Document Detail

Determination of the quantum contribution to the activated motion of hydrogen on a metal surface: H/Pt(111).
MedLine Citation:
PMID:  21230789     Owner:  NLM     Status:  In-Process    
Measurements of the atomic-scale motion of H and D atoms on the Pt(111) surface, above the crossover temperature to deep tunneling, are presented. The results indicate that quantum effects are significant up to the highest temperature studied (250 K). The motion is shown to correspond to nearest neighbor hopping diffusion on a well defined fcc (111) lattice. The measurements provide information on the adiabatic potential of both the adsorption site and the transition state and give strong empirical support for a dissipative transition-state theory description of the quantum contribution to the motion.
A P Jardine; E Y M Lee; D J Ward; G Alexandrowicz; H Hedgeland; W Allison; J Ellis; E Pollak
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Publication Detail:
Type:  Journal Article     Date:  2010-09-23
Journal Detail:
Title:  Physical review letters     Volume:  105     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2011-01-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  136101     Citation Subset:  -    
The Cavendish Laboratory, Cambridge, UK.
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