Bowker, Michael ; Counsell, Jonathan ; El-Abiary, Kareem ; Gilbert, Lee ; Morgan, Chris ; Nagarajan, Sankaranarayanan ; Gopinath, Chinnakonda S. (2010) Carbon dissolution and segregation in Pd(110) Journal of Physical Chemistry C, 114 (11). pp. 5060-5067. ISSN 1932-7447
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp9108046
Related URL: http://dx.doi.org/10.1021/jp9108046
Abstract
The bulk-surface diffusion of carbon in Pd(110) has been investigated using molecular beams to examine the clean-off of carbon with gas-phase oxygen. The dominant product of the reaction above 600 K is CO; CO2 is only produced at much lower temperatures where the lifetime of adsorbed CO is significant. The segregation from the bulk only occurs at a measurable rate at >750 K, while loss of carbon into the bulk can occur at much lower temperatures. The reaction of carbon at high temperatures shows two regimes: (i) a non steady-state evolution of CO due to the clean-off of surface carbon already present on the surface, followed by (ii) a near steady-state reaction due to the continuous diffusion of carbon to the surface.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 81619 |
| Deposited On: | 07 Feb 2012 05:19 |
| Last Modified: | 07 Feb 2012 05:19 |
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