The Adsorption and Surface Reactions of Hydrocarbons on Clean Iridium

One of 130 reports in the series: Ames Laboratory, Iowa State University (IS) available on this site.
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Description

From abstract: "The adsorption of ethane, ethylene and acetylene on clean iridium in a field emission microscope has been found to cause characteristic changes in the work function of the iridium surface. Further changes, which are time and temperature dependent, result when such surfaces are heated. Flash filament experiments have shown that the changes in work function upon heating are due to desorption reactions and that the desorbed product consists principally of hydrogen. By assuming a linear relationship between surface coverage and work function, it has been possible to determine the desorption kinetics from the observed rates of work function … continued below

Physical Description

17 pages, 6 unnumbered pages : illustrations.

Creation Information

Arthur, John R., Jr. & Hansen, Robert S. April 7, 1962.

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Authors

  • Arthur, John R., Jr. Bell Telephone Laboratories, Murray Hill, New Jersey
  • Hansen, Robert S. Institute for Atomic Research and Department of Chemistry, Iowa State University, Ames, Iowa

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  • Ames Laboratory
    Publisher Info: Ames Laboratory, Iowa State University.
    Place of Publication: Ames, Iowa

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Description

From abstract: "The adsorption of ethane, ethylene and acetylene on clean iridium in a field emission microscope has been found to cause characteristic changes in the work function of the iridium surface. Further changes, which are time and temperature dependent, result when such surfaces are heated. Flash filament experiments have shown that the changes in work function upon heating are due to desorption reactions and that the desorbed product consists principally of hydrogen. By assuming a linear relationship between surface coverage and work function, it has been possible to determine the desorption kinetics from the observed rates of work function change at various temperatures. The results are consistent with a mechanism involving stepwise surface dehydrogenation in which a pair of hydrogen atoms is removed from the hydrocarbon molecule in each step, followed by desoption of the adsorbed hydrogen. At very high temperatures the remaining carbon atoms are removed, presumably by evaporation."

Physical Description

17 pages, 6 unnumbered pages : illustrations.

Notes

Digitized from microopaque cards.

"Based in part upon a dissertation submitted by John R. Arthur, Jr. to the Graduate College, Iowa State University of Science and Technology, in partial fulfillment of the requirements for the degree of Doctor of Philosophy, July 1961. Work was performed in part in the Ames Laboratory of the U.S. Atomic Energy Commission."

Includes bibliographical references (page 16).

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  • Report No.: IS-462
  • SuDoc Number: Y 3.At 7:22/IS-462
  • Accession or Local Control No: metadc1201509
  • Archival Resource Key: ark:/67531/metadc1201509

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Creation Date

  • April 7, 1962

Added to The UNT Digital Library

  • Aug. 27, 2019, 3:53 p.m.

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  • April 1, 2020, 3:24 p.m.

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Arthur, John R., Jr. & Hansen, Robert S. The Adsorption and Surface Reactions of Hydrocarbons on Clean Iridium, report, April 7, 1962; Ames, Iowa. (https://digital.library.unt.edu/ark:/67531/metadc1201509/: accessed May 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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