Alcohol chemistry as a probe of mixed-metal phases: Reactions of 2-propanol on cobalt-covered Mo(110)

Journal of Physical Chemistry

Volumn 100, Issue 44, 1996, Pages 17640-17647

  Chen, D A ^a   Friend, C M ^a  

^a HARVARD UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0039495122     PISSN: 00223654     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp9621989     Document Type: Article

References (70)

1. Sachtler, W. M. H.; Ichikawa, M. J. Phys. Chem. 1986, 90, 4752-4758.
2. Brown, N. F.; Barteau, M. A. Langmuir 1992, 8, 862-869.
3. Harris, S.; Chianelli, R. R. J. Catal. 1986, 98, 17-31.
4. Neiman, D. L.; Koel, B. E. Mater. Res. Soc. Symp. Proc. 1987, 83, 143-153.
5. He, J.; Goodman, D. W. Surf. Sci. 1991, 245, 29-40.
6. Johnson, B. G.; Berlowitz, P. J.; Goodman, D. W. Surf. Sci. 1989, 217, 13-37.
7. Heitzinger, J. M.; Gebhard, S. C.; Koel, B. E. Surf. Sci. 1992, 275, 209-222.
8. Berlowitz, P. J.; Goodman, D. W. Langmuir 1988, 4, 1091-1095.
9. Heitzinger, J. M.; Gebhard, S. C.; Koel, B. E. Chem. Phys. Lett. 1992, 200, 65-70.
10. Heitzinger, J. M.; Gebhard, S. C.; Koel, B. E. J. Phys. Chem. 1993, 97, 5327-5332.
11. Tikhov, M.; Bauer, E. Surf. Sci. 1990, 232, 73-91.
12. He, J.; Kuhn, W. K.; Goodman, D. W. J. Am. Chem. Soc. 1991, 113, 6416-6419.
13. Kuhn, W. K.; He, J.-W.; Goodman, D. W. J. Phys. Chem. 1994, 98, 264-269.
14. Chen, D. A.; Friend, C. M. Surf. Sci., in press.
15. Chen, D. A.; Friend, C. M.; Xu, H. Langmuir 1996, 12, 1528-1534.
16. Uvdal, P.; Wiegand, B. C.; Serafin, J. G.; Friend, C. M. J. Chem. Phys. 1992, 97, 8727-8735.
17. Wiegand, B. C.; Uvdal, P. E.; Serafin, J. G.; Friend, C. M. J. Am. Chem. Soc. 1991, 113, 6686-6687.
18. Johnson, S. W.; Madix, R. J. Surf. Sci. 1982, 115, 61-78.
19. Davis, J. L.; Barteau, M. A. Surf. Sci. 1987, 187, 387-406.
20. Wiegand, B. C.; Uvdal, P.; Serafin, J. G.; Friend, C. M. J. Phys. Chem. 1992, 96, 5063-5069.
21. Xu, X.; Friend, C. M. Surf. Sci. 1992, 260, 14-22.
22. Benziger, J. B.; Madix, R. J. J. Catal. 1980, 65, 36-48.
23. Sault, A. G.; Madix, R. J. J. Phys. Chem. 1988, 92, 6025-6028.
24. Bond strengths are reported for diatomic molecules in the gas phase.
25. 18,21,22
26. CRC Handbook of Chemistry and Physics; CRC Press: Boca Raton, FL, 1989.
27. A monolayer of Co corresponds to the same number of atoms as in the underlying Mo(110) surface.
28. Xu, X.; Friend, C. M. J. Am. Chem. Soc. 1991, 113, 6779-6785.
29. Roberts, J. T.; Friend, C. M. J. Am. Chem. Soc. 1986, 108, 7204-7210.
30. Weldon, M. K.; Uvdal, P.; Friend, C. M.; Serafin, J. G. J. Chem. Phys. 1995, 103, 5075.
31. Weldon, M. K.; Friend, C. M. Surf. Sci. 1994, 310, 95-102.
32. Liu, A. C.; Friend, C. M. Rev. Sci. Instrum. 1986, 57, 1519-1522.
33. 5 (34) The heating was not exactly linear but was highly reproducible. It was 7.8-13.1 K/s for temperatures between 250 and 500 K.
34. 7.
35. The mass spectrometer signals were corrected for mass fragmentation of the various other products by using measured ion ratios. Acetone is the only source of 58 amu signal, and its contribution to the 43 amu signal is derived from the measured 43:58 amu of 4.44. The resulting peak area for 43 amu was entirely accounted for by propane (in the Mo(110) case). The 41 amu peak, which was used to monitor propene, was then corrected for the contribution from acetone (41:58 amu = 0.18) and from propane (41:43 amu = 0.66). The 29 amu signal was corrected for propene fragmentation (29:41 amu = 0.01) and acetone fragmentation (29:58 amu = 0.20). The 28 amu signal was used to monitor CO production, after subtracting the rising base line due to background CO. Corrections for propane (28:29 amu = 0.68), propene (28:41 amu = 0.025), and acetone (28:58 amu = 0.76) were subsequently made.
