Hydrogenation of chemisorbed ethylene on clean, hydrogen, and ethylidyne covered platinum (111) crystal surfaces
نویسندگان
چکیده
منابع مشابه
The adsorption of ethylene on ethylidyne-covered Pd(111)
Reflection absorption infrared spectroscopy shows that ethylene adsorbs on ethylidyne-saturated Pd(1 1 1) ðHsatðCH3–CBÞ 1⁄4 0:25Þ at 80 K exhibiting a feature at 1100 cm , assigned to di-r-bonded ethylene adsorbed on the palladium surface. Since adsorbed ethylidyne also has a vibrational mode at 1090 cm , the assignment of the 1100 cm 1 mode to adsorbed ethylene was confirmed by adsorbing it on...
متن کاملX-ray photoemission analysis of clean and carbon monoxide-chemisorbed platinum(111) stepped surfaces using a curved crystal
Surface chemistry and catalysis studies could significantly gain from the systematic variation of surface active sites, tested under the very same conditions. Curved crystals are excellent platforms to perform such systematics, which may in turn allow to better resolve fundamental properties and reveal new phenomena. This is demonstrated here for the carbon monoxide/platinum system. We curve a ...
متن کاملHydrogen evolution on Au(111) covered with submonolayers of Pd
Mårten E. Björketun,1,* Gustav S. Karlberg,1 Jan Rossmeisl,1 Ib Chorkendorff,2 Holger Wolfschmidt,3 Ulrich Stimming,3 and Jens K. Nørskov1,4 1Center for Atomic-scale Materials Design, Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark 2Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark 3D...
متن کاملDetermination of the structure of disordered overlayers of ethylene on clean and hydrogen-covered Pdð111Þ by low-energy electron diffraction
The surface structure of the disordered overlayer formed by ethylene adsorption on Pdð111Þ at 80 K is determined by low-energy electron diffraction (LEED) from the effects of chemisorbed molecules on the intensity versus beam energy ðI=EÞ variation of the substrate ð1 1Þ Bragg spots. It is shown that ethylene is di-r-bonded on clean Pdð111Þ, where the measured geometry is in agreement with the ...
متن کاملChemistry of acetylene on platinum (111) and (100) surfaces.
An ultra-high vacuum experimental study of acetylene chemisorption on Pt(111) and Pt(100) and of the reaction of hydrogen with the acetylene adsorbate has established distinguishing features of carbon-hydrogen bond breaking and making processes as a function of pressure, temperature, and surface crystallography. The rates for both processes are substantially higher on the Pt(100) surface. Net a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Surface Science Letters
سال: 1986
ISSN: 0167-2584
DOI: 10.1016/0167-2584(86)90855-8