Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (2)
  • 1960-1964
  • 1996  (2)
  • 1
    Electronic Resource
    Electronic Resource
    New model catalysts: uniform platinum cluster arrays produced by electron beam lithography (1996)
    Springer
    Catalysis letters 37 (1996), S. 131-136 
    Details
    ISSN: 1572-879X
    Keywords: electron beam lithography ; ethylene hydrogenation ; model catalyst ; platinum cluster arrays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Platinum particles of 50 nm diameter and 15 run height at 200 nm spacing have been prepared on an oxidized silicon wafer using electron beam lithography. These particles were cleaned of surface carbon with low energy (400 eV) neon ion sputtering. The rate of ethylene hydrogenation over this new model catalyst was measured in a UHV chamber equipped with a high pressure cell for catalytic reaction. Measured turnover numbers are on good agreement with previous work. Atomic force microscopy (AFM) and temperature programmed desorption (TPD) indicate the sample structure remains unaltered by the cleaning and the catalytic reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807743
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Spatially (nanometer) controlled hydrogenation and oxidation of carbonaceous clusters by the platinum tip of a scanning tunneling microscope operating inside a reactor cell (1996)
    Springer
    Catalysis letters 39 (1996), S. 5-17 
    Details
    ISSN: 1572-879X
    Keywords: catalysis ; nanofabrication ; STM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Hydrocarbon clusters formed by the thermal decomposition of propylene on Pt(111) were rehydrogenated or oxidized with nanometer spatial resolution using the platinum tip of a scanning tunneling microscope (STM) at 300 K in atmospheric pressures of H2 or O2. The reaction rate shows a strong dependence on the oxygen or hydrogen pressures and on the tip-surface separation. The reaction stops when the Pt tip becomes contaminated with carbon, after the removal of ∼107–108 carbon atoms, but can be regenerated by removing material from the tip by application of a voltage pulse. Dissociative adsorption of H2 and O2 on the tip, followed by transfer of atoms to the surface is the proposed mechanism of these tip-catalyzed reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00813723
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...