Abstract
The analysis of FTIR absorption spectra of CO and of12CO-13CO isotopic mixtures is reported for gold catalysts supported on a number of oxides. Relationships between the nanostructure and the CO adsorbing properties of the different gold catalysts are discussed. In particular, on titania supported gold, where particles of metallic nature are present, two kinds of surface sites do adsorb CO, the 6-coordinated corners and the 7- coordinated edges, while the terrace sites, 8 coordinated, are not able to adsorb even at 90 K. Moreover, the adsorbing sites are not isolated, but mutually interacting. On zirconia supported gold, the adsorbing sites, mutually interacting, are exposed at the surface of non metallic gold nanoclusters. Almost isolated and negatively charged gold adsorbing nanoclusters have been highlighted on the sample supported on reduced ceria, and, finally, isolated cationic sites on oxidized gold supported on a mixed ceria-titania oxide have been detected.
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J.A. Rodriguez, S. Ma, P. Liu, J. Hrbek, J. Evans and M. Perez,Science, 2007,318, 1757
Q. Fu, H. Saltsburg and M. Flytzani-Stephanopoulos,Science, 2003,301, 935
N. Scheppard and T.T. Nguyen in:Advances in Infrared and Raman Spectroscopy, Eds. R.J.H. Clark and R.E. Hester (Heyden, London, 1978)
P. Hollins, K.J. Davies and J. Pritchard,Surface Sci, 1984,138, 75
B.E. Hayden, K. Kretzschmar, A.M. Bradshaw and R.G. Greenler,Surface Sci., 1985,149, 394
P. Hollins,Surf. Sci. Rep., 1992,16, 51
F. Boccuzzi, A. Chiorino, S. Tsubota and M. Haruta,Catal Lett., 1994,29, 225
F. Boccuzzi, A. Chiorino, S. Tsubota and M. Haruta,J. Phys. Chem., 1996,100, 3625
F. Boccuzzi, A. Chiorino and M. Manzoli,Surface Sci., 2000,454/456, 942
F. Boccuzzi and A. Chiorino,J. Phys. Chem. B, 2000,104, 5414
F. Boccuzzi, A. Chiorino, M. Manzoli, P. Lu, T. Akita, S. Ichikawa and M. Haruta,J. Catal., 2001,202, 256
T. Tabakova, F. Boccuzzi, M. Manzoli and D. Andreeva,Appl. Catal. A: Gen., 2003,252, 385
T. Tabakova, F. Boccuzzi, M. Manzoli and J.W. Sobczak, V. Idakiev and D. Andreeva,Appl. Catal. B-Environ., 2004,49, 73
M. Manzoli, F. Boccuzzi, A. Chiorino, F. Vindigni, Weiling Deng and M. Flytzani-Stephanopoulos,J. Catal., 2007,245, 308
G. Avgouropoulos, M. Manzoli, F. Boccuzzi, T. Tabakova, J. Papavasiliou, T. Ioannides and V. Idakiev,J. Catal., 2008,256, 237
T. Tabakova and V. Idakiev, K. Tenchev, F. Boccuzzi, M. Manzoli and A. Chiorino,Applied Catal. B: Environmental, 2006,22, 9
F. Boccuzzi, A. Chiorino, M. Manzoli, D. Andreeva and T. Tabakova,J. Catal., 1999,188, 176
F. Boccuzzi, G. Cerrato, F. Pinna and G. Strukul,J. Phys. Chem. B, 1998,102, 5733
F. Menegazzo, F. Pinna, M. Signoretto, V. Trevisan, F. Boccuzzi, A. Chiorino and M. Manzoli,ChemSusChem, 2008,1, 320
F. Vindigni, M. Manzoli, A. Chiorino, T. Tabakova and F. Boccuzzi,J. Phys. Chem. B, 2006,110, 23329
C. Ruggiero and P. Hollins,Surf. Sci., 1997,377–379, 583
M. Valden, X. Lai and D.W. Goodman,Science, 1998,281, 1647
P.S. Bagus and G. Pacchioni,J. Phys: Conference Series, 2008, doi:10.1088/1742-6596/117/1/012003
F. Boccuzzi, S. Tsubota and M. Haruta,J. Electr. Spectr. Rel. Phenomen., 1993,64/65, 241
F. Menegazzo, M. Manzoli, A. Chiorino, F. Boccuzzi, T. Tabakova, M. Signoretto, F. Pinna and N. Pernicone,J. Catal., 2006,237, 431
A. Chiorino, M. Manzoli, F. Menegazzo, M. Signoretto, F. Vindigni, F. Pinna and F. Boccuzzi,J. Catal., 2009,262, 169, doi 10.1016/jcat2008.12.017
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Floriana Vindignihas taken her PhD in the Department of Chimica IFM at the Università di Torino in the field of Physical Chemistry. The research work is focused on the characterisation, by spectroscopic methods of nanostructured solid materials for catalytic application. Particularly her interest is devoted to the study of gold catalysts supported on different oxides for the hydrogen production and purification.
Maela Manzoli is a Research Technician in the Department of Chimica IFM and in the NIS Centre of Excellence at the Università di Torino. She has experience in the spectroscopic characterisation of metal nanoparticles supported on oxidic systems for catalytic application. In addition, she developed her skills in the characterisation of nanostructured materials by high resolution electron microscopy.
Anna Chiorino is Associate Professor of Physical Chemistry at the Università di Torino. She does research in the Department of Chimica IFM and in the NIS Centre of Excellence on surface properties and surface reactivity of nanostructured solid materials for catalytic application, mainly by spectroscopic methods, FTIR in particular, together with surface texture characterizations and with gas phase analysis.
Flora Boccuzzi is full Professor of Physical Chemistry at the Università di Torino. She does research in the Department of Chimica IFM and in the NIS Centre of Excellence. She works in the fields of Solid State Chemistry and Catalysis. Recently her scientific interest has been focused on the relationships between the surface structure and reactivity of gold supported on different oxides by the combined use of different techniques, in collaboration with different national and international institutions and universities.
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Vindigni, F., Manzoli, M., Chiorino, A. et al. Catalytically active gold sites: nanoparticles, borderline sites, clusters, cations, anions? FTIR spectra analysis of12CO and of12CO-13CO isotopic mixtures. Gold Bull 42, 106–112 (2009). https://doi.org/10.1007/BF03214920
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DOI: https://doi.org/10.1007/BF03214920