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Volumn 106, Issue 6, 2002, Pages 1229-1238

Synthesis and structure of tetrairidium clusters on TiO2 powder: Characterization by infrared and extended X-ray absorption fine structure spectroscopies

Author keywords

[No Author keywords available]

Indexed keywords

X-RAY ABSORPTION FINE STRUCTURES (EXAFS) SPECTROSCOPIES;

EID: 0037075422     PISSN: 10895647     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp012284v     Document Type: Article
Times cited : (21)

References (70)
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    • 2.
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    • Winick, X., Ye, H., Eds.; Gordon & Breach: Langhorne, PA
    • (b) Lytle, F.W. In Applications of Synchrotron Radiation; Winick, X., Ye, H., Eds.; Gordon & Breach: Langhorne, PA, 1989; p 135.
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    • Lytle, F.W.1
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    • Ph.D. Dissertation, University of Washington
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    • (1996)
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    • U.S. Department of Commerce, National Bureau of Standards and the Joint Committee on Powder Diffraction Standards: Washington, DC
    • Donnay, J.D.H.; Ondik, H.M. Crystal Data Determinative Tables, 3rd ed.; U.S. Department of Commerce, National Bureau of Standards and the Joint Committee on Powder Diffraction Standards: Washington, DC, 1973; Vol. II, p C-88.
    • (1973) Crystal Data Determinative Tables, 3rd ed. , vol.2
    • Donnay, J.D.H.1    Ondik, H.M.2
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    • Dissertation, Eindhoven University of Technology, The Netherlands
    • van Zon, J.B.A.D. Dissertation, Eindhoven University of Technology, The Netherlands, 1988.
    • (1988)
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    • 0011086245 scopus 로고    scopus 로고
    • note
    • The hydroxyl region of the IR spectrum is broad and muted, preventing a satisfactory analysis.
  • 43
    • 0011133974 scopus 로고    scopus 로고
    • note
    • 2) is calculated by a difference file technique. Comparing the Debye-Waller factor of the sample and the reference material allows negative Debye-Waller factor values for samples with higher order than the reference material and positive Debye-Waller factor values for samples less ordered than the reference material.
  • 44
    • 0011133975 scopus 로고    scopus 로고
    • note
    • The distance stated for this contribution may be spuriously short as a consequence of multiple scattering effects that were not taken into account by the reference file used. Since the assignment of this nonbonding shell, which is located far from the absorber (Ir) atom compared to the shells (Ir-Ir and Ir-support) of interest, is tentative and its exact geometry relative to the absorber atom ill-defined, no attempt was made to correct for the influence of multiple scattering.
  • 49
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    • note
    • 2 treatments.
  • 50
    • 0011106306 scopus 로고    scopus 로고
    • note
    • Another possibility is that this Ir-C contribution arises from some hydrocarbon formed during the decarbonylation process.
  • 51
    • 0011080836 scopus 로고    scopus 로고
    • note
    • The aggregation of the clusters on the surface takes place at temperatures much less than the melting temperature of the clusters, estimated roughly as 0.3 × the melting temperature of the bulk iridium, or about 735 °C.
  • 62
    • 0011082564 scopus 로고    scopus 로고
    • note
    • 4, which results in trace chlorides in the oxide. The manufacturer reported Cl concentrations to be less than a few parts per million.
  • 65
    • 0011146285 scopus 로고    scopus 로고
    • note
    • 18, which implies that the clusters occupy about 0.3% of the total surface area, with an average edge-to-edge distance between clusters of roughly 30 Å.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.