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Volumn 125, Issue 23, 2003, Pages 7107-7115

Role of cluster size in catalysis: Spectroscopic investigation of γ-Al2O3-supported Ir4 and Ir6 during ethene hydrogenation

Author keywords

[No Author keywords available]

Indexed keywords

DISSOCIATIVE ADSORPTION;

EID: 0038242984     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja027741f     Document Type: Article
Times cited : (97)

References (63)
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    • note
    • 3 particles minimized preferential channeling of reactants through the catalyst bed and heat and mass transfer limitations.
  • 9
    • 0038572587 scopus 로고    scopus 로고
    • note
    • Errors were estimated on the basis of results of replicate runs with various samples and account for sample-to-sample variations in the catalyst and imprecision in the product analyses.
  • 11
    • 0037558356 scopus 로고    scopus 로고
    • Ph.D. Dissertation, University of California, Davis
    • Argo, A. M., Ph.D. Dissertation, University of California, Davis, 2001.
    • (2001)
    • Argo, A.M.1
  • 13
    • 0038572588 scopus 로고    scopus 로고
    • Ph.D. Dissertation, University of Washington
    • Ankudinov, A. Ph.D. Dissertation, University of Washington, 1996.
    • (1996)
    • Ankudinov, A.1
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    • Ph.D. Dissertation, Eindhoven University of Technology, The Netherlands
    • van Zon, J. B. A. D., Ph.D. Dissertation, Eindhoven University of Technology, The Netherlands, 1988.
    • (1988)
    • Van Zon, J.B.A.D.1
  • 31
    • 0037558358 scopus 로고    scopus 로고
    • note
    • 3).
  • 32
    • 0037558359 scopus 로고    scopus 로고
    • note
    • 2 in the absence of catalyst under the conditions of the experiments; furthermore, the support alone had no detectable catalytic activity under these conditions.
  • 42
    • 0037558360 scopus 로고    scopus 로고
    • note
    • The lower-frequency mode expected for di-σ-bonded ethane was likely present in our spectra but with too low a signal intensity to be discerned from the noise.
  • 54
    • 0038572590 scopus 로고    scopus 로고
    • note
    • 2 to the reactor was stopped, but the flow of ethene continued. For 1-2 h following the step change, ethane was observed in the product stream in amounts that decreased with time; evidently the hydrogen was supplied from the support during this period.
  • 55
    • 0038572591 scopus 로고    scopus 로고
    • note
    • 3 support itself was not appreciable under our conditions. However. we do not rule out the possibility that some hydrocarbon was present on the support or perhaps bridging the cluster - support interface, and it is also possible that adsorption of ethene on the support could have affected the (reverse) spillover of hydrogen. The whole question of the possibly distinct role of the Ir atoms at the interface with the support remains open and warrants attention.
  • 60
    • 0037896318 scopus 로고    scopus 로고
    • note
    • 10
  • 61
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    • note
    • 10


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.