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Volumn 109, Issue 14, 1998, Pages 6067-6074

Competing pathways for methoxy decomposition on oxygen-covered Mo(110)

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0000493914     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.477232     Document Type: Article
Times cited : (33)

References (59)
  • 15
    • 21944436992 scopus 로고    scopus 로고
    • note
    • Preliminary scanning tunneling microscopy (STM) results indicate some faceting of the Mo(110) surface upon oxidation at high temperatures. (Ref. 55).
  • 22
    • 21944451312 scopus 로고    scopus 로고
    • note
    • When conditions permitted, 1000 scans each for sample and background were collected in one experiment, which is analogous to co-adding two sets of 500 scans.
  • 23
    • 21944451718 scopus 로고    scopus 로고
    • note
    • 3OH on clean Mo(110). The absolute oxygen coverage from methanol reaction on Mo(110) was previously determined via x-ray photoelectron spectroscopy to be ∼0.35 ML (Ref. 34) in a procedure outlined in detail elsewhere (Ref. 14).
  • 26
    • 21944457037 scopus 로고    scopus 로고
    • note
    • This high-coordination site was previously proposed to be the quasi-threefold site (Ref. 24); however, recent density functional calculations indicate that sulfur on Mo(110) resides in a low-symmetry site slightly off-axis from the long bridge site (Ref. 56). Since an exact structural characterization of oxygen overlayers on Mo(110) has not yet been carried out, it is possible that the oxygen in low-symmetry, high-coordination sites resides in a similar off-axis site.
  • 27
    • 21944443446 scopus 로고    scopus 로고
    • note
    • Directed dosing through a stainless steel tube ∼1 cm in diameter, with the surface held ∼5 mm from the end of the tube, was used for dosing of all reagents in this study. Pressures reported correspond to the rise in background pressure and hence do not account for enhanced pressure at the crystal face.
  • 29
    • 21944436278 scopus 로고    scopus 로고
    • note
    • The lack of concomitant intensity in m/e=29 and m/e=27 confirms that this product is CO and not a hydrocarbon (i.e., ethane or ethylene).
  • 30
    • 21944443311 scopus 로고    scopus 로고
    • note
    • 2 sample.
  • 35
    • 21944433309 scopus 로고    scopus 로고
    • note
    • 3OH on clean Mo(110) (Ref. 16).
  • 37
    • 21944451852 scopus 로고    scopus 로고
    • note
    • -1; this feature is observed consistently in our spectra when there is high intensity in the quasi-threefold oxygen stretch.
  • 42
    • 21944440689 scopus 로고    scopus 로고
    • note
    • Mo=O species deposited by NO dissociation on the 0.75-ML overlayer are stable past 700 K (Ref. 57);
  • 43
    • 21944432629 scopus 로고    scopus 로고
    • note
    • Mo=O species on the highly oxidized Mo(110) surface are stable to at least 1200 K (Ref. 58).
  • 54
    • 21944445526 scopus 로고    scopus 로고
    • note
    • The 0.75-ML oxygen overlayer in the ethanol studies was heated to 760 rather than 500 K, causing some migration of surface oxygen to form a small amount of subsurface oxygen.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.