When Gold Is Not Noble: Nanoscale Gold Catalysts

Journal of Physical Chemistry A

Volumn 103, Issue 48, 1999, Pages 9573-9578

  Sanchez, A ^a   Abbet, S ^a   Heiz, U ^a   Schneider, W D ^a   Hakkinen H ^b   Barnett, R N ^b   Landman, Uzi ^b  

^a UNIVERSITY OF LAUSANNE   (Switzerland)

^b GEORGIA INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000769907     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp9935992     Document Type: Review

References (31)

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18. 7,11,12 and theoretically the obtained results can be explained by the presence of oxygen-vacancy F-centers (our calculated binding energy of NO to the perfect MgO (100) surface is 0.03 eV and is much higher, by at least an order of magnitude, for adsorption of the molecule in the vicinity of an F-center). Defect-rich films show typically around 1% ML of F-centers (see Figure Id) whereas for the defect-poor films the number of defects is too small (<0.1% ML) to be measured with our experimental setup (see Figure 1e).
19. 16) we found that the values of the activation barriers were increased by no more than 0.1-0.2 eV. Moreover, neither the ordering of the barrier heights, nor any of the conclusions drawn in this study, are affected.
20. 16) we found that the values of the activation barriers were increased by no more than 0.1-0.2 eV. Moreover, neither the ordering of the barrier heights, nor any of the conclusions drawn in this study, are affected.
21. 16) we found that the values of the activation barriers were increased by no more than 0.1-0.2 eV. Moreover, neither the ordering of the barrier heights, nor any of the conclusions drawn in this study, are affected.
22. Barnett, R. N.; Landman, U. Phys. Ret: B 1993, 48, 2081.
23. 8 system all these distances are similar to the above (within 0.06 Å), except for the Au atom marked 5 for which d(5) = 2.20 Å.
24. - (2 ≤ n ≤ 10) clusters ( Salisbury, B. E. Ph.D. Thesis, School of Physics, Georgia Institute of Technology, June 1999).
25. - (2 ≤ n ≤ 10) clusters ( Salisbury, B. E. Ph.D. Thesis, School of Physics, Georgia Institute of Technology, June 1999).
26. 2 product. In this context we remark that from our experience the results shown here do not depend on the heating rate which we used (2 K/s), at least in the range of (2-20) K/s. Additionally, electron-stimulated processes can be safely excluded, as a biased skimmer with an orifice of 3 mm protects the sample from exposure to electrons.
27. 2, and CO oxidation, on Pt (111) see: (a) Eichler, A.; Hafner, J. Phys. Rev. Lett. 1997, 79, 4481; (b) Phys. Rev. B 1999, 59, 5960.
28. 2, and CO oxidation, on Pt (111) see: (a) Eichler, A.; Hafner, J. Phys. Rev. Lett. 1997, 79, 4481; (b) Phys. Rev. B 1999, 59, 5960.
29. 1,20 of CO oxidation on extended surfaces of transition metals and coinage metals (other than gold) which involves dissociation of the adsorbed oxygen molecule prior to reaction.
30. g = 2.94 eV), is hindered by a large activation barrier.
31. 2* molecule at the gold cluster interface for the defect-free MgO (100) surface.