Enhanced bonding of gold nanoparticles on oxidized TiO2(110).
作者： D. Matthey , J. G. Wang , S. Wendt , J. Matthiesen , R. Schaub
关键词:
摘要: We studied the nucleation of gold clusters on TiO2(110) surfaces in three different oxidation states by high-resolution scanning tunneling microscopy. The supports chosen were (i) reduced (having bridging oxygen vacancies), (ii) hydrated hydroxyl groups), and (iii) oxidized adatoms). At room temperature, nanoclusters nucleate homogeneously terraces supports, whereas surface, form preferentially at step edges. From interplay with density functional theory calculations, we identified two gold-TiO2(110) adhesion mechanisms for supports. is strongest support, implications this finding catalytic applications are discussed.
sciencemag.org
harvard.edu
tntconf.org 
researchgate.net 参考文章(33)
G.R. Bamwenda, S. Tsubota, T. Nakamura, M. Haruta, The influence of the preparation methods on the catalytic activity of platinum and gold supported on TiO2 for CO oxidation Catalysis Letters. ,vol. 44, pp. 83- 87 ,(1997) , 10.1023/A:1018925008633
B. Schumacher, V. Plzak, M. Kinne, R.J. Behm, Highly Active Au/TiO2 Catalysts for Low-Temperature CO Oxidation: Preparation, Conditioning and Stability Catalysis Letters. ,vol. 89, pp. 109- 114 ,(2003) , 10.1023/A:1024731812974
L. M. Molina, M. D. Rasmussen, B. Hammer, Adsorption of O2 and oxidation of CO at Au nanoparticles supported by TiO2(110) The Journal of Chemical Physics. ,vol. 120, pp. 7673- 7680 ,(2004) , 10.1063/1.1687337
Xiao Tong, Lauren Benz, Paul Kemper, Horia Metiu, Michael T. Bowers, Steven K. Buratto, Intact Size-Selected Aun Clusters on a TiO2(110)-(1 × 1) Surface at Room Temperature Journal of the American Chemical Society. ,vol. 127, pp. 13516- 13518 ,(2005) , 10.1021/JA052778W
Sungsik Lee, Chaoyang Fan, Tianpin Wu, Scott L. Anderson, CO oxidation on Aun/TiO2 catalysts produced by size-selected cluster deposition. Journal of the American Chemical Society. ,vol. 126, pp. 5682- 5683 ,(2004) , 10.1021/JA049436V
Javier Guzman, Silvio Carrettin, Avelino Corma, Spectroscopic evidence for the supply of reactive oxygen during CO oxidation catalyzed by gold supported on nanocrystalline CeO2. Journal of the American Chemical Society. ,vol. 127, pp. 3286- 3287 ,(2005) , 10.1021/JA043752S
Flora Boccuzzi, Anna Chiorino, FTIR Study of CO Oxidation on Au/TiO2 at 90 K and Room Temperature. An Insight into the Nature of the Reaction Centers Journal of Physical Chemistry B. ,vol. 104, pp. 5414- 5416 ,(2000) , 10.1021/JP000749W
Ulrike Diebold, The surface science of titanium dioxide Surface Science Reports. ,vol. 48, pp. 53- 229 ,(2003) , 10.1016/S0167-5729(02)00100-0
Hakim Iddir, Serdar Öğüt, Nigel D. Browning, Mark M. Disko, Erratum: Adsorption and diffusion of Pt and Au on the stoichiometric and reduced TiO 2 rutile (110) surfaces [Phys. Rev. B 72, 081407(R) (2005)] Physical Review B. ,vol. 73, pp. 039902- ,(2006) , 10.1103/PHYSREVB.73.039902
Qi Fu, Howard Saltsburg, Maria Flytzani-Stephanopoulos, Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts. Science. ,vol. 301, pp. 935- 938 ,(2003) , 10.1126/SCIENCE.1085721