Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Adsorption and decomposition of formic acid (DCOOD) on NiO(111) and Ni(111) surfaces probed by SFG
Autore:
Bandara, A; Kubota, J; Wada, A; Domen, K; Hirose, C;
Indirizzi:
Tokyowanst Technol, Resources Utilizat Res Lab, Midori Ku, Yokohama, Kanaga Tokyo Inst Technol Yokohama Kanagawa Japan 2268503 i Ku, Yokohama, Kanaga
Titolo Testata:
APPLIED PHYSICS B-LASERS AND OPTICS
fascicolo: 3, volume: 68, anno: 1999,
pagine: 573 - 578
SICI:
0946-2171(199903)68:3<573:AADOFA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADSORBATE-SUBSTRATE VIBRATION; LASER-INDUCED DESORPTION; ENERGY LOSS SPECTROSCOPY; FORMATE; IRAS; DYNAMICS; KINETICS; SI(111); DEHYDRATION; CHEMISTRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Hirose, C TokyoYokohama,hnol, Resources Utilizat Res Lab, Midori Ku, 4259 Nagatsuta, Tokyo Inst Technol 4259 Nagatsuta Yokohama Kanagawa Japan 2268503
Citazione:
A. Bandara et al., "Adsorption and decomposition of formic acid (DCOOD) on NiO(111) and Ni(111) surfaces probed by SFG", APP PHYS B, 68(3), 1999, pp. 573-578

Abstract

Adsorption and decomposition of formic acid (DCOOD) on NiO(111)/Ni(111) and Ni(111) surfaces under ultrahigh vacuum (UHV) conditions and the steady flow of DCOOD gas were investigated by sum-frequency generation (SFG) spectroscopy. Formates adsorbed via two carbonyl oxygen atoms were produced by the adsorption and the species on the oxide surface had two orientations in UHV; the species which decomposed at around 300 K was tilted from the surface normal and that decomposing at similar to 400 K was vertical to the surface. We induced the decomposition on the oxide surface by irradiation with picosecond 1064 nm pulses which caused the surface temperature to jump by similar to 300 K with similar to 100 ps decay time. The transient temperaturejump transformed reversibly the stable formates to the monodentate formateadsorbed via one oxygen atom and the decomposition occurred at 100 K abovethe onset temperature 275 K of the transformation. The transformation was ascribed to the shift of chemical equilibrium due to the laser induced temperature jump. The energy difference between the two species and the activation energy for the decomposition of monodentate formate were derived.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 20:24:29