Pt and Pt/Al2O3 thin films for investigation of catalytic solid-liquid interfaces by ATR-IR spectroscopy: CO adsorption, H2-induced reconstruction and surface enhanced absorption
作者： Davide Ferri , Thomas Bürgi , Alfons Baiker
DOI: 10.1021/JP002268I
关键词: Attenuated total reflection 、 Thin film 、 Infrared spectroscopy 、 Platinum 、 Adsorption 、 X-ray photoelectron spectroscopy 、 Absorption (chemistry) 、 Materials science 、 Catalysis 、 Analytical chemistry
摘要: Model platinum catalysts have been designed to study the platinum−solvent interface in situ using attenuated total reflection (ATR) infrared spectroscopy. Pt and Pt/Al2O3 thin films were evaporated on a Ge internal element (IRE) characterized by XRD, XPS, AFM, STM, IR Changes within adsorbate layer of catalyst during cleaning with O2 H2 followed. After cleaning, surface was probed CO adsorption from CH2Cl2. For film spectrum adsorbed showed band at 2000 cm-1, which is typical for catalysts. The stretching vibration linearly bonded exhibited coverage-dependent frequency shift due vibrational coupling, thus showing existence large clean domains reactive even presence an organic solvent. CH2Cl2 slow before process. However, subsequent admission resulted instantaneous drastic increase absorption ...
acs.org
core.ac.uk
sci-hub.se 参考文章(45)
Gabor A. Somorjai, Xingcai Su, Keith R. McCrea, Keith B. Rider, Molecular surface studies of adsorption and catalytic reaction on crystal (Pt, Rh) surfaces under high pressure conditions (atmospheres) using sum frequency generation (SFG) – surface vibrational spectroscopy and scanning tunneling microscopy (STM) Topics in Catalysis. ,vol. 8, pp. 23- 34 ,(1999) , 10.1023/A:1019152909371
J. Raskó, J. Bontovics, FTIR study of the rearrangement of adsorbed CO species on Al2O3-supported rhodium catalysts Catalysis Letters. ,vol. 58, pp. 27- 32 ,(1999) , 10.1023/A:1019053228217
Alison Crossley, David A King, Infrared spectra for co isotopes chemisorbed on Pt “111”: Evidence for strong absorbate coupling interactions Surface Science. ,vol. 68, pp. 528- 538 ,(1977) , 10.1016/0039-6028(77)90245-X
Yoshiko Nakao, Haruka Yamada, Enhanced infrared ATR spectra of surface layers using metal films Surface Science. ,vol. 176, pp. 578- 592 ,(1986) , 10.1016/0039-6028(86)90056-7
A. Hartstein, J. R. Kirtley, J. C. Tsang, Enhancement of the Infrared Absorption from Molecular Monolayers with Thin Metal Overlayers Physical Review Letters. ,vol. 45, pp. 201- 204 ,(1980) , 10.1103/PHYSREVLETT.45.201
Minh-Chau Pham, Jamal Moslih, Monique Simon, Pierre-Camille Lacaze, In-situ IR study by MIRFTIRS of adsorption and oxidation of methanol on sputtered platinum electrodes in sulphuric acid solution Journal of Electroanalytical Chemistry. ,vol. 282, pp. 287- 294 ,(1990) , 10.1016/0022-0728(91)85106-Y
Edilson V. Benvenutti, Leonardo Franken, Celso C. Moro, Celso U. Davanzo, FTIR Study of Hydrogen and Carbon Monoxide Adsorption on Pt/TiO2, Pt/ZrO2, and Pt/Al2O3 Langmuir. ,vol. 15, pp. 8140- 8146 ,(1999) , 10.1021/LA990195S
Y. F. Hsieh, L. J. Chen, Interfacial reactions of platinum thin films on (111) and (001) germanium Journal of Applied Physics. ,vol. 63, pp. 1177- 1181 ,(1988) , 10.1063/1.341137
Masatoshi Osawa, Masahiko Ikeda, Surface-enhanced infrared absorption of p-nitrobenzoic acid deposited on silver island films: contributions of electromagnetic and chemical mechanisms The Journal of Physical Chemistry. ,vol. 95, pp. 9914- 9919 ,(1991) , 10.1021/J100177A056
Masatoshi Osawa, Ken-ichi Ataka, Electromagnetic mechanism of enhanced infrared absorption of molecules adsorbed on metal island films Surface Science. ,vol. 262, pp. 118- 122 ,(1992) , 10.1016/0039-6028(92)90119-Q