NONLINEAR ISLAND GROWTH DYNAMICS IN ADSORBATE-INDUCED RESTRUCTURING OF QUASI-HEXAGONAL RECONSTRUCTED PT(100) BY CO

Authors
HOPKINSON A BRADLEY JM GUO XC KING DA
Citation
A. Hopkinson et al., NONLINEAR ISLAND GROWTH DYNAMICS IN ADSORBATE-INDUCED RESTRUCTURING OF QUASI-HEXAGONAL RECONSTRUCTED PT(100) BY CO, Physical review letters, 71(10), 1993, pp. 1597-1600
Citations number
17
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
10
Year of publication
1993
Pages
1597 - 1600
Database
ISI
SICI code
0031-9007(1993)71:10<1597:NIGDIA>2.0.ZU;2-S
Abstract
We have made the first dynamic measurement of the (1 x 1)-CO island gr owth rate and the simultaneous CO coverage on the quasihexagonal recon structed (hex-R) phase during the CO-induced hex-R--> (1 x 1) phase tr ansformation on Pt{100}. The island growth rate is described by a stro ngly nonlinear power law with respect to the local CO coverage on the hex-R phase at surface temperatures between 380 and 410 K, with an app arent reaction order of 4.5 +/- 0.4. These kinetics manifest themselve s as a strongly flux dependent net sticking probability.