CO oxidation on bimetallic catalytic surfaces studied by ambient-pressure X-ray photoelectron spectroscopy - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2014

CO oxidation on bimetallic catalytic surfaces studied by ambient-pressure X-ray photoelectron spectroscopy

M.A. Languille
H.C. Lee
  • Fonction : Auteur
C.K. Jeong
  • Fonction : Auteur
H. Kondoh
  • Fonction : Auteur
Y. Jugnet
  • Fonction : Auteur
J.C. Bertolini
  • Fonction : Auteur
Z. Liu
  • Fonction : Auteur
F. Bournel
J.J. Gallet.
  • Fonction : Auteur
B.S. Mun.
  • Fonction : Auteur

Résumé

CO oxidation on bimetallic catalytic surfaces studied by ambient-pressure X-ray photoelectron spectroscopy M.A. Languille1,§, E. Ehret1, H.C. Lee2, C.K. Jeong2, T. Ryo3, H. Kondoh3, Y. Jugnet1, J.C. Bertolini1, Z. Liu4, G Olivieri5, F. Bournel5, J.J. Gallet5, B.S. Mun2 and F.J. Cadete Santos Aires1 1Institut de Recherches sur la Catalyse et l’Environnement de Lyon (UMR 5256 CNRS/Univ. Lyon 1), 2, Av. Albert Einstein. 69626-Villeurbanne cedex. France. 2Department of Physics and Photon Science, School of Physics and Chemistry, Ertl Center for Electrochemistry and Catalysis, Gwangju Institute of Science and Technology. Korea. 3Department of Chemistry, Keio University, Yokohama 223-8522. Japan. 4Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720. USA. 5Laboratoire de Chimie Physique – Matière et Rayonnement (UMR 7614 CNRS/Univ. P. & M. Curie). 11, Rue Pierre et Marie Curie. 75231 Paris Cedex 05. France. § present address : Centre de Recherches sur la Conservation des Collections (USR3224 CRC), Muséum National d’Histoire Naturelle. 36, Rue Geoffroy Saint-Hilaire – CP 21. 75005-Paris. France. ABSTRACT Even though the study of gaseous molecules has been tackled since the early days of X-ray photoelectron spectroscopy (XPS)1,2, a new design and the use of synchrotron facilities, as (tunable) X-ray sources, has increased the interest of using ambient (or near-ambient) pressure XPS (AP-XPS or NAP-XPS)3-5 to study solid gas/solid and liquid/solid interfaces. This is particularly true when you want to access chemical and electronic properties of catalytic surfaces in realistic reaction conditions (variable P, T). We are interested in the study of bimetallic catalytic surfaces and their chemical/electronic surface properties during the oxidation of carbon monoxide. Indeed, the low temperature catalytic oxidation of carbon monoxide to carbon dioxide is an important reaction used in several areas and in particular for removing the CO traces from the H2 combustible for fuel cell applications. Pt and Au are well known catalysts for the CO oxidation reaction, however on both metals the oxygen dissociation remains the rate determining step. Alloying Pt or Au with a second metal, that facilitates the oxygen activation while keeping free sites for CO adsorption on the surface, appears as an effective way to improve the catalytic performances of these two metals. Based on the performance of real catalysts (bimetallic nanoparticles supported on oxides), we have thus chosen to study by (N)AP-XPS two surfaces : Pt3Sn(111) (with two surface terminations - (2x2) and (√3x√3) depending on the annealing temperature)6 and Pd70Au30(110). REFERENCES 1. K. Siegbahn, C. Nordling, G. Johannson, J. Hedman, P.F. Heden, K. Hamrin, U. Gelius, T. Bergmark, L.O. Werme, R. Manne, Y. Baer, ESCA Applied to Free Molecules, Amsterdam, London: North Holland, 1969. 2.H. Siegbahn, K. Siegbahn, J. Electron Spectrosc. Relat. Phenom 2, 319-325 (1973). 3.D.F. Ogletree, H. Bluhm, G. Lebedev, C. Fadley, Z. Hussain, M. Salmeron, Rev. Sci. Instr. 73, 3872-3877 (2002). 4. M. Salmeron, R. Schlögl, Surf. Sci. Reports 63,169-199 (2008). 5. M.E. Grass, P.G. Karlsson, F. Aksoy, M. Lundqvist, B. Wannberg, B.S. Mun, Z. Hussain, Z. Liu, Rev. Sci. Instr. 81, 053106 (2010). 6. Y. Jugnet, D. Loffreda, C. Dupont, F. Delbecq, E. Ehret, F.J. Cadete Santos Aires, B.S. Mun, F. Aksoy Akgul, Z. Liu, J. Phys. Chem. Lett. 3, 3707-3714 (2012).
Fichier non déposé

Dates et versions

hal-01108935 , version 1 (23-01-2015)

Identifiants

  • HAL Id : hal-01108935 , version 1

Citer

M.A. Languille, E. Ehret, H.C. Lee, C.K. Jeong, H. Kondoh, et al.. CO oxidation on bimetallic catalytic surfaces studied by ambient-pressure X-ray photoelectron spectroscopy. International workshop on surface chemistry and near-ambient pressure photoemission; new tools and new paradigms, Dec 2014, SAint-Aubin (SOLEIL), France. ⟨hal-01108935⟩
123 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More