Photoelectron Spectroscopy Study of Stoichiometric and Reduced Anatase TiO2(101) Surfaces: The Effect of Subsurface Defects on Water Adsorption at Near-Ambient Pressures
作者： Mark J. Jackman , Andrew G. Thomas , Chris Muryn
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摘要: X-ray photoelectron (XPS) experiments at normal and grazing emission are performed, demonstrating the labile nature of anatase TiO2(101) surface after argon cluster ion sputtering propensity oxygen vacancies to migrate subsurface room temperature. Near-ambient XPS (NAP-XPS) shows that molecular water adsorbs on pressures 0.6 mbar above, temperature, in a mixed dissociated state. Water similar fashion both sputtered stoichiometric surfaces reaches saturation point between 1.8 This means there is little difference reactivity with regards adsorption surfaces, giving credence theory has superior photocatalytic activity over rutile due tendency lie subsurface, therefore being able contribute photocatalysis without quenched by adsorbates.
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J. Blomquist, L. E. Walle, P. Uvdal, A. Borg, A. Sandell, Water Dissociation on Single Crystalline Anatase TiO2(001) Studied by Photoelectron Spectroscopy Journal of Physical Chemistry C. ,vol. 112, pp. 16616- 16621 ,(2008) , 10.1021/JP805664B
Ulrike Diebold, The surface science of titanium dioxide Surface Science Reports. ,vol. 48, pp. 53- 229 ,(2003) , 10.1016/S0167-5729(02)00100-0
S. Gan, Y. Liang, D. R. Baer, M. R. Sievers, G. S. Herman, C. H. F. Peden, Effect of Platinum Nanocluster Size and Titania Surface Structure upon CO Surface Chemistry on Platinum-Supported TiO2 (110) Journal of Physical Chemistry B. ,vol. 105, pp. 2412- 2416 ,(2001) , 10.1021/JP003125Z
John R. Swierk, Thomas E. Mallouk, Design and development of photoanodes for water-splitting dye-sensitized photoelectrochemical cells Chemical Society Reviews. ,vol. 42, pp. 2357- 2387 ,(2013) , 10.1039/C2CS35246J
David A. Armitage, David M. Grant, Characterisation of surface-modified nickel titanium alloys Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 349, pp. 89- 97 ,(2003) , 10.1016/S0921-5093(02)00818-3
W Göpel, J.A Anderson, D Frankel, M Jaehnig, K Phillips, J.A Schäfer, G Rocker, Surface defects of TiO2(110): A combined XPS, XAES AND ELS study Surface Science. ,vol. 139, pp. 333- 346 ,(1984) , 10.1016/0039-6028(84)90054-2
Gang Lu, Steven L. Bernasek, Jeffrey Schwartz, Oxidation of a polycrystalline titanium surface by oxygen and water Surface Science. ,vol. 458, pp. 80- 90 ,(2000) , 10.1016/S0039-6028(00)00420-9
Hongzhi Cheng, Annabella Selloni, Surface and subsurface oxygen vacancies in anatase TiO 2 and differences with rutile Physical Review B. ,vol. 79, pp. 092101- ,(2009) , 10.1103/PHYSREVB.79.092101
Guido Ketteler, Susumu Yamamoto, Hendrik Bluhm, Klas Andersson, David E. Starr, D. Frank Ogletree, Hirohito Ogasawara, Anders Nilsson, Miquel Salmeron, The Nature of Water Nucleation Sites on TiO2(110) Surfaces Revealed by Ambient Pressure X-ray Photoelectron Spectroscopy Journal of Physical Chemistry C. ,vol. 111, pp. 8278- 8282 ,(2007) , 10.1021/JP068606I
L. E. Walle, A. Borg, E. M. J. Johansson, S. Plogmaker, H. Rensmo, P. Uvdal, A. Sandell, Mixed Dissociative and Molecular Water Adsorption on Anatase TiO2(101) Journal of Physical Chemistry C. ,vol. 115, pp. 9545- 9550 ,(2011) , 10.1021/JP111335W