and remain on the surface retain their original identities. | en |
dc.format.extent | 12912578 bytes | en |
dc.format.medium | electronic | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | Texas A&M University | |
dc.subject | Electrochemistry | en |
dc.subject | Surface Science | en |
dc.subject | Chemisorption | en |
dc.subject | HREELS | en |
dc.subject | EC-STM | en |
dc.subject | Pd single crystals | en |
dc.subject | Hydroquinone | en |
dc.title | Chemisorption and anodic oxidation of aromatic molecules on Pd electrode surfaces: studies by UHV-EC-STM | en |
dc.type | Book | en |
dc.type | Thesis | en |
thesis.degree.department | Chemistry | en |
thesis.degree.discipline | Chemistry | en |
thesis.degree.grantor | Texas A&M University | en |
thesis.degree.name | Doctor of Philosophy | en |
thesis.degree.level | Doctoral | en |
dc.contributor.committeeMember | Appleby, A. J. | |
dc.contributor.committeeMember | Goodman, D. W. | |
dc.contributor.committeeMember | Rowe, M.W. | |
dc.type.genre | Electronic Dissertation | en |
dc.type.material | text | en |
dc.format.digitalOrigin | born digital | en |