36. Bridge, M. E.; Comrie, C. M.; Lambert, R. M. Surf. Sci. 1995, 67, 393-404.
37. 5 is not known.
38. 1 was produced since the product 41:42 amu ratio was 1.5, which is the same as an authentic sample of propene in our chamber. Also, the 43:58 amu ratio was 5.5, which is correct for an authentic sample of acetone. Note that deuterium incorporation may not occur simply because deuterium desorbs around 300 K, while propene is not formed until 450 K.
39. Gelius, U.; Heden, P. F.; Hedman, J.; Lindberg, B. J.; Manne, R.; Nordberg, R.; Nordling, C.; Siegbahn, K. Phys. Scr. 1970, 2, 70-80.
40. 45 Auger transition at 538 eV.
41. This calculation assumes that there are no significant changes in the morphology of the Co overlayer occur at 250 K.
42. 16
43. Queeney, K. T.; Arumainayagam, C. R.; Weldon, M. K.; Friend, C. M.; Blumberg, M. Q. J. Am. Chem. Soc. 1996, 118, 3896-3904.
44. 16,71
45. Note that the C-O stretching frequency for CO depends strongly on CO coverage.
46. -1.
47. -1 for a subsaturation exposure on 1 ML of Co. However, the frequencies of the other less intense modes do not change with coverage. This is expected since the extent of dipole-dipole coupling scales with the intensity of the dipole moment.
48. Sexton, B. A.; Rendulic, K. D.; Hughes, A. E. Surf. Sci. 1995, 121, 181-198.
49. Bol, C. W. J. Partial Oxidation of Hydrocarbons on Rh(111). Ph.D. Thesis, Harvard University; 1995.
50. Brainard, R. L.; Madix, R. J. Surf. Sci. 1989, 214, 396-406.
51. Bowker, M.; Madix, R. J. Surf. Sci. 1982, 116, 549-572.
52. Bowker, M.; Madix, R. J. Surf. Sci. 1980, 95, 190-206.
53. Brainard, R. L.; Peterson, C. G.; Madix, R. J. J. Am. Chem. Soc. 1989, 111, 4553-4561.
54. Davis, J. L.; Barteau, M. A. Surf. Sci. 1988, 197, 123-152.
55. Davis, J. L.; Barteau, M. A. Surf. Sci. 1990, 235, 235-248.
56. Bryndza, H. E.; Calabrese, J. C.; Marsi, M.; Roe, D. C.; Tam, W.; Bercaw, J. E. J. Am. Chem. Soc. 1986, 108, 4805-4813.
57. van Asselt, A.; Burger, B. J.; Gibson, V. C.; Bercaw, J. E. J. Am. Chem. Soc. 1986, 108, 5347-5349.
58. Chisholm, M. H.; Tatz, R. J. Organometallics 1986, 5, 1590-1598.
59. Chisholm, M. H.; Eichhorn, B. W.; Folting, K.; Huffman, J. C.; Tatz, R. J. Organometallics 1986, 5, 1599-1606.
60. Papp, H. Surf. Sci. 1985, 149, 460-470.
61. Prior, K. A.; Schwaha, K.; Lambert, R. M. Surf. Sci. 1978, 77, 193-208.
62. Jagannathan, K.; Srinivasan, A.; Hedge, M. S.; Rao, C. N. R. Surf. Sci. 1980, 99, 309-319.
63. Bridge, M. E.; Comrie, C. M.; Lambert, R. M. J. Catal. 1979, 58, 28-33.
64. Papp, H. Surf. Sci. 1983, 129, 205-218.
65. 17 and we are assuming that the selectivity for propene evolution on the mixed Co-Mo sites is not significantly lower.
66. Rodriguez, J. A.; Goodman, D. W. Science 1992, 257, 897-903.
67. Koel, B. E.; Smith, R. J.; Berlowitz, P. J. Surf. Sci. 1990, 231, 325-332.
68. Berlowitz, P. J.; Goodman, D. W. Surf. Sci. 1987, 187, 463-480.
69. Mullins, D. R. Private communication, 1996.
70. Uvdal, P.; MacKerell Jr., A. D.; Wiegand, B. C.; Friend, C. M. Phys. Rev. B 1995, 51, 7844-7848.