✦ LIBER ✦

Conversion of vinyl to ethylidyne on Pt(111)

✍ Scribed by X.-L. Zhou; Z.-M. Liu; J.M. White

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 587 KB
Volume: 195
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85573-s

No coin nor oath required. For personal study only.

✦ Synopsis

Using predosed oxygen temperature programmed desorption (POTPD) , we find evidence that the conversion of vinyl ( CHCHZ ), derived from thermal dissociation of vinyl iodide, to ethylidyne (CCH,) on Pt( I 11) is not a simple 1,2-H-atom shift reaction, but rather involves transient H-Pt bond formation. POTPD shows that this conversion process starts at about 130 K, confirming earlier temperature programmed static secondary ion mass spectroscopy (TPSSIMS) results of Liu et al. We estimate an effective activation energy of 2.4kO.2 kcal/mol and a pre-exponential factor of 10'.4'o * s-l for this conversion.

📜 SIMILAR VOLUMES

Infrared spectroscopy of ethylidyne on p

Infrared spectroscopy of ethylidyne on pt(111)

✍ I.J. Malik; M.E. Brubaker; M. Trenary 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 486 KB

Orientation and bonding of ethylene and

Orientation and bonding of ethylene and ethylidyne on Pt(111) by means of near-edge x-ray absorption fine structure spectroscopy

✍ R.J. Koestner; J. Stöhr; J.L. Gland; J.A. Horsley 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 282 KB

183 Ncmedgc X-lay abwrption fur ~Iructufc (NEXAI'S) 5ycclr;r h.m been rric~succd for cihylcnc chcrtuuuhcd on Pi(l 11) JI 90 and 300 K. From the poLriL(ltion dcpendena: of the J~CLII~ ~1 90 K, cthylcnc L\ found IO Ir down wlih a n bond 10 the rurl'ace. Thhc spcclr~ cmlkltrl 31 300 K mdicar a C C bond

Hydrogenation of isoprene on Pt(111)

✍ D. Vassilakis; E. Margot; C.-M. Pradier; Y. Berthier 📂 Article 📅 1990 🏛 Elsevier Science ⚖ 611 KB

A DFT study of H adsorption on Pt(111) a

A DFT study of H adsorption on Pt(111) and Pt–Ru(111) surfaces

✍ Carolina Pistonesi; Estela Pronsato; Alfredo Juan 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 422 KB

Photoreactions of adsorbed CH3Br on Pt(1

Photoreactions of adsorbed CH3Br on Pt(111)

✍ G. Radhakrishnan; W. Stenzel; H. Conrad; A.M. Bradshaw 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 689 KB

Photochemistry of ketene adsorbed on Pt(

Photochemistry of ketene adsorbed on Pt(111)

✍ B. Roop; S.A. Costello; C.M. Greenlief; J.M. White 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 524 KB

The photochemistry of ketene adsorbed on Pt( 111) has been studied by illuminating the adsorbate-metal system with UV photons (2 in the range 300-420 nm) and detecting changes in the chemisorbed layer as reflected in the subsequent thermal desorption and SIMS spectra. The photon-induced changes were