Mechanism of Surface Intermediate Formation During the Reactions Between Adsorbed Molecules and Atoms: NO + H, NO + C, O2 + H, C2 + H, on Platinum Full article
| Conference |
8th International Symposium on Relations between Homogeneous and Heterogeneous Catalysis 10-14 Sep 1995 , Balatonfured |
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| Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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| Output data | Year: 1996, Volume: 107, Number: 1-3, Pages: 359-366 Pages count : 8 DOI: 10.1016/1381-1169(95)00175-1 | ||||
| Tags | Hydrogen, Mechanisms, Monocrystal surface, Nitric oxide, Oxygen, Platinum, Surface carbon, Surface intermediates | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 93-03-4793 |
| 2 | International Science Foundation | RAM 000 |
Abstract:
The NOad + Had, NOad + Cad, O2ad + Had, C2ad + Had reactions were studied on Pt(111) surface by HREELS. It was shown that at low temperatures these catalytic reactions are promoted via addition of the active atomic adsorbates to the diatomic molecules resulting in 3-atom intermediates. On the NO + H2 reaction, it was discovered that an adsorbed hydrogen atom adds to a bridge NOad molecule resulting in a η2-HNOad intermediate. In turn, the intermediate reacts with other Had to produce first a dissociative nitrogen and then N2 and NH3. An isolated Cad obtained by evaporation from a special source of carbon atom was found to react with NOad even at 100 K producing an intermediate gulminate particle CNOad. On being heated, it converts via an intramolecular rearrangement reaction into the more stable isocyanate NCOad, and further into on-top COad and Nad. The peroxide-type molecular oxygen O2ad2− was observed to react with hydrogen even at 105 K yielding first a hydroxyl intermediate and an atomic oxygen adsorbate and, subsequently, water molecules. Hydrogen atom was observed to add to a C2ad molecule yielding first an ethynyl moiety. The subsequent addition of two other hydrogen atoms produces ethylidyne. Details of the experimental evidence for these reaction mechanisms are discussed.
Cite:
Smirnov M.Y.
, Gorodetskii V.V.
, Block J.H.
Mechanism of Surface Intermediate Formation During the Reactions Between Adsorbed Molecules and Atoms: NO + H, NO + C, O2 + H, C2 + H, on Platinum
Journal of Molecular Catalysis A: Chemical. 1996. V.107. N1-3. P.359-366. DOI: 10.1016/1381-1169(95)00175-1 WOS Scopus РИНЦ ANCAN OpenAlex
Mechanism of Surface Intermediate Formation During the Reactions Between Adsorbed Molecules and Atoms: NO + H, NO + C, O2 + H, C2 + H, on Platinum
Journal of Molecular Catalysis A: Chemical. 1996. V.107. N1-3. P.359-366. DOI: 10.1016/1381-1169(95)00175-1 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Published print: | May 6, 1996 |
| Published online: | Oct 7, 1998 |
Identifiers:
| Web of science: | WOS:A1996UR98100042 |
| Scopus: | 2-s2.0-0030572044 |
| Elibrary: | 13224882 |
| Chemical Abstracts: | 1996:348200 |
| Chemical Abstracts (print): | 125:124770 |
| OpenAlex: | W2085075065 |