A New Indicator for Single Metal Dispersion on a TiO2(110) Surface Premodified with a Mercapto Compound
| Autor: | Akitoshi Kunimoto, Natee Sirisit, Hiromitsu Uehara, Wang-Jae Chun, Yohei Uemuara, Hiroko Ariga, Kiyotaka Asakura, Yasuhiro Iwasawa, Takahiro Wada, Satoru Takakusagi, Tadashi Ohba |
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| Rok vydání: | 2016 |
| Předmět: |
Total internal reflection
Structure analysis Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Metal Crystallography General Energy visual_art Mercapto compound Lattice (order) visual_art.visual_art_medium Physical chemistry Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 120:15785-15791 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b11630 |
| Popis: | Ni and Pt structures evaporated onto a TiO2(110) surface premodified with ortho-mercaptobenzoic acid (o-MBA) were studied using polarization-dependent total reflection fluorescence X-ray absorption fine structure analysis to determine the effects of the premodification on the dispersion of the metal atoms over the TiO2(110) surface. Ni was found to be atomically dispersed with the formation of S–Ni–O bonds (where the S is provided by the o-MBA and the O is present in the TiO2 lattice) on the surface. In contrast, Pt underwent aggregation to form small clusters. The varying behavior of these metals on the o-MBA-modified TiO2(110) surface is discussed based on the energy difference between sulfur–metal–oxygen and metal–metal bond formations, and we propose a new indicator for single metal dispersion on the TiO2(110) surface. |
| Databáze: | OpenAIRE |
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